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Готові списки джерел за темами / Junction of waveguides / Статті в журналах

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Статті в журналах з теми "Junction of waveguides"

Автор: Grafiati

Опубліковано: 26 січня 2024

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1

Berdnik, Sergey L., Victor A. Katrich, Mikhail V. Nesterenko, and Yuriy M. Penkin. "Waveguide T-junctions with resonant coupling between sections of different dimensions." International Journal of Microwave and Wireless Technologies 9, no. 5 (November 23, 2016): 1059–65. http://dx.doi.org/10.1017/s175907871600129x.

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Electromagnetic characteristics of the E-plane T-junction for two rectangular waveguides using resonant coupling between the waveguide sections were studied by mathematical modeling. The problem of coupling between infinite and semi-infinite rectangular waveguides through a resonant slot in the end-wall of the semi-infinite waveguide in the presence of resonant monopole is solved in a strict electrodynamic formulation. The monopole with variable surface impedance is placed parallel to the narrow walls at an arbitrary position inside the infinite waveguide. The problem is solved analytically by the generalized method of induced electro-magneto-motive forces. Impedance vibrator inclusions with variable electro-physical parameters have been analyzed as control elements for waveguide junctions. To this purpose energy characteristics of the junction in the single-mode regime of the both waveguides, and also in multi-mode regime of the semi-infinite waveguide is investigated. The results may be useful for development of variety antennas and waveguide devices, which involves waveguide junctions.

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2

Pochernyaev, V. N., and N. M. Syvkova. "EXTERNAL PARAMETERS OF THE CONNECTION OF A RECTANGULAR WAVEGUIDE PARTIALLY FILLED OF LINEAR DIELECTRIC WITH A RECTANGULAR WAVEGUIDE PARTIALLY FILLED OF NONLINEAR DIELECTRIC." Visnyk Universytetu “Ukraina”, no. 1 (28) 2020 (2020): 100–105. http://dx.doi.org/10.36994/2707-4110-2020-1-28-09.

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. In the article, the external parameters of the connection of a rectangular waveguide partially filled of linear dielectric with a rectangular waveguide partially filled of a nonlinear dielectric are determined. Knowledge of the external parameters of such a connection ensures the design of devices with open nonlinear elements. Promising microwave paths of radio engineering systems based on rectangular waveguides partially filled of dielectric include a wide variety of active and passive microwave devices. The plane-transverse junction of these waveguides is considered for various geometric dimensions of dielectric plates and their relative permittivity. Such a junction is characterized by reactive conductivity, which is determined through the sum of the reactive conductivities of local fields. The transverse electric field at the junction is represented through the eigenvector function of the geometric surface, which coincides with the cross section of the waveguides. The scattering matrix of the plane-transverse junction is determined through the conductivity of the sections of the two waveguides and the conductivity of the plane-transverse junction. The dependences of the traveling wave coefficient and the modulus of the reflection coefficient on the geometric dimensions of the dielectric plate are plotted taking into account the local fields generated at the plane transverse junction. At the junction of two waveguides, not only changed the geometric dimensions of the dielectric plates along the wide and narrow walls of the waveguide, but also their relative permittivity. In one case, two higher types of waves were taken into account: quasi - H30 and quasi - H12, in the other case - four higher types of waves: quasi - H30, quasi - H12, quasi - E12, quasi - H50. Calculations show that an increase in the number of higher types of waves has practically no effect on the accuracy of calculations. The results obtained indicate the rapid internal convergence of the obtained solutions and the correct choice of the transverse electric eigenvector function of rectangular waveguides partially filled of dielectric as approximate the field on the junction of two waveguides.

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3

Ishibashi, Akira, Tsuyoshi Kasai, and Nobuo Sawamura. "Redirection Waveguide having Discrete Translational Symmetry for Photovoltaic Systems with Solar-Cell Units Placed at the Periphery." Energies 11, no. 12 (December 14, 2018): 3498. http://dx.doi.org/10.3390/en11123498.

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We have investigated a new type of redirection waveguides for concentration solar-cell systems. The solar cell units are to be placed in the peripheral region of the waveguide. The redirection waveguide converts three-dimensionally propagating (3D) photons into 2D photons that propagate in a planar waveguide which serves as the mainstream of the redirection waveguide. In this new type, the cladding layer on one side of the planar waveguide, not being spatially continuous, tangentially touches the core of the planar waveguide which, having an open geometry, is connected, through tributary waveguides, to the bottom plane where the 3D-photons come in vertically. Based on simulations, we have shown not only that good mainstream-to-mainstream propagation of light-wave can be obtained but also that the light propagation from the tributary waveguides to the mainstream is well done. We also have confirmed that light-waves from the tributary waveguides are well merged with those from the mainstream waveguide at the junction of the cores of the mainstream and the tributary waveguides. Light-waves injected from tributary waveguides propagates well in the core of the mainstream waveguide passing those junctions. The light-wave merging can be fulfilled in the waveguide with the discrete translational symmetry. Photons are shown to be well conveyed in the new waveguide losslessly for a distance of ~1 mm. The redirection waveguide is promising for the concentration photovoltaic systems with solar-cell units placed at its periphery.

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4

Koala, Ratmalgre, Ryoma Maru, Kei Iyoda, Li Yi, Masayuki Fujita, and Tadao Nagatsuma. "Ultra-Low-Loss and Broadband All-Silicon Dielectric Waveguides for WR-1 Band (0.75–1.1 THz) Modules." Photonics 9, no. 8 (July 24, 2022): 515. http://dx.doi.org/10.3390/photonics9080515.

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This study presents ultra-low-loss and broadband all-silicon dielectric waveguides for the WR-1 band (0.75–1.1 THz). The waveguides are built in high-resistivity silicon (10 kΩ-cm) and integrated with supportive frames fabricated from the same silicon wafer in a single etch process to achieve a compact design. We pursued low-loss, broadband, substrateless, unclad and effective medium waveguides. Smaller propagation losses of 0.3 dB/cm and 0.1 dB/cm were achieved for the unclad and effective medium waveguides, respectively. The 3 dB bandwidth was not encountered in the frequency range of interest and was as broad as 350 GHz. An unclad waveguide was employed to devise a Y-junction to demonstrate its practical applications in terahertz imaging. An integrated circuit card was successfully scanned. In addition, we developed unclad waveguide, effective medium waveguide, and Y-junction modules. The modules incorporated an input/output interface compatible with a standard WR-1 flange (254 μm × 127 μm). Unlike the conventional hollow waveguide modules, the unclad waveguide and effective medium waveguide modules reported total loss improvements of 6 dB and 8 dB, respectively, across the operation band. Our results provided a systematic way of achieving low-loss, compact, and versatile modules in the WR-1 band based on all-dielectric-waveguide platforms.

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5

Belubekyan, M. V., and S. L. Sahakyan. "ON THE LOCALIZATION OF SHEAR VIBRATIONS IN A COMPOSITE ELASTIC SEMI-INFINITE FLAT WAVEGUIDE." Proceedings of the YSU A: Physical and Mathematical Sciences 54, no. 1 (251) (April 15, 2020): 44–49. http://dx.doi.org/10.46991/pysu:a/2020.54.1.044.

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Анотація:

In this paper we consider semi-infinite flat waveguides with different boundary conditions on the planes and on the edges that bound the waveguide. The possibility of localizing shear waves in the vicinity of the junction of neighbouring parts of a semi-infinite flat waveguide is established.

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6

D. V. Divakov, K.P. Lovetskiy, A. L. Sevastyanov, and A. A. Tiutiunnik. "Adiabatic guided modes of a three-layer integral optical waveguide." Technical Physics 68, no. 4 (2023): 423. http://dx.doi.org/10.21883/tp.2023.04.55931.292-22.

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The numerical solution of the problem of guided propagation of polarized light in a smooth junction of a planar waveguide is considered. Within the framework of the model of adiabatic guided modes, the system of Maxwell equations is reduced to a system of four ordinary differential equations and two algebraic equations for six components of the electromagnetic field in the zeroth approximation and the same number of equations in the first approximation. The multilayer structure of waveguides makes it possible to reduce the problem to a homogeneous system of linear algebraic equations, whose nontrivial solvability condition yields the dispersion equation. Auxiliary eigenvalue problems for describing the adiabatic modes of the waveguide are solved. Keywords: smoothly irregular integrated-optical multilayer waveguides, eigenvalue and eigenvector problems, single-mode propagation of adiabatic waveguide modes.

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7

Eccleston, Kimberley, and Ian Platt. "Identifying Near-Perfect Tunneling in Discrete Metamaterial Loaded Waveguides." Electronics 8, no. 1 (January 11, 2019): 84. http://dx.doi.org/10.3390/electronics8010084.

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Mu-negative and epsilon-negative loaded waveguides taken on their own are nominally cut-off. In ideal circumstances, and when paired in the correct proportions, tunneling will occur. However, due to losses and constraints imposed by finite-sized constituent elements, the ability to experimentally demonstrate tunneling may be hindered. A tunnel identification method has been developed and demonstrated to reveal tunneling behavior that is otherwise obscured. Using ABCD (voltage-current transmission) matrix formulation, the S-parameters of the mu-negative/epsilon-negative loaded waveguide junction is combined with S-parameters of an epsilon-negative loaded waveguide. The method yields symmetric scattering matrices, which allows the effect of losses to be removed to provide yet clearer identification of tunneling.

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8

Nazarov, S. A., K. Ruotsalainen, and P. Uusitalo. "The Y-junction of quantum waveguides." ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik 94, no. 6 (March 18, 2013): 477–86. http://dx.doi.org/10.1002/zamm.201200255.

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9

KIM, JUN-HYONG, HOE-YOUNG YANG, and HYUN-YONG LEE. "FABRICATION OF MACH-ZEHNDER INTERFEROMETOR BASED ON PLANAR WAVEGUIDE FOR THE APPLICATION OF BIOSENSORS." International Journal of Modern Physics B 23, no. 06n07 (March 20, 2009): 1891–96. http://dx.doi.org/10.1142/s0217979209061792.

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In this paper, designed and simulated Power Splitter (PS) integrated Mach-Zehnder interferometer (MZI) based planar waveguide devices (which is called here a PS-MZI). Moreover, we fabricated optical waveguide based on the PS-MZI for application to the biosensor. The integrated optical structure is sensitive to refractive index change induced due to the interaction of the evanescent field with an immobilized biological sample placed on one of the two arms of the interferometer. The PS-MZI sensor was preceded by a Y -junction, which splits the input power between the sensor and a reference branch to minimize the effect of optical power variations. The waveguide were optimized at a wavelength of 1550 nm and fabricated according to the design rule of 0.45 delta%, which is the difference of refractive index between the core and clad. The fabrication of PS-MZI optical waveguides was performed by a conventional planar lightwave circuit (PLC) fabrication process. The PS-MZI optical waveguides were measured of the optical characteristics for the application of biosensors.

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10

Vu, Ngoc Hai, Thanh Tuan Pham, and Seoyong Shin. "Large Scale Spectral Splitting Concentrator Photovoltaic System Based on Double Flat Waveguides." Energies 13, no. 9 (May 9, 2020): 2360. http://dx.doi.org/10.3390/en13092360.

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In this research, we present a novel design for a large scale spectral splitting concentrator photovoltaic system based on double flat waveguides. The sunlight concentrator consists of a Fresnel lens array and double waveguides. Sunlight is firstly concentrated by Fresnel lenses then reaches an upper flat waveguide (UFW). The dichroic mirror-coated prisms are positioned at each focused area to divide the sunlight spectrum into two bands. The mid-energy (mid E) band is reflected at the prism surface and coupled to the UFW. The GaInP/GaAs dual-junction solar cell is attached at the exit port of the UFW to maximize the electrical conversion efficiency of the mid E band. The low-energy (low E) band is transmitted and reaches a bottom flat waveguide (BFW). The mirror coated prisms are utilized to redirect the mid E band sunlight for coupling with the BFW. The GaInAsP/GaInAs dual-junction solar cell is applied to convert the low E band to electricity. The system was modeled using the commercial optic simulation software LightTools™. The results show that the proposed system can achieve optical efficiencies of 84.02% and 80.01% for the mid E band and low E band, respectively, and a 46.1% electrical conversion efficiency for the total system. The simulation of the system performance and comparison with other PV systems prove that our proposed design is a new approach for a highly efficient photovoltaic system.

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11

Li, Shuxia, N. Garry Tarr, and Winnie N. Ye. "JFET Integration Using a Foundry SOI Photonics Platform." Applied Sciences 9, no. 19 (September 21, 2019): 3964. http://dx.doi.org/10.3390/app9193964.

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We explore the monolithic integration of conventional electronics with SOI photonics using the commercial silicon photonics foundry technology offered by A*STAR’s Institute of Microelectronics (IME). This process offers optical waveguide modulators and photodetectors, but was not intended to support transistors. We present the implementation of junction field effect transistors (JFETs) integrated with optical waveguides and photodetectors. A simple SPICE model is developed for the JFETs based on the available ion implant parameters, and the geometry feature size allowed by the technology’s layout rules. We have demonstrated the monolithic integration of photonics and electronics circuits. This work could be useful for application in waveguide sensors and optical telecommunications.

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12

Goldring, Damian, Evgeny Alperovich, Uriel Levy, and David Mendlovic. "Analysis of waveguide-splitter-junction in high-index Silicon-On-Insulator waveguides." Optics Express 13, no. 8 (2005): 2931. http://dx.doi.org/10.1364/opex.13.002931.

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13

Диваков, Д. В., К. П. Ловецкий, А. Л. Севастьянов та А. А. Тютюнник. "Адиабатические волноводные моды трехслойного интегрально оптического волновода". Журнал технической физики 93, № 4 (2023): 453. http://dx.doi.org/10.21883/jtf.2023.04.55031.292-22.

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Анотація:

The numerical solution of the problem of guided propagation of polarized light in a smooth junction of a planar waveguide is considered. Within the framework of the model of adiabatic guided modes, the system of Maxwell equations is reduced to a system of four ordinary differential equations and two algebraic equations for six components of the electromagnetic field in the zeroth approximation and the same number of equations in the first approximation. The multilayer structure of waveguides makes it possible to reduce the problem to a homogeneous system of linear algebraic equations, whose nontrivial solvability condition yields the dispersion equation. Auxiliary eigenvalue problems for describing the adiabatic modes of the waveguide are solved.

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14

Burton, R. S., T. E. Schlesinger, and M. Munowitz. "Improved Y-junction splitter for ring waveguides." Electronics Letters 30, no. 12 (June 9, 1994): 956–57. http://dx.doi.org/10.1049/el:19940656.

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15

Gentili, G. G., and A. Melloni. "Analysis of the X-junction between two rectangular waveguides and a circular waveguide." IEEE Microwave and Guided Wave Letters 7, no. 8 (1997): 245–47. http://dx.doi.org/10.1109/75.605492.

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16

Passoni, Marco, Dario Gerace, Liam O’Faolain, and Lucio Claudio Andreani. "Slow light with interleaved p-n junction to enhance performance of integrated Mach-Zehnder silicon modulators." Nanophotonics 8, no. 9 (May 30, 2019): 1485–94. http://dx.doi.org/10.1515/nanoph-2019-0045.

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AbstractSlow light is a very important concept in nanophotonics, especially in the context of photonic crystals. In this work, we apply our previous design of band-edge slow light in silicon waveguide gratings [M. Passoni et al, Opt. Express 26, 8470 (2018)] to Mach-Zehnder modulators based on the plasma dispersion effect. The key idea is to employ an interleaved p-n junction with the same periodicity as the grating, in order to achieve optimal matching between the electromagnetic field profile and the depletion regions of the p-n junction. The resulting modulation efficiency is strongly improved as compared to common modulators based on normal rib waveguides, even in a bandwidth of 20–30 nm near the band edge, while the total insertion loss due to free carriers is not increased. The present concept is promising in view of realizing slow-light modulators for silicon photonics with reduced energy dissipation.

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17

Zhang, H. Z. "A wideband orthogonal-mode junction using a junction of a quad-ridged coaxial waveguide and four ridged sectoral waveguides." IEEE Microwave and Wireless Components Letters 12, no. 5 (May 2002): 172–74. http://dx.doi.org/10.1109/7260.1000193.

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18

Гнатюк, М. А., В. М. Морозов, and С. В. Марченко. "Electromagnetic wave diffraction on rectangular waveguides cascaded junction." Radiotekhnika 1, no. 196 (March 31, 2019): 130–37. http://dx.doi.org/10.30837/rt.2019.1.196.16.

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19

Uusitalo, Pauliina. "The bound states of 3D Y-junction waveguides." Annales Academiae Scientiarum Fennicae Mathematica 40 (January 2015): 329–41. http://dx.doi.org/10.5186/aasfm.2015.4023.

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20

Ivanov, A. A., and V. V. Shevchenko. "A Planar transversal junction of two planar waveguides." Journal of Communications Technology and Electronics 54, no. 1 (January 2009): 63–72. http://dx.doi.org/10.1134/s1064226909010057.

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21

Rud', L. A. "E-plane T-junction of oversize rectangular waveguides." Radiophysics and Quantum Electronics 28, no. 2 (February 1985): 146–51. http://dx.doi.org/10.1007/bf01035057.

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22

Miura, Kenta, Yuki Machida, Masato Uehara, Hiromu Kiryu, Yusuke Ozawa, Tomoyuki Sasaki, Osamu Hanaizumi та ін. "Fabrication of Polymer Optical Waveguides for the 1.5-μm Band Using Focused Proton Beam". Key Engineering Materials 497 (грудень 2011): 147–50. http://dx.doi.org/10.4028/www.scientific.net/kem.497.147.

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Proton beam writing (PBW) has attracted much attention recently as a next-generation micro-fabrication technology. It is a direct-drawing technique and does not need any masks to transfer micro-patterns to sample surfaces. In addition, the refractive index of a poly (methyl methacrylate) (PMMA) can be increased by proton-beam irradiation. In this study, we fabricated the first 1.5-μm-band single-mode, straight-line waveguides and Y-junction waveguides consisting of PMMA layers using the PBW technique.

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23

Logacheva, L. M., S. V. Kutsak, and V. P. Bondarev. "EQUIVALENT SURFACE IMPEDANCE OF T-JUNCTION OF RECTANGULAR WAVEGUIDES." Telecommunications and Radio Engineering 74, no. 11 (2015): 971–80. http://dx.doi.org/10.1615/telecomradeng.v74.i11.20.

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24

Weissman, Z., D. Nir, S. Ruschin, and A. Hardy. "Asymmetric Y‐junction wavelength demultiplexer based on segmented waveguides." Applied Physics Letters 67, no. 3 (July 17, 1995): 302–4. http://dx.doi.org/10.1063/1.115425.

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25

McGurn, A. R. "Transmission through a nonlinear junction of photonic crystal waveguides." Journal of Physics: Condensed Matter 20, no. 2 (December 6, 2007): 025202. http://dx.doi.org/10.1088/0953-8984/20/02/025202.

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26

Miura, Kenta, Takahiro Satoh, Yasuyuki Ishii, Hiromu Kiryu, Yusuke Ozawa, Masashi Kohka, Katsuyoshi Takano, et al. "Fabrication of Mach-Zehnder Polymer Waveguides by a Direct-Drawing Technique Using a Focused Proton Beam." Key Engineering Materials 534 (January 2013): 158–61. http://dx.doi.org/10.4028/www.scientific.net/kem.534.158.

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Анотація:

Proton beam writing (PBW) has recently attracted much attention as a next-generation microfabrication technology. This is a direct-drawing technique and does not need any masks to transfer micropatterns to sample surfaces. In our previous work, we demonstrated the first single-mode straight-line and Y-junction PMMA-based waveguides fabricated using PBW and working at λ = 1.55 μm. In this work, we fabricated the first PMMA-based Mach-Zehnder waveguides for the wavelength utilizing PBW in order to construct thermo-optic switches.

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27

Zhang, H. Z. "Correction to "A wideband orthogonal mode junction using a junction of a quad-ridged coaxial waveguide and four ridged sectoral waveguides"." IEEE Microwave and Wireless Components Letters 12, no. 6 (June 2002): 226. http://dx.doi.org/10.1109/lmwc.2002.1010003.

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28

Shaaban, Adel, Yi-Chun Du, and Lotfy Rabeh Gomaa. "Extension of an FFT-Based Beam Propagation Method to Plasmonic and Dielectric Waveguide Discontinuities and Junctions." Applied Sciences 9, no. 20 (October 16, 2019): 4362. http://dx.doi.org/10.3390/app9204362.

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We adapted a fast Fourier transform-based Beam Propagation Method (FFT-BPM) to investigate waveguide discontinuities in plasmonic waveguides. The adaptation of the FFT-BPM to treat transverse magnetic (TM) fields requires the circumvention of two major difficulties: the mixed derivatives of the magnetic field and waveguide refractive index profile in the TM wave equation and the step-like index change at the transverse metal-dielectric boundary of the plasmonic guide and the transverse boundaries of the dielectric waveguide as well. An equivalent-index method is adopted to transform TM fields to transverse electric (TE) ones, thus enabling the benefit of the full power and simplicity of the FFT-BPM. Moreover, an appropriate smoothing function is used to approximate the step-like refractive index profile in the transverse direction. At the junction plane, we used an accurate combined spatial-spectral reflection operator to calculate the reflected field. To validate our proposed scheme, we investigated the modal propagation in a silicon waveguide terminated by air (like a laser facet in two cases: with and without a coating layer). Then we considered a subwavelength plasmonic waveguide (metal-insulator-metal MIM) butt-coupled with a dielectric waveguide, where the power transmission efficiency has been calculated and compared with other numerical methods. The comparison reveals good agreement.

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29

Atwater, Harry A., Stefan Maier, Albert Polman, Jennifer A. Dionne, and Luke Sweatlock. "The New “p–n Junction”: Plasmonics Enables Photonic Access to the Nanoworld." MRS Bulletin 30, no. 5 (May 2005): 385–89. http://dx.doi.org/10.1557/mrs2005.277.

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AbstractSince the development of the light microscope in the 16th century, optical device size and performance have been limited by diffraction. Optoelectronic devices of today are much bigger than the smallest electronic devices for this reason. Achieving control of light—material interactions for photonic device applications at the nanoscale requires structures that guide electromagnetic energy with subwavelength-scale mode confinement. By converting the optical mode into nonradiating surface plasmons, electromagnetic energy can be guided in structures with lateral dimensions of less than 10% of the free-space wavelength. A variety of methods—including electron-beam lithography and self-assembly—have been used to construct both particle and planar plasmon waveguides. Recent experimental studies have confirmed the strongly coupled collective plasmonic modes of metallic nanostructures. In plasmon waveguides consisting of closely spaced silver rods, electromagnetic energy transport over distances of 0.5 m has been observed. Moreover, numerical simulations suggest the possibility of multi-centimeter plasmon propagation in thin metallic stripes. Thus, there appears to be no fundamental scaling limit to the size and density of photonic devices, and ongoing work is aimed at identifying important device performance criteria in the subwavelength size regime. Ultimately, it may be possible to design an entire class of subwavelength-scale optoelectronic components (waveguides, sources, detectors, modulators) that could form the building blocks of an optical device technology—a technology scalable to molecular dimensions, with potential imaging, spectroscopy, and interconnection applications in computing, communications, and chemical/biological detection.

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30

Rodini, Sandra, Simone Genovesi, Giuliano Manara, and Filippo Costa. "EBG waveguides for contactless surface impedance measurements." Journal of Physics: Conference Series 2015, no. 1 (November 1, 2021): 012030. http://dx.doi.org/10.1088/1742-6596/2015/1/012030.

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Abstract A method for the estimation of sheet impedance of thin sample which does not require a direct contact with the sample under test is proposed. The surface impedance is calculated through an inversion procedure exploiting the scattering parameters obtained through a waveguide measurement setup. An inversion procedure based on the representation of the waveguide-air-waveguide section as a π junction is employed. In order to prevent the field leakage from the air gap created for hosting the thin sheet, an EBG surface is introduced on the flange of the waveguide. It is shown that the introduction of the EBG surface remarkably improves the estimation of the surface impedance of the thin sheet with respect to the case without EBG.

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31

Dhia, Anne-Sophie Bonnet-Ben, Benjamin Goursaud, and Christophe Hazard. "Mathematical Analysis of the Junction of Two Acoustic Open Waveguides." SIAM Journal on Applied Mathematics 71, no. 6 (January 2011): 2048–71. http://dx.doi.org/10.1137/100811374.

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32

Min-Cheol Oh, Hyung-Jong Lee, Myung-Hyun Lee, Joo-Heon Ahn, and Seon Gyu Han. "Asymmetric X-junction thermooptic switches based on fluorinated polymer waveguides." IEEE Photonics Technology Letters 10, no. 6 (June 1998): 813–15. http://dx.doi.org/10.1109/68.681493.

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33

Lin, Xu-Sheng, Jing-Lin Liu, Yun-Bao Zheng, and Sheng Lan. "Modulation of Junction Defects Created by Crossing Photonic Crystal Waveguides." Chinese Physics Letters 31, no. 1 (January 2014): 014206. http://dx.doi.org/10.1088/0256-307x/31/1/014206.

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34

Shevchenko, V. V. "The theory of a plane transverse junction of open waveguides." Journal of Communications Technology and Electronics 53, no. 1 (January 2008): 52–59. http://dx.doi.org/10.1134/s1064226908010063.

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35

Strizhachenko, A. V., and S. N. Shul’ga. "Resonance phenomena in a junction of cylindrical and rectangular waveguides." Journal of Communications Technology and Electronics 55, no. 5 (May 2010): 535–37. http://dx.doi.org/10.1134/s1064226910050098.

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36

Ginsberg, Jerry H. "Collocation analysis of junction conditions for waveguides at high-frequencies." Journal of the Acoustical Society of America 133, no. 5 (May 2013): 3545. http://dx.doi.org/10.1121/1.4806421.

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37

Malishevskii, A. S., V. P. Silin, S. A. Uryupin, and S. G. Uspenskii. "Vortices in a Josephson junction sandwiched between two superconducting waveguides." Physics of the Solid State 46, no. 9 (September 2004): 1591–603. http://dx.doi.org/10.1134/1.1799172.

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38

Erickson, John R., Nicholas A. Nobile, Daniel Vaz, Gouri Vinod, Carlos A. Ríos Ocampo, Yifei Zhang, Juejun Hu, Steven A. Vitale, Feng Xiong, and Nathan Youngblood. "Comparing the thermal performance and endurance of resistive and PIN silicon microheaters for phase-change photonic applications." Optical Materials Express 13, no. 6 (May 17, 2023): 1677. http://dx.doi.org/10.1364/ome.488564.

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Анотація:

Optical phase-change materials have enabled nonvolatile programmability in integrated photonic circuits by leveraging a reversible phase transition between amorphous and crystalline states. To control these materials in a scalable manner on-chip, heating the waveguide itself via electrical currents is an attractive option which has been recently explored using various approaches. Here, we compare the heating efficiency, fabrication variability, and endurance of two promising heater designs which can be easily integrated into silicon waveguides—a resistive microheater using n-doped silicon and one using a silicon p-type/intrinsic/n-type (PIN) junction. Raman thermometry is used to characterize the heating efficiencies of these microheaters, showing that both devices can achieve similar peak temperatures but revealing damage in the PIN devices. Subsequent endurance testing and characterization of both device types provide further insights into the reliability and potential damage mechanisms that can arise in electrically programmable phase-change photonic devices.

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39

De Nittis, G., M. Moscolari, S. Richard, and R. Tiedra de Aldecoa. "Spectral and scattering theory of one-dimensional coupled photonic crystals." Reviews in Mathematical Physics 33, no. 08 (May 28, 2021): 2150027. http://dx.doi.org/10.1142/s0129055x21500276.

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We study the spectral and scattering theory of light transmission in a system consisting of two asymptotically periodic waveguides, also known as one-dimensional photonic crystals, coupled by a junction. Using analyticity techniques and commutator methods in a two-Hilbert spaces setting, we determine the nature of the spectrum and prove the existence and completeness of the wave operators of the system.

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40

Delitsyn, A. L. "Finite-element methods for junction problems for coaxial and radial waveguides." Moscow University Physics Bulletin 71, no. 4 (July 2016): 368–74. http://dx.doi.org/10.3103/s0027134916040068.

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41

Shahid, Naeem, Muhammad Amin, Shagufta Naureen, Marcin Swillo, and Srinivasan Anand. "Junction-type photonic crystal waveguides for notch- and pass-band filtering." Optics Express 19, no. 21 (October 7, 2011): 21074. http://dx.doi.org/10.1364/oe.19.021074.

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42

Gimeno, B., and M. Guglielmi. "Multimode equivalent network representation for the Y-junction of rectangular waveguides." IEE Proceedings - Microwaves, Antennas and Propagation 144, no. 3 (1997): 161. http://dx.doi.org/10.1049/ip-map:19971150.

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43

Ivanov, A. A., and V. V. Shevchenko. "A transverse displacement at the junction of two planar dielectric waveguides." Journal of Communications Technology and Electronics 55, no. 7 (July 2010): 745–48. http://dx.doi.org/10.1134/s106422691007003x.

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44

Yang, Wu, Xiaoshuang Chen, Xiaoyan Shi, and Wei Lu. "Design of a high transmission Y-junction in photonic crystal waveguides." Physica B: Condensed Matter 405, no. 7 (April 2010): 1832–35. http://dx.doi.org/10.1016/j.physb.2010.01.056.

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45

Berdnik, S., V. Katrich, M. Nesterenko, and Yu Penkin. "E-plane rectangular waveguides junction with vibrator-slot coupling between shoulders." RADIOFIZIKA I ELEKTRONIKA 20, no. 1 (March 10, 2015): 85–93. http://dx.doi.org/10.15407/rej2015.01.085.

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46

BELHADI, M., and A. KHATER. "MAGNONS TRANSMISSION THROUGH AN ATOMIC WIRE CONNECTING TWO ULTRATHIN HEISENBERG FERROMAGNETS." Surface Review and Letters 16, no. 01 (February 2009): 55–63. http://dx.doi.org/10.1142/s0218625x09012299.

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The magnons transport properties of molecular wires connecting two Heisenberg ferromagnets are studied within the framework of the matching method and with use of a realistic atomic structure. The model system consists of two nanostructured ferromagnetic films on either side of the junction and the atomic wire consists of a linear molecule connecting two ultrathin solid ferromagnetic films. A theoretical model is presented for the study of the transmission and the reflection of spin waves at the atomic wire junction. The calculation was made at the atomic scale for two identical waveguides with ordered spins and coupled by Heisenberg exchange interaction between first neighbors. Our analysis yields a detailed understanding of the spin-wave coherent scattering at the linear molecular junction. We calculate, in particular, the coherent reflection R and transmission T coefficients, which constitute the elements of the scattering matrix in accordance with the Landauer–Büttiker scattering formalism, as well as the magnon transmittance of the atomic wire for spin-waves incident from the interior of the film on the junction. The most representative numerical results obtained for the system of two slabs made up of three Fe ferromagnetic atomic layers connected with an Fe or Gd atomic wire are presented as function of the dimensionless frequency Ω in the magnons energy band. The coherent reflection and transmission scattering cross sections show characteristic spectral features, depending on the length of the wire, on the cut-off frequencies for the propagating magnons, as well as on the magnons incidence angle. The results illustrate the occurrence of Fano resonances in the transmitted spectra due to the interaction of localized spin states on the atomic wire with the propagating spin waves of the waveguide. An interesting physical effect is observed for this magnetic atomic junction, namely the frequency selective conductance of the spin waves via Fano resonances, by an appropriate choice of the spin-wave incident angle.

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47

Bile, Alessandro, Hamed Tari, Riccardo Pepino, Arif Nabizada, and Eugenio Fazio. "Solitonic Neural Network: A novel approach of Photonic Artificial Intelligence based on photorefractive solitonic waveguides." EPJ Web of Conferences 287 (2023): 13003. http://dx.doi.org/10.1051/epjconf/202328713003.

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Neuromorphic models are proving capable of performing complex machine learning tasks, overcoming the structural limitations imposed by software systems and electronic neuromorphic models. Unlike computers, the brain uses a unified geometry whereby memory and computation occur in the same physical location. The neuromorphic approach tries to reproduce the functional blocks of biological neural networks. In the photonics field, one possible and efficient way is to use integrated circuits based on soliton waveguides, ie channels self-written by light. Thanks to the nonlinearity of some crystals, propagating light can write waveguides and then can modulate them according to the information it carries. Thus, the created structures are not static but they can self-modify by varying the input information pattern. These hardware systems show a neuroplasticity which is very close to the one which characterize the brain functioning. The solitonic neuromorphic paradigm this work introduces is based on X-junction solitonic neurons as the fundamental elements for complex neural networks. These solitonic units are able to learn information both in supervised and unsupervised ways by unbalancing the X-junction. The storage of information coincides with the evolution of structure that changes plastically. Thus, complex solitonic networks can store information as propagation trajectories and use them for reasoning.

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48

Strizhachenko, A. V., and S. N. Shul’ga. "Eigen Q-factor of electromagnetic oscillations of E-type in waveguide junction of plane waveguides with anisotropic dielectric." Radioelectronics and Communications Systems 53, no. 8 (August 2010): 438–41. http://dx.doi.org/10.3103/s0735272710080078.

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49

Wang, Yubo, Xingbai Hong, Dan Wu, He Wu, and Akira Ishibashi. "Cylindrical Waveguides and Multi-Junction Solar Cell Investigated for Two-Dimensional Photorecepto-Conversion Scheme." Photonics 10, no. 3 (March 12, 2023): 299. http://dx.doi.org/10.3390/photonics10030299.

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Presented is a new cylindrical waveguide (WG) system based on a two-dimensional photoreceptor-conversion scheme (2DPRCS) for lamppost-type solar-cell systems. The optical properties of polydimethylsiloxane (PDMS) were evaluated as the WG material, and we found that the intrinsic optical loss of our PDMS-based waveguide (~3 m−1) is low enough to be used in a 50 mm diameter lamppost 2DPRCS. The reflection solar concentrator (RSC) is also proposed, which can be combined with multijunction Si solar cells for lamppost-type systems that utilize sunlight coming not only from the south side but also from the east and west sides. We believe that, in the near future, this new approach based on 2DPRCS can enable high-efficiency concentrated photovoltaic systems.

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50

Rud', L. A. "Axially Rotated Step Junction of Rectangular Waveguides and Resonant Diaphragms Based Thereupon." Telecommunications and Radio Engineering 55, no. 9 (2001): 10. http://dx.doi.org/10.1615/telecomradeng.v55.i9.30.

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