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Increasing the coupling efficiency of a microdisk laser to waveguides by using well designed spiral structures

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]

CollectionsANU Research Publications
Date published: 2010-02-23
Type: Journal article
Source: Journal of Applied Physics
DOI: 10.1063/1.3309748


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