講演情報
[18p-A34-4]Observation of unidirectional lasing in a ring resonator with a surface grating
〇(D)戴 知微1、林 文博2、池 尙玟1、作本 宙彌1、竹中 充1、岩本 敏1 (1.東大、2.東工大)
キーワード：
半導体レーザー、方向発振、特異光学
Unidirectional lasing is essential for developing ring resonator lasers that directly emit topological optical beams like optical vortexes and skyrmions. We fabricated and characterized ring resonators with periodic surface gratings and an S-shaped waveguide. Counter-propagating whispering gallery modes are observed with significant suppression of the unintended mode, achieving unidirectional lasing with a 6-fold intensity contrast, despite the scattering from surface graters.
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