Surface lattice resonance lasers with epitaxial InP gain medium
arxiv(2024)
摘要
Surface lattice resonance (SLR) lasers, where gain is supplied by a thin film
active material and the feedback comes from multiple scattering by plasmonic
nanoparticles, have shown both low threshold lasing and tunability of the
angular and spectral emission. However, typically used materials such as
organic dyes and QD films suffer from photo-degradation which hampers practical
applications. Here, we demonstrate photo-stable single-mode lasing of SLR modes
sustained in an epitaxial solid-state InP slab waveguide. The nanoparticle
array is weakly coupled to the optical modes, which decreases the scattering
losses and hence the experimental lasing threshold is as low as 90
μJ/cm^2. The nanoparticle periodicity defines the lasing wavelength and
enables tuneable emission wavelengths over a 70 nm spectral range. Combining
plasmonic nanoparticles with an epitaxial solid-state gain medium paves the way
for large-area on-chip integrated SLR lasers for applications including optical
communication, optical computing, sensing, and LiDAR.
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