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Room temperature nanocavity laser with interlayer excitons in 2D heterostructures. | LitMetric

Room temperature nanocavity laser with interlayer excitons in 2D heterostructures.

Sci Adv

Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore.

Published: April 2019

AI Article Synopsis

Article Abstract

Atomically thin layered two-dimensional (2D) materials have provided a rich library for both fundamental research and device applications. Bandgap engineering and controlled material response can be achieved from artificial heterostructures. Recently, excitonic lasers have been reported using transition metal dichalcogenides; however, the emission is still the intrinsic energy bandgap of the monolayers. Here, we report a room temperature interlayer exciton laser with MoS/WSe heterostructures. The onset of lasing was identified by the distinct kink in the "L-L" curve and the noticeable spectral linewidth collapse. Different from visible emission of intralayer excitons in monolayer components, our laser works in the infrared range, which is fully compatible with the well-established technologies in silicon photonics. Long lifetime of interlayer excitons relaxes the requirement of the cavity quality factor by orders of magnitude. Room temperature interlayer exciton lasers might open new perspectives for developing coherent light sources with tailored optical properties on silicon photonics platforms.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6486267PMC
http://dx.doi.org/10.1126/sciadv.aav4506DOI Listing

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