Journal
SCIENCE ADVANCES
Volume 5, Issue 4, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aav4506
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Funding
- Singapore National Research Foundation through a Singapore 2015 NRF fellowship grant and its Competitive Research Program (CRP) [NRF-NRFF2015-03, NRF-CRP14-2014-02]
- Singapore Ministry of Education [RG119/17(s), MOE2016-T2-2-077, MOE2016-T3-1-006 (S)]
- A*Star QTE Programme from NTU [M4081441]
- UK Engineering and Physical Sciences Research Council [EP/M009122/1]
- National Key R\&D Program of China [2018YFA0306100]
- National Natural Science Foundation of China [11874437, 11761131001, 11674402, 91750207]
- Guangzhou Science and Technology Project [201805010004]
- Natural Science Foundation of Guangdong [2018B030311027]
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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 MoS2/WSe2 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 laserworks in the infrared range, which is fully compatiblewith 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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