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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02 Jul 2007
TL;DR: In this article, a novel type of optical strain gage is presented, which consists of a thin polyimide foil with an integrated optical circuit, where the strain sensing elements are optical microresonators.
Abstract: We present a novel type of optical strain gage. The strain gage consists of a thin polyimide foil with an integrated optical circuit. The strain sensing elements are optical microresonators. The optical response to strain of these microresonators is a wavelength shift of the resonance wavelength. The optical circuit includes several of these resonators to measure strain in different directions. The strain sensor is read-out using a single-mode optical fiber. Because the different microresonators in the optical circuit have different resonance wavelengths, they can be read out using the same fiber. Our strain sensor is some kind of a cross between electrical resistance foil gages and fiber Bragg grating (FBG) sensors. It is a thin foil device, with a thickness of a few tens of micrometers, but it is an optical device and can be read out in a similar way as FBG sensors. We present the working principle, fabrication and first experimental results.
25 citations
TL;DR: In this article, the modal and lasing characteristics of a new type of vertical-cavity surface-emitting laser that uses an intracavity mesa to confine the optical mode, with the mesa also confining the quantum dot active region.
Abstract: Data are presented on the modal and lasing characteristics of a new type of vertical-cavity surface-emitting laser that uses an intracavity mesa to confine the optical mode, with the mesa also confining the quantum dot active region. The quantum dot active region is lithographically isolated within the intracavity mesa using etching and epitaxial regrowth to form an all-epitaxial microcavity light source. Cavity quality factors as high as 33 000 are measured, and ground state lasing is demonstrated with a single quantum dot active layer for temperatures up to ∼110K.
25 citations
TL;DR: A coupler based on silicon spherical microcavities coupled to silicon waveguides for telecom wavelengths is presented, experimentally demonstrated and theoretically modeled with the help of FDTD calculations.
Abstract: A coupler based on silicon spherical microcavities coupled to silicon waveguides for telecom wavelengths is presented. The light scattered by the microcavity is detected and analyzed as a function of the wavelength. The transmittance signal through the waveguide is strongly attenuated (up to 25 dB) at wavelengths corresponding to the Mie resonances of the microcavity. The coupling between the microcavity and the waveguide is experimentally demonstrated and theoretically modeled with the help of FDTD calculations.
25 citations
TL;DR: In this paper, a dye saturated porous silicon based single and coupled microcavities were used to demonstrate the photoluminescence line narrowing and intensity enhancement in a single-and multi-dimensional micro-cavity.
24 citations
TL;DR: In this article, a grain of the magnetostrictive material Terfenol-D within a high quality (Q) optical microcavity on a silicon chip was used to obtain a peak sensitivity of 26 ǫ pT/Hz comparable to the best cryogenic microscale magnetometers, along with a 3ÕdB bandwidth as high as 11.3 MHz.
Abstract: Magnetostrictive optomechanical cavities provide a new optical readout approach to room-temperature magnetometry. Here we report ultrasensitive and ultrahigh bandwidth cavity optomechanical magnetometers constructed by embedding a grain of the magnetostrictive material Terfenol-D within a high quality (Q) optical microcavity on a silicon chip. By engineering their physical structure, we achieve a peak sensitivity of 26 pT/Hz comparable to the best cryogenic microscale magnetometers, along with a 3 dB bandwidth as high as 11.3 MHz. Two classes of magnetic response are observed, which we postulate arise from the crystallinity of the Terfenol-D. This allows single crystalline and polycrystalline grains to be distinguished at the level of a single particle. Our results may enable applications such as lab-on-chip nuclear magnetic spectroscopy and magnetic navigation.
24 citations