Дисертації з теми "Guided mode resonance grating filters"
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Boonruang, Sakoolkan. "TWO-DIMENSIONAL GUIDED MODE RESONANT STRUCTURES FOR SPECTRAL FILTERING APPLICATIONS." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3940.
Повний текст джерелаPh.D.
Optics and Photonics
Optics and Photonics
Optics PhD
Sharshavina, Ksenia. "Nouveaux concepts de filtres spectraux ultra-sélectifs pour spectroscopie embarquée." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30264/document.
Повний текст джерелаGuided Mode Resonance Filters ( GMRF ) are a new generation of narrowband optical filters and are a very promising alternative to conventional multilayer Fabry-Perot filters. The resonance peak of GMRF can be spectrally extremely thin and with a centering wavelength tunable according to the angle of incidence of the light. These properties are particularly important for spectroscopy. Previous works have helped to implement an original structure with two 1D crossed gratings. The performance of this filter overpasses those of conventional filters in their spectral subnanometric response, tunability and their ability to overcome the influence of the polarization of the incident wave under oblique incidence. The aim of this work is to explore the final performances of such devices in terms of resolution and rejection rate, thanks to an approach combining theory, fabrication technology and characterization. We present experimental results of a polarization independent reflective filter, tunable over 40nm with a tunability of 8.3nm / °, having a reflection of 10-3 on a 90nm range outside the resonance and a quality factor over 5000
Boye, Robert Russell. "Physical optics approach to guided-mode resonance filters." Diss., The University of Arizona, 2000. http://hdl.handle.net/10150/284141.
Повний текст джерелаSrinivasan, Pradeep. "DESIGN AND FABRICATION OF SPACE VARIANT MICRO OPTICAL ELEMENTS." Doctoral diss., University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2817.
Повний текст джерелаPh.D.
Optics and Photonics
Optics and Photonics
Optics PhD
Bierret, Antoine. "Composants nanostructurés pour le filtrage spectral à l’échelle du pixel dans le domaine infrarouge." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX085/document.
Повний текст джерелаSpectral analysis of an infrared scene allows for a better identification of its components. Nanotechnologies offer new opportunities to achieve spectral filtering thanks to optical resonances. In this thesis, I use sub-wavelength gratings to achieve spectral filtering on areas as small as a pixel. I focused on the study of guided-mode resonance filters, made of a coupling grating and a thin dielectric layer acting as a waveguide. This structure typically needs large surfaces to filter infrared light. However, I proposed two possible modifications of this structure: either using a resonant cavity or using metallic gratings.Numerical analysis of the optical response of structures with a metallic grating showed that the spatial extension of the electromagnetic field is limited at the resonant wavelength. Thanks to this short extension, I is possible to achieve filtering with only 30 µm-long guided-mode resonance filters. I also fabricated and characterized those pixel-sized filters.Finally, I studied mosaics of small guided-mode resonance filters. I showed that the dimensions, the resonant transmissions and the angular acceptance of those mosaics are compatible with using them inside multi-spectral cameras. I also showed a sample architecture for an infrared multispectral-camera using a mosaics of guided-mode resonance filters
Chandrika, T. N. "Design and Analysis of Integrated Optic Waveguide Grating for Sensor and Communication Applications." Thesis, 2018. https://etd.iisc.ac.in/handle/2005/4505.
Повний текст джерелаChang, Jia-Sian, and 張家賢. "Gold Nanoparticles-Modified Grating as Guided Mode Resonance Biosensor." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/82916060484399844817.
Повний текст джерела國立中正大學
化學暨生物化學研究所
103
Many diseases will release specific biomolecules before outbreak of the diseases. Particle plasmon resonance (PPR) occurs when a noble metal nanoparticle absorbs a specific wavelength of energy which is equal to the oscillation frequency of the conductive electrons. The principle of sensing here is based on the coupling of incident light into the guided-mode resonance sensing chip through a grating at a specific angle and wavelength. When the leakage mode and diffraction grating matching condition is reached, the electric field distribution on the grating surface will enhance the particle plasmon resonance effect of the gold nanoparticles. When the particle’s surrounding refractive index changes, the particle plasmon resonance band will shift, resulting in optical signal change. In this study, we successfully modified gold nanoparticles (GNP) and gold nanorods (GNR) on grating. The GNP-GMR-PPR sensor has achieved an absorbance sensitivity of 2.21 RIU-1 at an excitation wavelength of 532 nm and a sensor resolution of 1.82×10-5 RIU. The limit of detection for anti-DNP antibody is 1.18×10-10 M. The GNR-GMR-PPR sensor has achieved an absorbance sensitivity of 26.61 RIU-1 at an excitation wavelength of 885 nm and a sensor resolution 4.16×10-6 RIU.
Chen, Ching-yu, and 陳慶育. "Two-dimensional grating sensors based on guided-mode resonance effect." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/60296279448295136140.
Повний текст джерела國立中山大學
光電工程學系研究所
104
In this study, we employ two-dimensional (2-D) grating structures and the guided mode resonance effect to design dual-parameter sensors. The incident light is diffracted by the 2-D grating to induce both the transverse electric (TE) guided mode and transverse magnetic (TM) guided mode of the waveguide. Due to the grating structures, the guided waveguide modes will leak out from the waveguide. As they fulfill the phase matching condition, we can observe resonance peaks in the spectrum. The resonance wavelengths can be affected by the external environment parameters. As a result, we can achieve dual-parameter sensing by measuring the TE/TM resonance wavelengths. The numerical tool we utilized is Comsol Multiphysics. For the reflection type dual-parameter sensor, the sensing sensitivities to temperature and environment refractive index are -13.8pm/°C (TE waveguide mode), -24pm/°C (TM waveguide mode), 37nm/RIU (TE waveguide mode), and 186nm/RIU (TM waveguide mode). Meanwhile, the calculated sensing sensitivities of transmission type dual-parameter sensor to temperature and environment refractive index are -20pm/°C (TE waveguide mode), -40pm/°C (TM waveguide mode), 27nm/RIU (TE waveguide mode), and 54nm/RIU (TM waveguide mode). We have also designed reflection type dual-parameter sensor for thin-film sensing. The sensing sensitivities to thin film thickness and index are 0.18 nm/nm (TE waveguide mode), 0.2 nm/nm (TM waveguide mode), 252.849nm/RIU (TE waveguide mode), and 190.5 nm/RIU (TM waveguide mode). Moreover, our proposed dual-parameter sensors can be used without cross-sensitivities to increase their sensing applications.
Lu, I.-Chun, and 陸奕君. "Research of Ultranarrow-Band Guided-Mode Resonance Filters with Flattened Sidebands." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/87941074118310440650.
Повний текст джерела國立中央大學
光電科學研究所
95
In this thesis, we show that ultranarrow-band guided-mode resonance (GMR) filters with flattened sidebands can be implemented with weakly modulated subwavelength gratings and low/high/low quarter-half-quarter dielectric thin-film stacks. These band-stop (notch) filters with characteristics of high efficiency, extended low-sideband reflection, and symmetric line shapes are designed by embedding waveguide gratings in layered structures possessing the feature of antireflection. The resonant wavelength of proposed GMR filters is precisely controlled at 1550 nm for optical communication. Furthermore, the improved spectral performance at sideband including the intensity of zero-order diffraction efficiency greater than 0.9 and the spectral range of sideband greater than 400 nm, the improved contrast between resonance peak and sideband, as well as the modulate ultra-narrow linewidth for resonance peak are demonstrated theoretically. The thickness of SiNx waveguide and its corresponding grating period are designed by using the waveguide theory and the phase-matching condition. The sideband performance can be improved by means of the effective medium theory. The effects of the grating filling factor and the grating depth on weakly-modulated GMRs are studied. The fabrication feasibility of proposed structures is considered during our design. Two GMR filters, containing the case of the transverse electric (TE) and the transverse magnetic (TM) polarization, are designed to demonstrate the concept. Under the requirement of transmission efficiency at sideband greater than 93%, resonance wavelength of 1550 nm, and its linewidth Δλ less than 0.8 nm, and sideband can extended more than 660 nm. Finally the sideband spectral response of proposed structures is compared by using the rigorous coupled wave analysis (RCWA) and the effective medium theory (EMT). The fabrication tolerance regarding grating depth, resonant peak location, and linewidth are discussed. Furthermore, the performances of ultranarrow-band guided-mode resonance filters are also studying by using band diagrams.
Cheng, Chung-Wei, and 鄭中瑋. "Study on High Quality-Factor Guided-Mode Resonance Filters in Infrared Region." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/21876453025897593162.
Повний текст джерела國立中央大學
光電科學研究所
96
In this letter, the two-layer ultranarrow bandstop guided-mode resonance filter with a flattened sideband within a wide spectral range is implemented by using the combination of a subwavelength grating, a waveguide layer with multiple guided modes, and a lower cladding layer with a quarter-wave thickness. The proposed filter based on a free-standing silicon nitride membrane suspended on a silicon substrate is realized by using the anisotropic wet etching to remove the substrate beneath the silicon nitride layer. Both of grating and waveguide structures are fabricated simultaneously on a silicon nitride membrane. Moreover, the silicon dioxide membrane playing a role on modifying the spectral response of proposed GMR filter is deposited beneath the free-standing silicon nitride layer. The incident light is TE mode and the thickness of grating is 30nm. The resonance wavelength of proposed band-stop filter is controlled at 1550.4nm with a linewidth (FWHM) less than 0.1 nm. The improved spectral performance including the sideband can be extended to be nm with the maximum transmittance greater than 93%. The quality factor is 15504. However, the incident light is TM mode and the thickness of grating is 30nm. The resonance wavelength of proposed band-stop filter is controlled at 1549.9nm with a linewidth (FWHM) less than 0.011 nm. The improved spectral performance including the sideband can be extended to be nm with the maximum transmittance greater than 93%. The quality factor is 140902.
Wang, Yen-Chieh, and 王彥傑. "Development of Displacement and Bio Sensor Based on Gradient Grating Period Guided-Mode Resonance." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/j6qpja.
Повний текст джерелаWang, Jhe-Hao, and 王哲晧. "Nanoimprint Fabricated Grating Modified with Gold Nanoparticles and its Application to Guided Mode Resonance Biosensor." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/7n44gn.
Повний текст джерела國立中正大學
化學暨生物化學研究所
102
In this study, guided mode resonance (GMR) biosensing platform combining the features of gold nanoparticles with grating waveguide is developed. This approach has an advantage as compared to the traditional guided mode resonance approach in biosensing, namely, the sensing depth of particle plasmon resonance generated on the gold nanoparticle surface is just tens of nanometers. This feature is useful for measuring biochemical binding on nanoparticle surface. Besides, the use of gold nanoparticles in biosensing also have two other features: label-free and real-time. It also allows using mixed self-assembled monolayer on gold nanoparticle surface to reduce nonspecific adsorption problem. The waveguide was fabricated by sputtering TiO2 (60nm) on the imprinted grating. The sensor has a wavelength shift sensitivity of 120.54 nm/RIU. When gold nanoparticles was used to modify the grating surface, an absorbance sensitivity of 7.73 AU/RIU at an excitation wavelength of 532 nm is achieved. Finally, the gold nanoparticle surface is modified by a mixed self-assembled monolayer and further conjugated with anti-OVA for detection of ovalbumin. The limit of detection (LOD) is 1.2x10-8 M.
Chang, Chih-Wei, and 張致瑋. "Development and applications of a detecting system based on gradient grating period guided-mode resonance." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/66894322203728375698.
Повний текст джерелаHuang, Jian Hao, and 黃建豪. "Optical control of guided mode resonance in azo-copolymer planar waveguide with surface relief grating." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/63673057168608098829.
Повний текст джерела國立中正大學
光機電整合工程研究所
99
In this thesis, we produced the azo-copolymer planar waveguide with surface relief grating (SRG) by two beam interference technique. Our samples were measured with guided mode resonance (GMR) transmission spectra that demonstrated full-half width-maximum (FHWM) about 3nm and the transmission efficiency indicated the attenuation down to 43%. In our experiment, Argon laser (514nm) exposure to the sample in order to change the refractive index of grating layer and guiding layer that controlled the GMR peak wavelength. The maximum shift of resonance wavelength was up to 26.4nm. After turning off the pumping laser, we observed the GMR peak wavelength can’t back to the original position for a long time. We decreased the GMR peak wavelength recovery time and rewrite the GMR successfully. In addition, the numerical simulation of GMR transmission spectra verified the experimental results. Simulation was used with Rigorous Coupled Wave Analysis (RCWA) method, the trend of simulation results approached with the experimental results very well.
Huang, Yu-Chung, and 黃宇中. "All-optically controlled guided mode resonance of two-dimensional grating waveguide structure with azo-dye active layer." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/96737560254673859895.
Повний текст джерелаCHIU, HSIEN-WEN, and 邱顯文. "Guided-mode resonance enhanced near-infrared-to-visible up-conversion fluorescence with a low-refractive index resonant waveguide grating." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/9vd97v.
Повний текст джерела國立中正大學
物理系研究所
104
The enhanced upconversion luminescence of lanthanide-ion(Ln3+) doped upconversion nanoparticles (UCNPs) is particularly important and highly required for their innumerable applications in fluorescence microscope, bio-imaging, sensing, solid-state lasers, 3D displays, and solar cells.In this study, we investigate the enhancement effect of upconversion fluorescence emission of UNCP by using low refractive index resonant waveguide grating(RWG) when both excitation and extraction resonance occur in the waveguide structure.The method to fabricate one-dimensional grating patterns with nanoporous SiO2, a low refractive index material (n=1.22), using nanoimprint lithography is reported. A guided mode resonant structure is obtained by subsequent sputtering of thin film of high refractive index titanium dioxide (TiO2) on the sample surface, and then NaYF4:Yb3+,Tm3+ nanoparticles are deposited onto the top cladding layer of a RWG structure by dip-coating method.We demonstrate the up-conversion photoluminescence signal generated from the rare-earth nanocrystal coated on top of such RWG structure can be enhanced up to 10^4 times when both excitation and extraction resonance are simultaneously achieved, compared with UCNPs on an non-patterned surface. Keywords : Low-refractive index , Up conversion, Rare earth, Fluorescence, Guided-mode resonance