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Journal ArticleDOI

Ultimate Q of optical microsphere resonators.

TLDR
It is demonstrated that quality factor Q - (0.8 +/- 0.1) x 10(10) of whispering-gallery modes in fused-silica microspheres at 633 nm, close to the ultimate level determined by fundamental material attenuation as measured in optical fibers, is demonstrated.
Abstract
We demonstrate the quality factor Q - (0.8 +/- 0.1) x 10(10) of whispering-gallery modes in fused-silica microspheres at 633 nm, close to the ultimate level determined by fundamental material attenuation as measured in optical fibers. The lifetime of ultimate Q is limited by adsorption of atmospheric water. Monitoring of adsorption kinetics with submonolayer sensitivity by Q factors and frequencies of whispering-gallery modes is demonstrated. The possibility of supermaterial Q's owing to intrinsic suppression of scattering losses in micropheres is discussed.

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Citations
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Proceedings Article

Optical microcavities

TL;DR: In quantum optical devices, microcavities can coax atoms or quantum dots to emit spontaneous photons in a desired direction or can provide an environment where dissipative mechanisms such as spontaneous emission are overcome so that quantum entanglement of radiation and matter is possible.
Journal ArticleDOI

Sensitive optical biosensors for unlabeled targets: a review.

TL;DR: This article reviews the recent progress in optical biosensors that use the label-free detection protocol, in which biomolecules are unlabeled or unmodified, and are detected in their natural forms, and focuses on the optical biosENSors that utilize the refractive index change as the sensing transduction signal.
Journal ArticleDOI

Ultralow-threshold Raman laser using a spherical dielectric microcavity

TL;DR: This work demonstrates a micrometre-scale, nonlinear Raman source that has a highly efficient pump–signal conversion (higher than 35%) and pump thresholds nearly 1,000 times lower than shown before, which represents a route to compact, ultralow-threshold sources for numerous wavelength bands that are usually difficult to access.
Journal ArticleDOI

Phase-matched excitation of whispering-gallery-mode resonances by a fiber taper

TL;DR: It is shown that high-Q whispering-gallery modes in fused-silica microspheres can be efficiently excited by an optical fiber taper and is believed to be the most efficient excitation of a high- Q microcavity resonance by a monomode optical fiber yet demonstrated.
Journal ArticleDOI

Exceptional topology of non-Hermitian systems

TL;DR: In this paper, the role of topology in non-Hermitian (NH) systems and its far-reaching physical consequences observable in a range of dissipative settings are reviewed.
References
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Book

Physical chemistry of surfaces

TL;DR: In this paper, the authors discuss the nature and properties of liquid interfaces, including the formation of a new phase, nucleation and crystal growth, and the contact angle of surfaces of solids.
Journal ArticleDOI

Quality-factor and nonlinear properties of optical Whispering-Gallery modes

TL;DR: In this article, the properties of optical resonators with quality-factor Q⩾108, effective volume of e.m. field localization Veff ≥ 10−9 cm3 and threshold power of optical bistability Wbist≈10−5 W are described.
Journal ArticleDOI

Very high-Q whispering-gallery mode resonances observed on fused silica microspheres

TL;DR: In this article, the whispering-gallery modes of 60 to 200 μm diameter microspheres obtained by fusing with a CO2 laser the end of a high-transmission silica fibre were studied.
Journal ArticleDOI

Splitting of high-Q Mie modes induced by light backscattering in silica microspheres

TL;DR: It is observed that very high-Q Mie resonances in silica microspheres are split into doublets, attributed to internal backscattering that couples the two degenerate whispering-gallery modes propagating in opposite directions along the sphere equator.
Journal ArticleDOI

High-Q optical whispering-gallery microresonators : precession approach for spherical mode analysis and emission patterns with prism couplers

TL;DR: In this paper, high-Q optical whispering-gallery modes TE(TM)lmq in spheroidal dielectric microresonators are shown to be equivalent to precessing circular modes with the rate of precession depending on the value of the residual resonator nonsphericity.
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