Two-dimensional metal-chalcogenide films in tunable optical microcavities

S Schwarz; S Dufferwiel; P M Walker; F Withers; A A P Trichet; M Sich; F Li; E A Chekhovich; D N Borisenko; N N Kolesnikov; K S Novoselov; M S Skolnick; J M Smith; D N Krizhanovskii; A I Tartakovskii

doi:10.1021/nl503312x

Two-dimensional metal-chalcogenide films in tunable optical microcavities

Nano Lett. 2014 Dec 10;14(12):7003-8. doi: 10.1021/nl503312x. Epub 2014 Nov 11.

Authors

S Schwarz¹, S Dufferwiel, P M Walker, F Withers, A A P Trichet, M Sich, F Li, E A Chekhovich, D N Borisenko, N N Kolesnikov, K S Novoselov, M S Skolnick, J M Smith, D N Krizhanovskii, A I Tartakovskii

Affiliation

¹ Department of Physics and Astronomy, University of Sheffield , Sheffield S3 7RH, United Kingdom.

Abstract

Integration of quasi-two-dimensional (2D) films of metal-chalcogenides in optical microcavities permits new photonic applications of these materials. Here we present tunable microcavities with monolayer MoS2 or few monolayer GaSe films. We observe significant modification of spectral and temporal properties of photoluminescence (PL): PL is emitted in spectrally narrow and wavelength-tunable cavity modes with quality factors up to 7400; a 10-fold PL lifetime shortening is achieved, a consequence of Purcell enhancement of the spontaneous emission rate.

Keywords: 2D materials; Molybdenum disulfide; Purcell effect; gallium selenide; photonics; tunable microcavities.

Publication types

Research Support, Non-U.S. Gov't