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Whispering-gallery wave

About: Whispering-gallery wave is a research topic. Over the lifetime, 4378 publications have been published within this topic receiving 83684 citations.


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Journal ArticleDOI
TL;DR: The enhancement mechanisms responsible for the extreme sensitivity of the WGM biosensor are described, its current implementations and applications are reviewed, and its future possibilities are discussed.
Abstract: Optical label-free detectors, such as the venerable surface plasmon resonance (SPR) sensor, are generally favored for their ability to obtain quantitative data on intermolecular binding. However, before the recent introduction of resonant microcavities that use whispering gallery mode (WGM) recirculation, sensitivity to single binding events had not materialized. Here we describe the enhancement mechanisms responsible for the extreme sensitivity of the WGM biosensor, review its current implementations and applications, and discuss its future possibilities.

1,621 citations

Journal ArticleDOI
TL;DR: In this paper, a new microlaser design based on the highreflectivity whisperinggallery modes around the edge of a thin semiconductor microdisk is described and initial experimental results are presented.
Abstract: A new microlaser design based on the high‐reflectivity whispering‐gallery modes around the edge of a thin semiconductor microdisk is described and initial experimental results are presented. Optical confinement within the thin disk plane results in a microresonator with potential for single‐mode, ultralow threshold lasers. Initial experiments use selective etching techniques in the InP/InGaAsP system to achieve 3–10 μm diameter disks as thin as 500 A suspended in air or SiO2 on an InP pedestal. Optically pumped InGaAs quantum wells provide sufficient gain when cooled with liquid nitrogen to obtain single‐mode lasing at 1.3 and 1.5 μm wavelengths with threshold pump powers below 100 μW.

1,383 citations

Journal ArticleDOI
TL;DR: The observation of critical coupling in a high- Q fused-silica microsphere whispering-gallery mode resonator coupled to a fiber taper opens up a range of new applications in fields as diverse as near-field sensing and quantum optics.
Abstract: We present the observation of critical coupling in a high-Q fused-silica microsphere whispering-gallery mode resonator coupled to a fiber taper Extremely efficient and controlled power transfer to high-Q (∼10^7) resonators has been demonstrated Off-resonance scattering loss was measured to be less than 03% On-resonance extinction in transmitted optical power through the fiber coupler was measured as high as 26 dB at the critical coupling point This result opens up a range of new applications in fields as diverse as near-field sensing and quantum optics

967 citations

Journal ArticleDOI
TL;DR: In this article, an optical biosensor with unprecedented sensitivity for detection of unlabeled molecules is presented. But the method relies on the use of a dielectric microparticle (whispering gallery modes) as the physical transducing mechanism.
Abstract: We present an optical biosensor with unprecedented sensitivity for detection of unlabeled molecules. Our device uses optical resonances in a dielectric microparticle (whispering gallery modes) as the physical transducing mechanism. The resonances are excited by evanescent coupling to an eroded optical fiber and detected as dips in the light intensity transmitted through the fiber at different wavelengths. Binding of proteins on the microparticle surface is measured from a shift in resonance wavelength. We demonstrate the sensitivity of our device by measuring adsorption of bovine serum albumin and we show its use as a biosensor by detecting streptavidin binding to biotin.

955 citations

Journal ArticleDOI
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.
Abstract: We show that high-Q whispering-gallery modes in fused-silica microspheres can be efficiently excited by an optical fiber taper. By adjusting the taper diameter to match the ropagation constant of the mode in the taper with that of the resonant mode of interest, one can couple more than 90% of the light into the sphere. This represents a significant improvement in excitation efficiency compared with other methods and is, we believe, the most efficient excitation of a high- Q microcavity resonance by a monomode optical fiber yet demonstrated.

937 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023148
2022309
2021208
2020251
2019259
2018238