Liu, Danyu; Hattori, Haroldo T.; Fu, Lan; Tan, Hark Hoe; Jagadish, Chennupati
In this article, we optimize the coupling efficiency from a GaAs microdisk resonator into a single
mode spiral waveguide. A classical microdisk resonator coupling light into a nonevanescent straight
waveguide reaches a typical coupling efficiency of 67%. We show that the introduction of a spiral
waveguide that works both as a waveguide and circular Bragg reflector can improve such efficiency
to almost 90%. The same structure with the addition of a taper can couple up to 80% of...[Show more]
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