Topic
Optical microcavity
About: Optical microcavity is a research topic. Over the lifetime, 2599 publications have been published within this topic receiving 72125 citations. The topic is also known as: optical microcavities.
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Patent•
04 Jan 2002TL;DR: In this paper, a device for measuring the concentration of a gas contained in a cavity (C) was proposed, where a first emitter (E1) consisting of an optically pumped optical microcavity whereof the emission spectrum is located in the gas absorption band emits a first radiation which passes through the cavity.
Abstract: The invention concerns a device for measuring concentration of a gas contained in a cavity (C). A first emitter (E1) consisting of an optically pumped optical microcavity whereof the emission spectrum is located in the gas absorption band emits a first radiation which passes through the cavity. A second emitter likewise consisting of an optically pumped optical microcavity whereof the emission spectrum is located outside the gas absorption band emits a second radiation which passes through the cavity. Receiving means (Ri) measure the optical intensity (I) of the beams which have passed through the cavity. A processing circuit (T) measures the concentration (N) of the gas from the measured optical intensity levels. The invention is useful, inter alia, for controlling the operating conditions of the catalytic element of a motor vehicle exhaust line.
11 citations
TL;DR: In this paper, the quantum statistics control with a hybrid system comprised of a quantum emitter and a plasmonic multimode nanocavity was demonstrated, which can be used to control the photon statistics without the need for strong coupling and may find applications in nanoscale refractive index sensing.
Abstract: Using a scattered field interference mechanism, we theoretically demonstrate the quantum statistics control with a hybrid system comprised of a quantum emitter and a plasmonic multimode nanocavity. Enhanced through multimode interactions, destructive interference between scattered fields from the emitter and nanocavity is able to change the photon statistics from bunching to antibunching. This transition cannot be explained by treating the plasmonic nanocavity in the dipole approximation. In some specific regions, an effective single-mode model, which is equivalent to the multimode model, is derived by simply shifting the transition frequency and modifying decay rates of the nearby quantum emitter. Superior to the closed optical microcavity, this hybrid system can be used to control the photon statistics without the need for strong coupling, and may find applications in nanoscale refractive index sensing.
11 citations
01 Jan 2005
TL;DR: A vertical-access passive all-optical gate has been used to improve the extinction ratio of a 160 GHz pico-second pulse train at 1555 nm and an extinction ratio enhancement of 6 dB is observed within an 8 nm bandwidth.
Abstract: A vertical-access passive all-optical gate has been used to improve the extinction ratio of a 160 GHz pico-second pulse train at 1555 nm. An extinction ratio enhancement of 6 dB is observed within an 8 nm bandwidth. Such a device is a promising candidate for low-cost all optical reamplication and reshaping (2R) regeneration at 160 Gbits/s.
11 citations
TL;DR: In this article, the authors studied the spin-noise-induced fluctuations of Kerr rotation in a quantum-well microcavity and found a dramatic increase of the noise signal (by more than two orders of magnitude) in the vicinity of anti-crossing of the polariton branches.
Abstract: When studying the spin-noise-induced fluctuations of Kerr rotation in a quantum-well microcavity, we have found a dramatic increase of the noise signal (by more than two orders of magnitude) in the vicinity of anti-crossing of the polariton branches. The effect is explained by nonlinear optical instability of the microcavity giving rise to the light-power-controlled amplification of the polarization noise signal. In the framework of the developed model of built-in amplifier, we also interpret the nontrivial spectral and intensity-related properties of the observed noise signal below the region of anti-crossing of polariton branches. The discovered effect of optically controllable amplification of broadband polarization signals in microcavities in the regime of optical instability may be of interest for detecting weak oscillations of optical anisotropy in fundamental research and for other applications in optical information processing.
11 citations
Patent•
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26 Jul 2005
TL;DR: In this article, the authors proposed a simple optical sensor chip with a simple structure, wherein light which has a wide wavelength band in comparison with laser light is easily introduced into a single-mode optical thin waveguide layer.
Abstract: PROBLEM TO BE SOLVED: To provide an optical sensor chip with a simple structure, wherein light which has a wide wavelength band in comparison with laser light is easily introduced into a single-mode optical thin waveguide layer. SOLUTION: The optical sensor chip comprises: a substrate; the single-mode optical waveguide layer which is formed on the surface of the substrate and has a refractive index higher than that of the substrate; a self-luminous layer which is formed at a portion of the surface of the optical waveguide layer and which is thinner than the cutoff; and an optical element arranged at a portion of the surface of the optical waveguide layer and emitting light outside which propagates through the optical waveguide layer. COPYRIGHT: (C)2007,JPO&INPIT
11 citations