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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Quasi-periodic photonic crystal Fabry–Perot optical filter based on Si/SiO2 for visible-laser spectral selectivity
TL;DR: In this paper, a 1D quasi-periodic photonic crystal Fabry-Perot optical filter Cs(Si/SiO2)3(SiO 2/Si)3 for spectral selectivity of visible light and 1.55 µm laser is presented.
Journal ArticleDOI
Hybrid Photonic–Plasmonic Bound States in Continuum for Enhanced Light Manipulation
TL;DR: In this article, a hybrid photonic-plasmonic BIC (hybrid BICs) fabricated using a cost-efficient scalable fabrication method are experimentally realized.
Journal ArticleDOI
Detection of bio-organism simulants using random binding on a defect-free photonic crystal
Sarah E. Baker,Michael D. Pocha,Allan S. P. Chang,Donald J. Sirbuly,Stefano Cabrini,Scott Dhuey,Tiziana C. Bond,Sonia E. Létant +7 more
TL;DR: In this paper, the defect-free photonic crystal (PC) slab geometry was explored for size-selective detection of bio-organism simulants, and a conservative limit of detection estimate for randomized pore filling of a two-dimensional PC slab was generated.
Journal ArticleDOI
Optical properties of a point-defect nanocavity-based elliptical-hole photonic crystal for mid-infrared liquid sensing
TL;DR: In this article, the optical properties of point-defect nanocavities implemented on elliptical-hole planar photonic crystal (EPhC) have been investigated for mid-infrared liquid sensing application.
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Hybrid graphene–molybdenum disulphide based ring resonator for label-free sensing
TL;DR: In this paper, a novel graphene-MoS2 hybrid structure based surface plasmon resonance sensor is presented for label-free analysis, which consists of a silicon nitride (Si3N4) dielectric layer vertically coupled to a thin layer of metallic strip made of silver (Ag) on top.
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,
Journal ArticleDOI
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.
Journal ArticleDOI
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.