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Rigorous theoretical analysis of a surface-plasmon nanolaser with monolayer MoS2 gain medium

Meng, X; Grote, RR; Jin, W; Dadap, JI; Panoiu, NC; Osgood, RM; (2016) Rigorous theoretical analysis of a surface-plasmon nanolaser with monolayer MoS2 gain medium. Optics Letters , 41 (11) pp. 2636-2639. 10.1364/OL.41.002636. Green open access

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Abstract

Lasers based on monolayer (ML) transition-metal dichalcogenide semiconductor crystals have the potential for low threshold operation and a small device footprint; however, nanophotonic engineering is required to maximize the interaction between the optical fields and the three-atom-thick gain medium. Here, we develop a theoretical model to design a direct bandgap optically pumped nanophotonic integrated laser. Our device utilizes a gap-surface-plasmon optical mode to achieve subwavelength optical confinement and consists of a high-index GaP nanowire atop an ML MoS2 film on an Ag substrate. The optical field and material medium are analyzed using a three dimensional finite-difference time-domain method and a first-principles calculation based on the density functional theory, respectively. The nanolaser is designed to have a threshold of ∼0.6  μW under quasi-continuous wave operation on an excitonic transition at room temperature.

Type: Article
Title: Rigorous theoretical analysis of a surface-plasmon nanolaser with monolayer MoS2 gain medium
Open access status: An open access version is available from UCL Discovery
DOI: 10.1364/OL.41.002636
Publisher version: https://doi.org/10.1364/OL.41.002636
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/10055780
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