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Q-factor tuning in stress-engineered microresonators is presented. Bent-edge microdisks (mu-kylix), where highest Q's are 60 nm blue-shifted with respect to flat disks, are used to probe Purcell enhancement of Si-nc emission rate in a wide spectral range.
We report on visible light emission from Si quantum dot (QD)-based optically active microdisk resonators with highest quality factors of up to 7000 at visible wavelengths, where Si QDs absorb strongly. Generally, contributions from various loss channels within optically active micro-resonator devices lead to limited spectral windows, referred to as Q-bands, where highest mode Q-factors manifest. Here...
We report on visible light WGM emission from Si-nanocrystal-based all-active microdisk resonators. The observed significant, 13-fold mode narrowing (Q~2800) at lowest excitation powers is attributed to the attenuation of pump-induced excited carrier absorption loss mechanism.
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