Bloch-surface-wave resonance in a cavity resonator for focusing retroreflection
Keisuke Ozawa,
Junichi Inoue,
Kenji Kintaka
et al.
Abstract:A wavelength-selective retroreflector for a diverging wave will be an attractive external mirror for compact wavelength-stabilized semiconductor lasers and consists of a focusing grating coupler and a cavity resonator. In this Letter, the retroreflector utilizing a Bloch surface wave (BSW) resonance was theoretically investigated for improving the retro-reflectance in comparison to a previously reported structure utilizing guided-mode resonance (GMR). A retroreflector with an aperture size of 31 µm and focal l… Show more
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