Abstract
Dielectric microcavities are used widely today for confining the light to its wavelength scale, which is important for fundamental physics studies of light-matter interactions such as cavity quantum electrodynamics (QED) and cavity polaritons, as well as various applications including ultrafast lasers and single-photon light sources [1]. They have been implemented in various platforms such as microrings, microdisks, micropilars, photonic crystals (PhCs), etc. Usually, it is desirable to reduce the mode volume while keeping the quality-factor (Q-factor) as high as possible for an optical cavity to enhance the light-matter interaction. Recently, a particular type of optical mode with an infinite Q-factor has been reported in a PhC slab, which is referred to as bound state in the continuum (BIC) [2]. A BIC is a special solution of a wave equation, which is discrete and bounded while it lies inside a continuum of unbounded states [2].
© 2017 IEEE
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