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Paper detail

Active control of emission directionality of semiconductor microdisk lasers

We demonstrate lasing mode selection in nearly circular semiconductor microdisks by shaping the spatial profile of optical pump. Despite of strong mode overlap, adaptive pumping suppresses all lasing modes except the targeted one. Due to slight deformation of the cavity shape and boundary roughness, each lasing mode has distinct emission pattern. By selecting different mode to be the dominant lasing mode, we can switch both the lasing frequency and the output direction. Such tunability by external pump after the laser is fabricated enhances the functionality of semiconductor microcavity lasers.

preprint2014arXivOpen access
Seng Fatt LiewBrandon ReddingLi GeGlenn S. SolomonHui Cao
physics.optics
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Seng Fatt LiewBrandon ReddingLi GeGlenn S. SolomonHui Cao

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