Cargando…

Room temperature nanocavity laser with interlayer excitons in 2D heterostructures

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 transi...

Descripción completa

Detalles Bibliográficos
Autores principales: Liu, Yuanda, Fang, Hanlin, Rasmita, Abdullah, Zhou, Yu, Li, Juntao, Yu, Ting, Xiong, Qihua, Zheludev, Nikolay, Liu, Jin, Gao, Weibo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6486267/
https://www.ncbi.nlm.nih.gov/pubmed/31032409
http://dx.doi.org/10.1126/sciadv.aav4506
Descripción
Sumario: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(2)/WSe(2) 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.