Abstract
Creating a multicolor laser on a single microchip has become a subject of great interest, with white-light lasers as the ultimate goal. This requires a high-quality-factor, multichannel cavity structure supporting the lasing of all elementary colors simultaneously, with strongly enhanced ultralow-threshold emission. The authors present a hybrid microcavity that eliminates background noise and integrates multiple capillaries on a slab, achieving multiwavelength lasing. This broadly tunable multichannel laser should find use in $e.g.$ optical interconnects and multiplexing, multiagent chemical and biological detection, solid-state lighting, solar cells, and superbright microdisplays.
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