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
Biosensing platforms based on silicon nanostructures: A critical review.
TL;DR: In this article, the most appealing sensing devices are discussed, starting from electronic transducers, with Si nanowires field effect transistor (FET) and porous Si, to their optical alternatives, such as effective optical thickness porous silicon, photonic crystals, luminescent Si quantum dots, and finally luminecent Si NWs, with a specific focus on the possibility of their industrial transfer and which ones may be preferred for a medical device.
Photonic crystal biosensor based on angular spectrum analysis
Elewout Hallynck,Peter Bienstman +1 more
TL;DR: In this paper, a photonic crystal based biosensor was proposed to operate at a single frequency, contrary to resonance-based sensors, which can couple to free space modes resulting in a Lorentzian shape.
Proceedings ArticleDOI
Optoelectronic devices
TL;DR: An optoelectronic device comprises a second substrate with at least one second conductive path, wherein the first Conductive path and the second conductic path are electrically connected to one another.
Journal ArticleDOI
High Sensitivity Photonic Crystal Biosensor Incorporating Nanorod Structures for Enhanced Surface Area
TL;DR: In this paper, the surface area of a photonic crystal biosensor was enhanced through incorporation of a porous titanium dioxide film into the device, which was deposited by the glancing angle deposition technique.
Journal ArticleDOI
Fiber Loop Ring-Down Refractive Index Sensor Based on High- $Q$ Photonic Crystal Cavity
TL;DR: In this article, the authors proposed a novel ultracompact refractive index sensor formed by a high-quality photonic crystal (PhC) cavity-based fiber loop ring-down.
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.