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
Double-layer fabrication scheme for large-area polymeric photonic crystal membrane on silicon surface by multibeam interference lithography.
TL;DR: Two-dimensional polymeric photonic crystal membranes are fabricated on the surface of silicon using visible-light multibeam interference lithography using a polymer buffer layer doped with a Rhodamine B laser dye to suppress the effects of strong reflection and nonradiative absorption of silicon on the interference pattern.
Journal ArticleDOI
Micro-Displacement Sensor With Large Dynamic Range Based on Photonic Crystal Co-Directional Coupler
TL;DR: In this article, a micro-displacement sensor based on a photonic crystal (PhC) co-directional coupler and its sensing technique is presented, which is valid for large displacement on the order of na (n is an integer, and a is the lattice constant of the PhC).
Journal ArticleDOI
Embedding multiple nondiffracting defect sites in periodic lattice wavefield by optical phase engineering
Manish Kumar,Joby Joseph +1 more
TL;DR: In this article, a periodic lattice wavefield with multiple nondiffracting negative defect sites at the desired locations is realized by coherently superposing periodic wavefields with Bessel wavefields at each of the defect sites.
Journal ArticleDOI
Fabrication of submicron structures in nanoparticle/polymer composite by holographic lithography and reactive ion etching
A. Ping Zhang,Sailing He,Kyoung Tae Kim,Yong-Kyu Yoon,Ryszard Burzynski,Marek Samoc,Marek Samoc,Paras N. Prasad +7 more
TL;DR: In this paper, the fabrication of nanoparticle/polymer submicron structures by combining holographic lithography and reactive ion etching is described, where Silica nanoparticles are uniformly dispersed in a (SU8) polymer matrix at a high concentration, and in situ polymerization (cross-linking) is used to form a nanoparticle and polymer composite.
Journal ArticleDOI
Cavity Design in Woodpile Based 3D Photonic Crystals
TL;DR: In this paper, a three-dimensional (3D) photonic crystal (PhC) nanocavity based on an optimized woodpile structure was designed to support Gaussian-like cavity modes similar to those seen in a Fabry Perot laser resonator.
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.
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.