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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Proceedings ArticleDOI
Effective index perturbation: correlations between the photonic bandgap and the donor-like defect mode in photonic crystal slabs
Zexuan Qiang,Weidong Zhou +1 more
TL;DR: In this paper, an effective index perturbation method was proposed to investigate the intrinsic characteristics of three-dimensional photonic-crystal-slab based microcavity with two-dimensional numerical simulation tools such as 2D-FDTD and plane-wave expansion (2D-PWE) techniques, for reduced computational requirements and fast design feedback.
Book ChapterDOI
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Proceedings ArticleDOI
Optimal design for monopole-mode photonic-crystal--slab microcavity
TL;DR: In this article, a modified single defect photonic-crystal-slab microcavity is proposed by adjusting the six inner holes size and shifting two of them along the ΓK direction.
Journal ArticleDOI
Highly Sensitive Optofluidic Sensor of 2D Si PhC L3 Cavity for Detection of Glucose and Bovine Serum Albumin
Proceedings ArticleDOI
Single Molecule Detection Using Silicon Photonic Crystal Slab
Mindy R. Lee,Philippe M. Fauchet +1 more
TL;DR: In this article, a single molecule detection using photonic bandgap structures on a SOI wafer was proposed, which works at communication band and can be potentially used for single-molecule detection.
References
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CRC Handbook of Chemistry and Physics
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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.
Journal ArticleDOI
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.