High-Q lasing via all-dielectric Bloch-surface-wave platform

Yang-Chun Lee, Ya-Lun Ho, Bo-Wei Lin, Mu-Hsin Chen, Di Xing, Hirofumi Daiguji and Jean-Jacques Delaunay ()
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Yang-Chun Lee: The University of Tokyo
Ya-Lun Ho: The University of Tokyo
Bo-Wei Lin: The University of Tokyo
Mu-Hsin Chen: The University of Tokyo
Di Xing: The University of Tokyo
Hirofumi Daiguji: The University of Tokyo
Jean-Jacques Delaunay: The University of Tokyo

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract Controlling the propagation and emission of light via Bloch surface waves (BSWs) has held promise in the field of on-chip nanophotonics. BSW-based optical devices are being widely investigated to develop on-chip integration systems. However, a coherent light source that is based on the stimulated emission of a BSW mode has yet to be developed. Here, we demonstrate lasers based on a guided BSW mode sustained by a gain-medium guiding structure microfabricated on the top of a BSW platform. A long-range propagation length of the BSW mode and a high-quality lasing emission of the BSW mode are achieved. The BSW lasers possess a lasing threshold of 6.7 μJ/mm2 and a very narrow linewidth reaching a full width at half maximum as small as 0.019 nm. Moreover, the proposed lasing scheme exhibits high sensitivity to environmental changes suggesting the applicability of the proposed BSW lasers in ultra-sensitive devices.

Date: 2023
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DOI: 10.1038/s41467-023-41471-8

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