Journal ArticleDOI
Ultracompact biochemical sensor built with two-dimensional photonic crystal microcavity.
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TLDR
By measuring the resonant wavelength of a two-dimensional photonic crystal microcavity, a time-resolved sensing capability is demonstrated that can detect the change in refractive index of 0.002.Abstract:
We report an experimental demonstration of an ultracompact biochemical sensor based on a two-dimensional photonic crystal microcavity. The microcavity, fabricated on a silicon-on-insulator substrate, is designed to have a resonant wavelength (λ) near 1.5 µm. The transmission spectrum of the sensor is measured with different ambient refractive indices ranging from n=1.0 to n=1.5. From observation of the shift in resonant wavelength, a change in ambient refractive index of Δn=0.002 is readily apparent. The correspondence between absolute refractive index and resonant wavelength agrees with numerical calculation to within 4% accuracy. The evaporation of water in a 5% glycerol mixture is also used to demonstrate the capability for in situ time-resolved sensing.read more
Citations
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Journal ArticleDOI
Optical Whispering-Gallery-Mode Microbubble Sensors
TL;DR: In this article , the authors systematically review and summarize the sensing mechanisms, fabrication and packing methods, and various applications of optofluidic WGM microbubble resonators.
Journal ArticleDOI
Sucrose concentration detector based on a binary photonic crystal with a defect layer and two nanocomposite layers
A. H. M. Almawgani,Bhuvneshwer Suthar,A. Bhargava,Sofyan A. Taya,Malek G. Daher,Feng Wu,Ilhami Colak +6 more
TL;DR: In this article , a binary Si/SiO2 photonic crystal with a defect layer and two nanocomposite layers was proposed for the detection of sucrose concentration in an aqueous solution.
Journal ArticleDOI
The water content sensor in heavy oil based on one-dimensional photonic crystals
TL;DR: In this article, an ultracompact sensor based on a one-dimensional (1D) photonic crystal (PhC) of alternate layers of SiO2 and TiO2 with a defect layer in the middle, was proposed for measuring the water content in heavy oil.
Journal ArticleDOI
Increased photon density of states at defect-mode frequencies led enhancement of tunability of spontaneous emission from Eu2+, 3+ doped SiO2/SnO2 one-dimensional photonic crystals
TL;DR: One-dimensional photonic crystal (1DPhC) micro-cavity resonators, constituted of Eu2+, 3+ doped silica layer inserted between two 5-bilayered SiO2/SnO2 Bragg mirrors, are fabricated by sol?gel process as discussed by the authors.
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Optimization of high-Q coupled nanobeam cavity for label-free sensing.
TL;DR: The numerically and experimentally investigated the lateral coupling between photonic crystal (PhC) nanobeam (NB) cavities, pursuing high sensitivity and figure of merit (FOM) label-free biosensor, and it is shown that even modes are more sensitive than odd modes.
References
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Book
CRC Handbook of Chemistry and Physics
TL;DR: CRC handbook of chemistry and physics, CRC Handbook of Chemistry and Physics, CRC handbook as discussed by the authors, CRC Handbook for Chemistry and Physiology, CRC Handbook for Physics,
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Block-iterative frequency-domain methods for Maxwell’s equations in a planewave basis
TL;DR: A fully-vectorial, three-dimensional algorithm to compute the definite-frequency eigenstates of Maxwell's equations in arbitrary periodic dielectric structures, including systems with anisotropy or magnetic materials, using preconditioned block-iterative eigensolvers in a planewave basis is described.
Journal ArticleDOI
A Porous Silicon-Based Optical Interferometric Biosensor
Victor Lin,Kianoush Motesharei,Kianoush Motesharei,Keiki-Pua S. Dancil,Keiki-Pua S. Dancil,Michael J. Sailor,Michael J. Sailor,M. Reza Ghadiri,M. Reza Ghadiri +8 more
TL;DR: A biosensor has been developed based on induced wavelength shifts in the Fabry-Perot fringes in the visible-light reflection spectrum of appropriately derivatized thin films of porous silicon semiconductors based on Binding of molecules induced changes in the refractive index of the porous silicon.
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Linear waveguides in photonic-crystal slabs
TL;DR: In this article, a systematic analysis of waveguides in photonic-crystal slabs is presented, and the considerations that must be applied to achieve single-mode guided bands in these systems are discussed.
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Principles of biosensing with an extended coupling matrix and surface plasmon resonance
TL;DR: In this paper, the surface plasmon resonance angle shifts are calculated as a function of the amount of organic material in the interaction matrix and the influence of physical parameters, such as matrix thickness and wavelength of the light, on the expected performance is considered.