Abstract
ABSTRACT A general model is presented for coupling of high-Q whispering-gallery modes in optical micro-sphere resonators with coupler devices possessing discrete and continuous spectrum of propagating modes. By contrast to Fabry-Perot resonators, in microspheres independent high intrinsic quality-factor and controllable parameters of coupling via evanescent field offer variety of regimes earlier available in RF devices. Latest results on realization of material-limited Q 'S-' 1010 in microspheres in the visible and near-infrared band and preservation of very-high Q in surface-hydration-preventingenvironment are presented. 1. INTRODUCTION High-Q optical microsphere resonators currently attract a growing interest in experimental cavity Q ED'3, measurement science,4'5 frequency stabilization and other photonics applications6'7. Trans-lated from extensive studies of Mie resonances in microdroplets of aerosols, observed via elastic and inelastic scattering of free-space beams, further studies of laboratory-fabricated solid-state micro-
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