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
Metamaterial band theory: fundamentals & applications
TL;DR: An overview of a meetamaterial band theory developed that rigorously models the behavior of metamaterials made of dispersive materials such as metals and shows that one can develop a perturbation formalism based on this theory to physically explain and predict the effect of dielectric refractive index modulation or metallic plasma frequency variation in metammaterials.
Journal ArticleDOI
Design and analysis of a channel drop filter and demultiplexer based on a photonic crystal super ellipse-shaped ring resonator
Massoudi Radhouene,Zaineb Gharsallah,V. Balaji,Monia Najjar,Savarimuthu Robinson,Vijay Janyani,M. Murugan,Gopalkrishna Hegde,T. Sridarshini +8 more
TL;DR: In this article , a photonic crystal (PC) based channel drop filter and demultiplexer based on a ring resonator with a super ellipse shape is designed and analyzed.
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Acoustic response in a a one-dimensional layered pseudo-Hermitian metamaterial containing defects
D. Psiachos,M. M. Sigalas +1 more
TL;DR: In this paper, the authors investigate the response of a multilayered metamaterial system containing defects to an incident acoustic plane wave at normal or oblique incidence, and find that defects can be exploited to produce highly sensitive responses, making such systems good candidates for sensor applications.
Journal ArticleDOI
Graphene surface plasmon off-axis superlens based on tilted one-dimensional Si/SiO 2 gratings
TL;DR: This work proposes a graphene-Si/SiO2 system, by transferring a graphene sheet on the tilted 1D subwavelength silicon/silica gratings, and discusses the dispersion relations of the inplane GSP in this system, where the GSP negative refraction is found in the mid-infrared region.
Proceedings ArticleDOI
Novel periodic microstructures fabricated by multi-exposure two-beam interference lithography
Yinbing Bai,A. Ping Zhang +1 more
TL;DR: In this paper, two-dimensional quasi-crystal structures with different internal nanopatterns are numerically and experimentally demonstrated based on multi-exposure two-beam interference lithography.
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.