منابع مشابه
Biosensing by WGM Microspherical Resonators
Whispering gallery mode (WGM) microresonators, thanks to their unique properties, have allowed researchers to achieve important results in both fundamental research and engineering applications. Among the various geometries, microspheres are the simplest 3D WGM resonators; the total optical loss in such resonators can be extremely low, and the resulting extraordinarily high Q values of 10⁸-10⁸ ...
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We report on visible light emission from Si quantum dot (QD) based optically active microdisk resonators. Room temperature photoluminescence from single microdisks shows the characteristic modal structure of whispering-gallery modes (WGM). Highest quality factors of up to 7000 at visible wavelengths, where Si QDs absorb strongly, have been measured for the first time. Apart from conventional fl...
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A compact silicon ring resonator is demonstrated that allows simple electrical tuning of the ring coupling coefficient and Q-factor and therefore the resonant enhancement of on-chip nonlinear optical processes. Fabrication-induced variation in designed coupling fraction, crucial in the resonator performance, can be overcome using this post-fabrication trimming technique. Tuning of the microring...
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In this work, detailed design and realization of high quality factor (Q) racetrack resonators based on silicon-on-insulator rib waveguides are presented. Aiming to achieve critical coupling, suitable waveguide geometry is determined after extensive numerical studies of bending loss. The final design is obtained after coupling factor calculations and estimation of propagation loss. Resonators wi...
متن کاملGHz optomechanical resonators with high mechanical Q factor in air.
We demonstrate wheel-shaped silicon optomechanical resonators for resonant operation in ambient air. The high finesse of optical whispering gallery modes (loaded optical Q factor above 500,000) allows for efficient transduction of the wheel resonator's mechanical radial contour modes of frequency up to 1.35 GHz with high mechanical Q factor around 4,000 in air.
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ژورنال
عنوان ژورنال: Optica
سال: 2018
ISSN: 2334-2536
DOI: 10.1364/optica.5.001525