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Articoli di riviste sul tema "Photonic crystal resonator"

Autore: Grafiati
Pubblicato: 25 gennaio 2025

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1

Olyaee, Saeed. "Ultra-fast and compact all-optical encoder based on photonic crystal nano-resonator without using nonlinear materials". Photonics Letters of Poland 11, n. 1 (3 aprile 2019): 10. http://dx.doi.org/10.4302/plp.v11i1.890.

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Abstract (sommario):
In this paper an ultra-compact all-optical encoder is presented by using a two-dimensional photonic crystal. The designed logic gate is based on the interference effect. The proposed structure consists of several photonic crystal waveguides connected by 2 nano-resonators. The nano-resonators are designed to reduce the size of the radius of the dielectric rods. The contrast ratios and delay time for the proposed all-optical encoder are respectively 6 dB and 125 fs. The size of the structure is equal to 132 µm2. Equality of the output power in the logic states “one”, the small dimensions, the low delay time, compact and simple structure have shown that the logic gate is suitable for the using in optical integrated circuits. Full Text: PDF ReferencesA. Salmanpour, Sh. Mohammadnejad, A. Bahrami, "Photonic crystal logic gates: an overview", Optical and Quantum Electronics. 47, 2249 (2015). CrossRef S. C. Xavier, B. E. Carolin, A. p. Kabilan, W. Johnson, "Compact photonic crystal integrated circuit for all-optical logic operation", IET Optoelectronics. 10, 142 (2016). CrossRef Y. Miyoshi, K. Ikeda, H. Tobioka, T. Inoue, S. Namiki, K. Kitayama, "Ultrafast all-optical logic gate using a nonlinear optical loop mirror based multi-periodic transfer function", Optics Express. 16, 2570 (2008). CrossRef D. K. Gayen, A. Bhattachryya, T. Chattopadhyay, J. N. Roy, "Ultrafast All-Optical Half Adder Using Quantum-Dot Semiconductor Optical Amplifier-Based Mach-Zehnder Interferometer", Journal of Lightwave Technology. 30, 3387 (2012). CrossRef A. Mohebzadeh-Bahabady, S. Olyaee, "All-optical NOT and XOR logic gates using photonic crystal nano-resonator and based on an interference effect", IET Optoelectronics. 12, 191 (2018). CrossRef Z. Mohebbi, N. Nozhat, F. Emami, "High contrast all-optical logic gates based on 2D nonlinear photonic crystal", Optics Communications. 355, 130 (2015). CrossRef M. Mansouri-Birjandi, M. Ghadrdan, "Full-optical tunable add/drop filter based on nonlinear photonic crystal ring resonators", Photonics and Nanostructures-Fundamentals and Applications. 21, 44 (2016). CrossRef H. Alipour-Banaei, S. Serajmohammadi, F. Mehdizadeh, "Effect of scattering rods in the frequency response of photonic crystal demultiplexers", Journal of Optoelectronics and Advanced Materials. 17, 259 (2015). DirectLink A. Mohebzadeh-Bahabady, S. Olyaee, H. Arman, "Optical Biochemical Sensor Using Photonic Crystal Nano-ring Resonators for the Detection of Protein Concentration", Current Nanoscience. 13, 421 (2017). CrossRef S. Olyaee, A. Mohebzadeh-Bahabady, "Designing a novel photonic crystal nano-ring resonator for biosensor application", Optical and Quantum Electronics. 47, 1881 (2015). CrossRef F. Parandin, R. Malmir, M. Naseri, A. Zahedi, "Reconfigurable all-optical NOT, XOR, and NOR logic gates based on two dimensional photonic crystals", Superlattices and Microstructures. 113, 737 (2018). CrossRef F. Mehdizadeh, M. Soroosh, H. Alipour-Banaei, "Proposal for 4-to-2 optical encoder based on photonic crystals", IET Optoelectronics. 11, 29 (2017). CrossRef M. Hassangholizadeh-Kashtiban, R. Sabbaghi-Nadooshan, H. Alipour-Banaei, "A novel all optical reversible 4 × 2 encoder based on photonic crystals", Optik. 126, 2368 (2015). CrossRef T. A. Moniem, "All-optical digital 4 × 2 encoder based on 2D photonic crystal ring resonators", Journal of Modern Optics. 63, 735 (2016). CrossRef S. Gholamnejad, M. Zavvari, "Design and analysis of all-optical 4–2 binary encoder based on photonic crystal", Optical and Quantum Electronics. 49, 302 (2017). CrossRef H. Seif-Dargahi, "Ultra-fast all-optical encoder using photonic crystal-based ring resonators", Photonic Network Communications. 36, 272 (2018). CrossRef S. Olyaee, M. Seifouri, A. Mohebzadeh-Bahabady, and M. Sardari, "Realization of all-optical NOT and XOR logic gates based on interference effect with high contrast ratio and ultra-compacted size", Optical and Quantum Electronics. 50, 12 (2018). CrossRef C. J. Wu, C. P. Liu, Z. Ouyang, "Compact and low-power optical logic NOT gate based on photonic crystal waveguides without optical amplifiers and nonlinear materials", Applied Optics.51, 680 (2012). CrossRef Y. C. Jiang, S. B. Liu, H. F. Zhang, X. K. Kong. "Realization of all optical half-adder based on self-collimated beams by two-dimensional photonic crystals", Optics Communications. 348, 90 (2015). CrossRef A. Salmanpour, S. Mohammadnejad, P. T. Omran, "All-optical photonic crystal NOT and OR logic gates using nonlinear Kerr effect and ring resonators", Optical and Quantum Electronics. 47, 3689 (2015). CrossRef E. H. Shaik, N. Rangaswamy, "Single photonic crystal structure for realization of NAND and NOR logic functions by cascading basic gates", Journal of Computational Electronics. 17, 337 (2018). CrossRef
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2

Glushko, E. Ya, O. E. Glushko e L. A. Karachevtseva. "Photonic Eigenmodes in a Photonic Crystal Membrane". ISRN Optics 2012 (1 marzo 2012): 1–6. http://dx.doi.org/10.5402/2012/373968.

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Abstract (sommario):
Photonic membranes are the most widely used kind of 2D photonic crystals in signal processing. Nevertheless, some important aspects of electromagnetic field behavior in membrane like photonic crystals (MPCs) need detail investigation. We develop the approach close to resonant coupling modes method which unites both external and intrinsic problems, in-plane and out-of-plane geometries, and resonator properties of MPC. The resonator standing modes are excited by an external source through the special inputs and may be controlled due to the nonlinear coating. Typical photonic manifestations are studied for Si/SiO2 2D membrane resonators of rectangular.
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3

Glushko, E. Ya. "Island-Kind 2D Photonic Crystal Resonator". Ukrainian Journal of Physics 62, n. 11 (dicembre 2017): 945–52. http://dx.doi.org/10.15407/ujpe62.11.0945.

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4

Tsarev, V. A., A. Yu Miroshnichenko, A. V. Gnusarev e N. A. Akafyeva. "Investigation of the Two-Mode Regime of Two-Gap Photonic-Crystal Resonance Systems Produced on a Printed Circuit Board with Fractal Elements "Minkowski Island". Journal of the Russian Universities. Radioelectronics 24, n. 5 (29 novembre 2021): 80–88. http://dx.doi.org/10.32603/1993-8985-2021-24-5-80-88.

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Introduction. The development of new amplifiers and generators of the Ku- and K-bands (12…27 GHz) for use in onboard equipment is increasingly attracting research interest. Low-voltage multi-beam klystrons (LMBK) can be a promising element base for such devices. Serious problems are associated with the need to suppress parasitic modes of oscillations in NMLK operating in the centimeter and millimeter range. A possible solution is to use double-gap photonic-crystal resonators (DPCR) in LMBK. Another promising direction for improving the characteristics of such resonators is to use resonant segments of strip lines with fractal elements. In this case, the strip lines are placed on a dielectric substrate in the interaction space. Such resonators exhibit new properties that are useful for klystrons (an increase in characteristic impedance, suppression of the spectrum of unwanted frequencies, a reduction in mass and dimensions).Aim. Determination of an optimal set of electrodynamic and electronic parameters of double-gap photonic-crystal resonance systems with fractal elements "Minkowski Island" when operated as part of the LMBK resonator system, excited on π- and 2π-modes of oscillation.Materials and methods. To calculate the electrodynamic parameters of resonators, the method of finite differences in the time domain was used. The well-known Wessel-Berg method was used to calculate electronic parameters, such as the Ge / G0 electronic conductivity and the coupling coefficient M.Results. The main electrodynamic parameters of the resonator – Q-factor, resonant frequency and characteristic impedance – were investigated. The electronic parameters of the resonator, the coefficient of coupling with the electron beam, and the relative electronic conductivity for π- and 2π-modes of oscillations were calculated. In this case, three variants of the resonator with zero, first and second iterations of the fractal element were investigated. The amplitude-frequency characteristics of the resonator were investigated with a change in the pitch of the photonic crystal lattice. An estimation of the inhomogeneity of the high-frequency field in the interaction spaces of the resonator was carried out. Operational conditions were determined simultaneously for two types of oscillations without self-excitation.Conclusion. The results can find application in the development of resonator systems for klystron-type devices in the centimeter and millimeter ranges.
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5

Swarnakar, Sandip, Sapna Rathi e Santosh Kumar. "Design of All Optical XOR Gate based on Photonic Crystal Ring Resonator". Journal of Optical Communications 41, n. 1 (18 dicembre 2019): 51–56. http://dx.doi.org/10.1515/joc-2017-0142.

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Abstract The photonic crystals (PhC) play an important role in building all optical logic devices and also recommended as solution for opto-electronic bottleneck in terms of speed and size. This paper put forward a design of XOR gate using Photonic Crystal Ring Resonator (PCRR). The ring resonator is a device which provides output on the basis of coupling of mode fields from a linear waveguide to circular ring. The proposed work is designed using two-dimensional (2D) square lattice photonic crystals within the dimensions of $\left( {37a \times 37a} \right)$ by putting silicon (Si) rods in silica (SiO2). The study of device is carried out using finite-difference-time-domain (FDTD) method and verified using MATLAB.
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6

Jannesari, Reyhaneh, Thomas Grille e Bernhard Jakoby. "Highly sensitive fluid sensing due to slow light in pillar-based photonic crystal ring resonators". tm - Technisches Messen 85, n. 7-8 (26 luglio 2018): 515–20. http://dx.doi.org/10.1515/teme-2017-0135.

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Abstract A design for a high quality factor photonic crystal ring resonator (PCRR) is presented. The PCRR is based on pillar type photonic crystals, which consist of a hexagonal array of silicon rods. The cavity is created by removing elements from the regular photonic crystal (PhC) grid. Achieving strong confinement of light intensity in the low index region is the advantage of this PCRR. In that manner, the interaction of light and analyte, which can be a liquid or a gas, will be enhanced. The high quality factor of the cavity (Q=1.0229\times {10}^{5}), along with strong overlap between the field of the resonant mode and the analyte as well as the low group velocity of PCRR modes yield enhanced light-matter interaction. An enhancement factor of \gamma =2.127\times {10}^{4} compared to the bulk light absorption in a homogenous material provides the potential for highly sensitive gas detection with a photonic crystal ring resonator.
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7

Wang, Feng, Chang Yu Ren, Dun Liang Ren, Bing Sheng Liu e Ren Xue Han. "Analyzing the Modality of Two-Dimensional Photonic Crystal Fiber Optical Micro-Resonators by Equivalent Refractive Index Mode". Applied Mechanics and Materials 44-47 (dicembre 2010): 2131–35. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.2131.

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This paper analyzes the modality of two-dimensional photonic crystal micro-resonators by adopting equivalent refractive index mode. In this paper, it controls the optical field distribution only through altering the thickness of light guide layer, while the parameter like resonator structure and crystal lattice arrangement remain stable. It discusses that it would arrive at a satisfactory photon locality while the refractive index of light guide layer material is gallium nitride , the thickness of light guide layer is and its equivalent refractive index is 2.1.This reveals the influence of micro-resonator light guide layer’s thickness towards the modality, providing a preferable pre-estimate method for the actual research of micro-resonators with higher quality.
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8

Nardi, Alberto, Alisa Davydova, Nikolai Kuznetsov, Miles H. Anderson, Charles Möhl, Johann Riemensberger, Tobias J. Kippenberg e Paul Seidler. "Integrated chirped photonic-crystal cavities in gallium phosphide for broadband soliton generation". Optica 11, n. 10 (16 ottobre 2024): 1454. http://dx.doi.org/10.1364/optica.530247.

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Chirped mirrors have underpinned advances in ultra-fast lasers based on bulk optics but have yet to be fully exploited in integrated photonics, where they could provide a means to engineer otherwise unattainable dispersion profiles for a range of nonlinear optical applications, including soliton frequency comb generation. The vast majority of integrated resonators for frequency combs make use of microring geometries, in which only waveguide width and height are varied to engineer dispersion. Here, we present an integrated photonic-crystal Fabry–Pérot resonator made of gallium phosphide (GaP), a material exhibiting a Kerr nonlinearity 200 times larger than that of silicon nitride and a high refractive index that permits the creation of strongly chirped photonic-crystal mirrors. Leveraging the additional degrees of freedom provided by integrated chirped mirrors, we disentangle optical losses from dispersion. We obtain an overall dispersion that is more anomalous than that achievable in both silicon nitride and gallium phosphide ring resonators with the same free-spectral range (FSR), while simultaneously obtaining higher quality factors than those of GaP ring resonators. With subharmonic pulsed pumping at an average power of 23.6 mW, we are able to access stable dissipative Kerr frequency combs in a device with a FSR of 55.9 GHz. We demonstrate soliton formation with a 3-dB bandwidth of 3.0 THz, corresponding to a pulse duration of 60 fs. This approach to cavity design based on photonic-crystal reflectors offers nearly arbitrary dispersion engineering over the optical transparency window of the nonlinear material.
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9

Zhao, Yixiong, Kunj Himanshu Vora, Gerd vom Bögel, Karsten Seidl e Jens Weidenmüller. "Design and simulation of a photonic crystal resonator as a biosensor for point-of-care applications". tm - Technisches Messen 87, n. 7-8 (26 luglio 2020): 470–76. http://dx.doi.org/10.1515/teme-2019-0127.

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AbstractPoint-of-care (POC) devices are essential for rapid testing of samples for early diagnosis of diseases. The accuracy and the sensitivity of the POC device depend mainly on the biosensors. The currently used POC devices require specialized operating personnel, long sample preparation time and high equipment costs. We aim to explain a bio-sensing concept using a photonic crystal (PC) resonator that would mitigate the drawbacks of the present sensing techniques. Photonic crystals consist of spatially arranged dielectric materials presenting a band gap that prevents electromagnetic waves of certain frequency range to propagate through it. PC resonators have shown to have very high sensitivities for bio-sensing applications at THz frequencies. A PC resonator with a high Q-factor is designed and simulated to detect the changes in the surrounding dielectric permittivity. As an application for detecting specific biomolecules, a protocol for surface functionalization has been explained. This will enable the selective binding of biomolecules from the sample. Shift in resonant frequency and attenuation in magnitude at the peak resonant frequency can be observed from the simulation results. These changes in the resonator properties can be indicative of the presence of a particular biomolecule or pathogen and its concentration within the sample.
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Liu, Hanqing, Jianfeng Tan, Peiguo Liu, Li-an Bian e Song Zha. "Tunable Coupled-Resonator-Induced Transparency in a Photonic Crystal System Based on a Multilayer-Insulator Graphene Stack". Materials 11, n. 10 (19 ottobre 2018): 2042. http://dx.doi.org/10.3390/ma11102042.

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We achieve the effective modulation of coupled-resonator-induced transparency (CRIT) in a photonic crystal system which consists of photonic crystal waveguide (PCW), defect cavities, and a multilayer graphene-insulator stack (MGIS). Simulation results show that the wavelength of transparency window can be effectively tuned through varying the chemical potential of graphene in MGIS. The peak value of the CRIT effect is closely related to the structural parameters of our proposed system. Tunable Multipeak CRIT is also realized in the four-resonator-coupled photonic crystal system by modulating the chemical potentials of MGISs in different cavity units. This system paves a novel way toward multichannel-selective filters, optical sensors, and nonlinear devices.
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11

Sakoda, Kazuaki, Yuanzhao Yao, Naoki Ikeda, Yoshimasa Sugimoto, Takaaki Mano, Takashi Kuroda, Hirotaka Tanimura et al. "Design and Characteristics of Photonic Crystal Resonators for Surface-Emitting Quantum Cascade Lasers". Photonics 11, n. 11 (30 ottobre 2024): 1024. http://dx.doi.org/10.3390/photonics11111024.

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We present our recent development of the surface-emitting quantum cascade laser with a PC (photonic crystal) resonator and a strain-compensated MQW (multiple quantum well) active layer operating at around 4.3 μm. We describe the laser performance mainly from the viewpoint of the design and analysis of the PC resonators, which include both numerical calculations by FEM (finite element method) and analytical calculations using the k·p perturbation theory and group theory. We analyze the resonance quality factor, overlap factor, extraction efficiency, and far-field pattern, and show how the output power and beam quality have been improved by the appropriate design of the PC resonator.
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Kim, Myung-Ki, In-Kag Hwang, Min-Kyo Seo e Yong-Hee Lee. "Reconfigurable microfiber-coupled photonic crystal resonator". Optics Express 15, n. 25 (2007): 17241. http://dx.doi.org/10.1364/oe.15.017241.

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13

Xu, Biaogang, Dengguo Zhang, Yong Wang, Binbin Hong, Guoxiang Shu e Wenlong He. "A Terahertz Circulator Based on Magneto Photonic Crystal Slab". Photonics 10, n. 4 (23 marzo 2023): 360. http://dx.doi.org/10.3390/photonics10040360.

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In this paper, a terahertz circulator based on a magneto photonic crystal slab is envisaged. The triangular lattice photonic crystals with a line defect waveguide were constructed on an Al2O3 ceramic slab. Two cylindrical ferrites and two copper-clad plates in the junction of the Y-shaped wave-guide worked as a magneto-optical cavity resonator to approve the nonreciprocal function. In the working frequency range, 0.212–0.238 THz, the isolation of the circulator was better than 20 dB, and the insertion loss was better than 1 dB. The designed circulator based on the magneto photonic crystal slab experienced low loss and a wide bandwidth that satisfied its use in the THz application.
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Serajmohammadi, Somaye, Hamed Alipour-Banaei e Farhad Mehdizadeh. "Application of Photonic Crystal Ring Resonators for Realizing All Optical Demultiplexers". Frequenz 72, n. 9-10 (28 agosto 2018): 465–70. http://dx.doi.org/10.1515/freq-2017-0272.

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Abstract Transmission efficiency, quality factor, crosstalk levels and number of output channels are the most crucial parameters in designing optical demultiplexers, suitable for wavelength division multiplexing applications. In this paper we proposed an 8-channel optical demultiplexer based on photonic crystal ring resonator. For performing wavelength selection task we used eight ring resonators. The resonance wavelength of the ring resonators depends on the dimensions of the ring core, therefore we choose eight different values for the lattice constant of the ring resonators core section. The average channel spacing of the structure is about 3 nm the transmission efficiency in most of the channels is equal or more than 99 % except in one channels whose transmission efficiency is 85 %.
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Mansouri, Oualida El, e Amel Labbani. "Design and simulation of an enhanced optical demultiplexer using photonic crystal resonators". STUDIES IN ENGINEERING AND EXACT SCIENCES 5, n. 2 (29 agosto 2024): e7197. http://dx.doi.org/10.54021/seesv5n2-138.

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The purpose of this paper is to examine the design, simulation, and optimization of a demultiplexer optical system using photonic crystal resonators. Utilizing the distinct properties of photonic crystals, the proposed device achieves high-quality resonances, efficient wavelength separation, and minimal crosstalk. These characteristics are crucial for enhancing the performance of dense wavelength division multiplexing (DWDM) systems, which require precise and efficient channel separation to manage increasing data traffic. Extensive simulations conducted with the RSoft CAD tool explore the impact of varying resonator parameters such as refractive index, geometric dimensions, and material composition on the device's performance. The results indicate substantial improvements in transmission efficiency and quality factor, with average values of 98.675% and 3131.125, respectively. Furthermore, the ability to fine-tune these parameters allows for the customization of the demultiplexer to specific wavelength ranges, making it highly adaptable for various telecommunications applications. This research aims to propel the development of compact, high-performance photonic devices that meet the growing demands of modern communication networks, ultimately contributing to more efficient and reliable optical communication systems.
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Chen, S., D. Li, M. Wang e D. Wei. "Fabrication of a point defect photonic crystal based on diamond structure with a cavity and its microwave properties". Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 225, n. 11 (12 settembre 2011): 2071–77. http://dx.doi.org/10.1177/0954405411398760.

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This paper presents a novel fabrication method for three-dimensional (3D) ceramic point defect photonic crystals. The 3D defect photonic crystal, which possesses an air cavity, has been designed by cutting a rectangular shape (3.5 mm × 3.5 mm × 7 mm) in the centre of a photonic crystal with a diamond lattice structure model (50 mm × 30 mm × 20 mm) with a lattice constant of 7 mm. Stereolithography (SL) technology was applied to fabricate resin moulds with an inverse-diamond structure incorporating the defect, and high solid content aqueous ceramic slurry was prepared and injected into the moulds. After gel-casting, drying, and high-temperature sintering, ceramic 3D photonic crystals with intact structure and minimal shrinkage were obtained. The penetration of an electric field with resonant modes of about 3 mm into the host lattice was observed by measuring the <110> direction of the samples, which resulted from the rectangular air cavity resonator. The results show that this method can be used to fabricate ceramic 3D point defect photonic crystals with a complex 3D structure.
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Zhou, Jianhong, Da Mu, Jinhua Yang, Wenbo Han e Xu Di. "Coupled-resonator-induced transparency in photonic crystal waveguide resonator systems". Optics Express 19, n. 6 (28 febbraio 2011): 4856. http://dx.doi.org/10.1364/oe.19.004856.

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Fallahi, Vahid, e Mahmood Seifouri. "Design of a High-Quality Optical Filter Based on 2D Photonic Crystal Ring Resonator for WDM Systems". Journal of Optical Communications 41, n. 4 (28 aprile 2020): 355–61. http://dx.doi.org/10.1515/joc-2017-0218.

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AbstractIn this article, a 2D photonic crystal (PC)-based optical filter has been designed using a PC ring resonator. The resonator used is of square type with a square lattice constant, which has been designed by increasing the radius of the inner rods of the resonator. The filter designed can separate the light of the wavelength of 1545.3 nm with a transmission coefficient of 98 %. The bandwidth of the above wavelength is equal to 0.5 nm and hence the quality factor of the device at this wavelength is equal to 3091. The effects of the structural parameters, such as the refractive index, the lattice constant, the radius of the dielectric rods, the radius of the inner rods of the resonator on the behavior of the proposed device, are fully investigated. To obtain the photonic band gap, the plane wave expansion method is used. In addition, the finite difference time domain method is used to examine, simulate, and to obtain the output spectrum of the structure. The designed structure has both high transmission coefficient and quality factor. Comparatively speaking, it is also simple to design which justifies its use in other photonic crystal-based optical devices.
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Ozturk, Birol, Ozgur Yavuzcetin e Srinivas Sridhar. "A Novel Coupled Resonator Photonic Crystal Design in Lithium Niobate for Electrooptic Applications". International Journal of Optics 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/426569.

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High-aspect-ratio photonic crystal air-hole fabrication on bulk Lithium Niobate (LN) substrates is extremely difficult due to its inherent resistance to etching, resulting in conical structures and high insertion losses. Here, we propose a novel coupled resonator photonic crystal (CRPC) design, combining a coupled resonator approach with that of Bragg gratings. CRPC design parameters were optimized by analytical calculations and FDTD simulations. CRPC structures with optimized parameters were fabricated and electrooptically tested on bulk LN annealed proton exchange waveguides. Low insertion loss and large electrooptic effect were observed with the fabricated devices, making the CRPC design a promising structure for electrooptic device applications.
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20

Zhang, Yong, Cheng Zeng, Danping Li, Ge Gao, Zengzhi Huang, Jinzhong Yu e Jinsong Xia. "High-quality-factor photonic crystal ring resonator". Optics Letters 39, n. 5 (25 febbraio 2014): 1282. http://dx.doi.org/10.1364/ol.39.001282.

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Altug, Hatice, e Jelena Vučković. "Two-dimensional coupled photonic crystal resonator arrays". Applied Physics Letters 84, n. 2 (12 gennaio 2004): 161–63. http://dx.doi.org/10.1063/1.1639505.

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Zimmermann, J., B. K. Saravanan, R. März, M. Kamp, A. Forchel e S. Anand. "Large dispersion in photonic crystal waveguide resonator". Electronics Letters 41, n. 7 (2005): 414. http://dx.doi.org/10.1049/el:20057366.

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Li, L., e G. Q. Liu. "Photonic crystal ring resonator channel drop filter". Optik - International Journal for Light and Electron Optics 124, n. 17 (settembre 2013): 2966–68. http://dx.doi.org/10.1016/j.ijleo.2012.09.012.

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Yan, Chao, Yuhao Huang, Zhi-Yuan Li e Wenyao Liang. "Controllable Pseudospin Topological Add-Drop Filter Based on Magnetic–Optical Photonic Crystals". Nanomaterials 14, n. 11 (23 maggio 2024): 919. http://dx.doi.org/10.3390/nano14110919.

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Abstract (sommario):
We propose a controllable topological add-drop filter based on magnetic–optical photonic crystals. This add-drop filter is composed of two straight waveguides and a hexagonal photonic crystal ring resonator. The waveguide and ring resonator are constructed by three different honeycomb magnetic–optical photonic crystals. The expanded lattice is applied with an external magnetic field so that it breaks time-reversal symmetry and the analogous quantum spin Hall effect simultaneously. While the standard one and the compressed one are not magnetized and trivial, the straight waveguide supports pseudospin-down (or pseudospin-up) one-way states when the expanded lattice is applied with an external magnetic field of +H (or −H). The ring resonator possesses multiple resonant modes which can be divided into travelling modes and standing modes. By using the travelling modes, we have demonstrated the function of the add-drop filter and realized the output port control by changing the direction of the magnetic field. Moreover, a large tunable power ratio from near 0 to 52.6 is achieved by adjusting the strength of the external magnetic field. The structure has strong robustness against defects due to the topological protection property. These results have potential in wavelength division multiplexing systems and integrated topological optical devices.
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Mostafa, Tamer S., Shaimaa A. Kroush e El Sayed M. El Rabaie. "Photonic Crystal Circuitry and its Impact on Wireless Networks". International Journal of Wireless and Ad Hoc Communication 6, n. 1 (2023): 63–75. http://dx.doi.org/10.54216/ijwac.060106.

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Wireless networks are considered a hot topic in dealing with data without need to routers or other infrastructures. Each node has a part of routing responsibility. This result to a huge of data in forwarding to other nodes and will need high speed to process. Photonic crystal applications come to solve the necessity for such speed with small circuitry area. One of the main factors that affect their operation is the structure topology. Ring resonator, cavity based structures, self-collimation, and waveguide approaches are some of these topologies. OR gate is proposed in this paper to be simulated and evaluated as one of the basic element block. This design is built on a square lattice- photonic crystal construction on a ring resonator basis. Rotation of 90, 180, and 270 degrees are applied in clockwise direction. Sensitivity analysis, and carefully rod locations are considered to obtain remarkable performance. Minimum size and highly data rate are two characteristics that discriminates this design. The minimum size of 51.48 μm2 is obtained. The bit rates of 1.35, 6.35, 3.2, and 2.53 Tbs are calculated with the 0, 90, 180, and 270 degrees, respectively. Comparison table is well organized for the recently published photonic crystal OR-gate that based on ring resonator. Finite difference time domain and Plan wave expansion method are used to analyze the proposed structure at 1.55μm wavelength to verify OR- gate operation.
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26

de Almeida, Léo César, Fabio B. de Sousa, Waldomiro Paschoal Jr. e Marcos Costa. "2D FDTD Electromagnetic Simulation of an Ultracompact All Optical Logic Gate Based on 2D Photonic Crystal for Ultrafast Applications". Journal of Communication and Information Systems 39, n. 2024 (2 febbraio 2024): 35–45. http://dx.doi.org/10.14209/jcis.2024.4.

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In this paper, the concept of photonic crystals (PhCs) is fundamental to designing and simulating an all-optical logic gate device. We proposed an all-optical switch composed of two-dimensional (2D) photonic crystal waveguides with a central photonic crystal ring resonator (PCRR). The new all-optical NAND logic gate device comprises two linear waveguides coupled to each other through a single compact PCRR. The plane wave expansion (PWE) and finite-difference time-domain (FDTD) methods are applied to simulate the properties of the system. The structure is implemented on the operational wavelength of 1700 nm on an air wafer of only 12 μm × 12 μm. Indeed, the simulation results show that the proposed all-optical NAND gate is a strong candidate for ultrafast photonic integrated circuits (PICs) for applications in optical communications, being advantageous with high transmitting power, with simple design, and without the use of optical amplifiers and nonlinear materials.
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27

Wu, Ji Jiang, e Jin Xia Gao. "Analysis of Position-Dependent Extraordinary Optical Properties in Near-Zero-Permittivity Range for a One-Dimensional Superconducting Photonic Crystal". Applied Mechanics and Materials 401-403 (settembre 2013): 929–32. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.929.

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The position-dependent extraordinary optical properties in near-zero-permittivity range for a one-dimensional superconducting photonic crystal consisting of alternating superconductor and dielectric layers are theoretically investigated by using the transfer matrix method. Based on the calculated reflectance spectrum, it is shown the extraordinary optical propriety depends on the relative position between the threshold wavelength and the photonic band gap. By suitably choosing the thickness of the superconducting or dielectric layer, one can design a transmission narrowband filter or resonator to satisfy their needs without introducing any physical defect in a superconducting photonic crystal.
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28

Choi, Jihoon, e Heeso Noh. "Single-Port Coherent Perfect Loss in a Photonic Crystal Nanobeam Resonator". Nanomaterials 11, n. 12 (20 dicembre 2021): 3457. http://dx.doi.org/10.3390/nano11123457.

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We numerically demonstrated single-port coherent perfect loss (CPL) with a Fabry–Perot resonator in a photonic crystal (PC) nanobeam by using a perfect magnetic conductor (PMC)-like boundary. The CPL mode with even symmetry can be reduced to a single-port CPL when a PMC boundary is applied. The boundary which acts like a PMC boundary, here known as a PMC-like boundary, and can be realized by adjusting the phase shift of the reflection from the PC when the wavelength of the light is within the photonic bandgap wavelength range. We designed and optimized simple Fabry–Perot resonator and coupler in nanobeam to get the PMC-like boundary. To satisfy the loss condition in CPL, we controlled the coupling loss in the resonator by modifying the lattice constant of the PC used for coupling. By optimizing the coupling loss, we achieved zero reflection (CPL) in a single port with a PMC-like boundary.
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29

Shen, Guansheng, Huiping Tian e Yuefeng Ji. "Ultracompact ring resonator microwave photonic filters based on photonic crystal waveguides". Applied Optics 52, n. 6 (13 febbraio 2013): 1218. http://dx.doi.org/10.1364/ao.52.001218.

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30

Liu, Cheng-Yang. "Tunable ultracompact electro-optical photonic crystal ring resonator". Journal of Modern Optics 60, n. 16 (20 settembre 2013): 1337–42. http://dx.doi.org/10.1080/09500340.2013.837979.

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31

Mallika, C. S., Indira Bahaddur, P. C. Srikanth e Preeta Sharan. "Photonic crystal ring resonator structure for temperature measurement". Optik 126, n. 20 (ottobre 2015): 2252–55. http://dx.doi.org/10.1016/j.ijleo.2015.05.123.

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32

KIM, Myung Ki, e Yong Hee LEE*. "Microfiber-coupled Reconfigurable High-Q Photonic Crystal Resonator". New Physics: Sae Mulli 60, n. 5 (31 maggio 2010): 471–78. http://dx.doi.org/10.3938/npsm.60.471.

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33

Nunes, P. S., N. A. Mortensen, J. P. Kutter e K. B. Mogensen. "Photonic crystal resonator integrated in a microfluidic system". Optics Letters 33, n. 14 (14 luglio 2008): 1623. http://dx.doi.org/10.1364/ol.33.001623.

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34

Kim, Ju-Young, Myung-Ki Kim, Min-Kyo Seo, Soon-Hong Kwon, Jong-Hwa Shin e Yong-Hee Lee. "Two-dimensionally relocatable microfiber-coupled photonic crystal resonator". Optics Express 17, n. 15 (15 luglio 2009): 13009. http://dx.doi.org/10.1364/oe.17.013009.

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35

Lo, Stanley M., Shuren Hu, Girija Gaur, Yiorgos Kostoulas, Sharon M. Weiss e Philippe M. Fauchet. "Photonic crystal microring resonator for label-free biosensing". Optics Express 25, n. 6 (16 marzo 2017): 7046. http://dx.doi.org/10.1364/oe.25.007046.

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36

Xu, Biaogang, Dengguo Zhang, Yong Wang e Wenlong He. "A Millimeter-Wave Y-Shaped Circulator Based on Magneto Photonic Crystals". Journal of Nanoelectronics and Optoelectronics 17, n. 10 (1 ottobre 2022): 1366–69. http://dx.doi.org/10.1166/jno.2022.3315.

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In this paper, a millimeter-wave Y-shaped circulator based on magneto photonic crystals is demonstrated. The triangular lattice photonic crystal with Y-shaped line defect waveguide is constructed by Al2O3 ceramic posts. The magneto-optical cavity resonator in the junction of Y-shaped waveguide consists of two cylindrical ferrites and two triangular metal pedestals. The transmission characteristics of the circulator experimented under the external magnetic bias H0 = 300 Gs. In working frequency range 24∼28 GHz the isolation of circulator is better than 20 dB, and the best insertion loss is as low as 0.2 dB. The experimented results are well agreed with the simulation results.
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37

Mankotia, Amit, e Anil Kumar Shukla. "Detection of Vitiligo Using Optical Sensor Based on 2-D Photonic Crystals". Journal of Physics: Conference Series 2426, n. 1 (1 febbraio 2023): 012020. http://dx.doi.org/10.1088/1742-6596/2426/1/012020.

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Abstract This structure proposes the creation of the optical biosensor that can be used to detect vitiligo caused to pigment loss. For accomplishing this, a pair of 2-D photonic crystal structures, such as the K3 and K7 resonators, are examined. The study of both resonator structures is succeeded using (FDTD) Finite Difference Time Domain. The Lumerical simulation tool is used to model these structures in the Finite Difference Time Domain (FDTD). The subsequent optical properties of different pigmentation in human skin are investigated, and the refractive indexes information are entered into Lumerical (FDTD) to find variations in the refractive indexes of several pigments that produce vitiligo.
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38

Shi, Bingyao, Xiao Chen, Yuanyuan Cai, Qi Kang e Yiquan Wang. "Photonic crystal concentric dual-microring resonator for refractive index sensing". Journal of the Optical Society of America B 40, n. 9 (23 agosto 2023): 2462. http://dx.doi.org/10.1364/josab.496822.

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A high-performance photonic crystal (PhC) concentric dual-microring resonator (PhCCDMRR) for refractive index sensing is proposed in this paper. It confines the energy into PhC air holes to enhance the light–matter interaction, and the increased modal area of the concentric rings improves the sensing sensitivity. The slow-light effect near the photonic bandgap results in a PhC waveguide with a maximum group index of 18.2. In the transmission spectrum, a high extinction ratio of 22 dB is achieved. This sensor obtains a refractive index (RI) sensitivity of 265 nm/RIU (RI unit) using sodium chloride solution as samples, which has promising applications in RI sensing.
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39

Naghizade, S., e S. M. Sattari-Esfahlan. "Loss-Less Elliptical Channel Drop Filter for WDM Applications". Journal of Optical Communications 40, n. 4 (25 ottobre 2019): 379–84. http://dx.doi.org/10.1515/joc-2017-0088.

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Abstract In this paper, we proposed optical filter based on two-dimensional photonic crystal elliptical channel for wavelength division multiplexing. We employed ring resonator with ellipse shaped core in proposed structure. The resonance wavelength of the ring resonators depends on two parameters: refractive index and radius of dielectric rods. We investigate the physical parameters governing the filter performance. Our results show that the transmission efficiency is 100 % due to nearly zero reflection and loss in channel. Band width of 4 nm and quality factor of 389 is obtained for filter. Also, the total footprint of proposed structure is 230.4 µm2 which makes it suitable for all optical integrated circuits.
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40

Saini, Jasmine, Ajay Kumar e Amit Kumar Goyal. "Performance Analysis of Chirped Graded Photonic Crystal Resonator for Biosensing Applications". Photonics 11, n. 12 (13 dicembre 2024): 1173. https://doi.org/10.3390/photonics11121173.

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In this manuscript, a chirped graded photonic crystal (PhC) resonator structure is optimized for biosensing applications. The proposed structure comprises a bilayer PhC with an aqueous defect layer, where the thickness grading within the material is introduced, considering alpha (α) as a grading parameter. The device performance is analytically evaluated using the finite element method (FEM). The impact of α, the resonator thickness, and the incidence angle on the device performance is analyzed. Further, the device’s ability to be used as a biosensor is evaluated, considering cholesterol as an analyte. The analytical results demonstrate an average sensitivity of 410 nm/RIU, a quality factor of 0.91 × 103, and a figure of merit (FOM) of 2.47 × 102RIU−1, showing 88.5% and 43% improvements in sensitivity and FOM compared to recently reported devices. The device’s superior sensing performance makes it suitable for medical and commercial applications, while the use of thickness grading addresses fabrication limitations, offering a robust framework for advanced photonic device design.
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41

Liheng, Wu, Wang Minghong e Meng Xianzhu. "Wavelength division demultiplexing characteristics of photonic crystal square resonator". Journal of Applied Optics 39, n. 1 (2018): 150–54. http://dx.doi.org/10.5768/jao201839.0108002.

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42

Kim, Woo Jun, Wan Kuang e John O'Brien. "Dispersion characteristics of photonic crystal coupled resonator optical waveguides". Optics Express 11, n. 25 (15 dicembre 2003): 3431. http://dx.doi.org/10.1364/oe.11.003431.

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43

Wu Liheng, 吴立恒, e 王明红 Wang Minghong. "Photonic Crystal Optical Signal Splitter Based on Micro Resonator". Laser & Optoelectronics Progress 55, n. 3 (2018): 031301. http://dx.doi.org/10.3788/lop55.031301.

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44

Benmerkhi, A., M. Bouchemat e T. Bouchemat. "Computational Study of Photonic Crystal Resonator for Biosensor Application". Frequenz 73, n. 9-10 (25 settembre 2019): 307–16. http://dx.doi.org/10.1515/freq-2019-0025.

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Abstract A two dimensional photonic crystal biosensor with high quality factor, transmission and sensitivity has been theoretically investigated using two dimensional finite difference time domain method (FDTD) and plane-wave expansion (PWE) approach. The studied biosensor consisted of two waveguide couplers and one microcavity formed by removing one air pore. Following analyte injection into the sensing holes and binding, the refractive index changes inducing a possible shift in the resonant wavelength. For the optimized structure, the biosensor quality factor is found to be over 49,767 and the obtained sensitivity is of order 15.2 nm/fg. Also, we investigated this structure in case of all air holes are applied as the functionalized holes with a sensitivity was found to be approximately equal to 292.46 nm∕RIU (refractive index units). According to the resonance cavity characteristics, the demultiplexing of different wavelengths can be achieved by regulating the radius of defects “r” inside the cavity. For this, A new design with 2D PCs for two-channel demultiplexer optofluidic biosensor has been proposed. The analysis shows that the response of each channel has a different resonant cavity wavelength and the filling of analyte in the selected holes cause resonant wavelength shifting, independently.
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45

Dezfouli, Mohsen Kamandar, e Marc M. Dignam. "Large mode-volume, large beta, photonic crystal laser resonator". AIP Advances 4, n. 12 (dicembre 2014): 123003. http://dx.doi.org/10.1063/1.4897523.

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46

Hsiao, Fu-Li, e Chengkuo Lee. "Novel Biosensor Based on Photonic Crystal Nano-Ring Resonator". Procedia Chemistry 1, n. 1 (settembre 2009): 417–20. http://dx.doi.org/10.1016/j.proche.2009.07.104.

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47

Rajasekar, R., K. Parameshwari e S. Robinson. "Nano-optical Switch Based on Photonic Crystal Ring Resonator". Plasmonics 14, n. 6 (21 maggio 2019): 1687–97. http://dx.doi.org/10.1007/s11468-019-00955-4.

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48

Nikoufard, Mahmoud, e Masoud Kazemi Alamouti. "High-bandwidth photonic-crystal-based ring resonator pin modulator". Optik 136 (maggio 2017): 172–80. http://dx.doi.org/10.1016/j.ijleo.2017.01.111.

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49

Jeong, Chang Yeong, Chang-Koo Kim e Sangin Kim. "Slot-embedded photonic-crystal resonator with enhanced modal confinement". Optics Letters 40, n. 4 (9 febbraio 2015): 554. http://dx.doi.org/10.1364/ol.40.000554.

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50

Mingaleev, Sergei F., Andrey E. Miroshnichenko e Yuri S. Kivshar. "Coupled-resonator-induced reflection in photonic-crystal waveguide structures". Optics Express 16, n. 15 (18 luglio 2008): 11647. http://dx.doi.org/10.1364/oe.16.011647.

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