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
Frequency control of photonic crystal membrane resonators by monolayer deposition
Stefan Strauf,Matthew T. Rakher,Itai Carmeli,K. Hennessy,Cedrik Meier,Antonio Badolato,M. J. A. DeDood,Pierre Petroff,Evelyn Hu,Elisabeth G. Gwinn,Dirk Bouwmeester +10 more
TL;DR: In this article, the authors studied the response of GaAs photonic crystal membrane resonators to thin-film deposition and found that 2-nm-thick monolayers lead to a discrete step in the resonance frequency and partially passivate the surface.
Journal ArticleDOI
Ultracompact refractive index sensor based on microcavity in the sandwiched photonic crystal waveguide structure
TL;DR: In this paper, a two-dimensional photonic crystal is used to construct a point-defect resonant cavity in the sandwiched waveguide structure for a sensor with different ambient refractive indices.
Journal ArticleDOI
Infiltrated photonic crystal cavity as a highly sensitive platform for glucose concentration detection
TL;DR: In this article, a bio-sensing platform based on an infiltrated photonic crystal ring shaped holes cavity-coupled waveguide system is proposed for glucose concentration detection, which provides an excellent optical confinement within the cavity region, which further enhances the light-matter interactions at the precise location of the analyte medium.
Journal ArticleDOI
Ultrasensitive Surface Refractive Index Imaging Based on Quasi-Bound States in the Continuum.
Silvia Romano,Maria Mangini,Erika Penzo,Stefano Cabrini,Anna Chiara De Luca,Ivo Rendina,Vito Mocella,Gianluigi Zito +7 more
TL;DR: A cavity-enhanced hyperspectral refractometric imaging using an all-dielectric photonic crystal slab (PhCS) that provides a correlative imaging platform that can find application in many fields for monitoring physical and biochemical processes, such as molecular interactions, chemical reactions, or surface cell analysis.
Journal ArticleDOI
Integrated optical frequency-resolved Mach-Zehnder interferometers for label-free affinity sensing.
TL;DR: The obtained results substantiate that IO FR-MZI- based sensors constitute a generic technological platform of high sensitivity that can be implemented into a plethora of detection schemes.
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.