可调谐光学微腔中的二维金属硫族化合物薄膜
Two-dimensional metal-chalcogenide films in tunable optical microcavities.
作者信息
Schwarz S, Dufferwiel S, Walker P M, Withers F, Trichet A A P, Sich M, Li F, Chekhovich E A, Borisenko D N, Kolesnikov N N, Novoselov K S, Skolnick M S, Smith J M, Krizhanovskii D N, Tartakovskii A I
机构信息
Department of Physics and Astronomy, University of Sheffield , Sheffield S3 7RH, United Kingdom.
出版信息
Nano Lett. 2014 Dec 10;14(12):7003-8. doi: 10.1021/nl503312x. Epub 2014 Nov 11.
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.
将金属硫族化物的准二维（2D）薄膜集成到光学微腔中，可为这些材料带来新的光子学应用。在此，我们展示了含有单层二硫化钼或少数层硒化镓薄膜的可调谐微腔。我们观察到光致发光（PL）的光谱和时间特性有显著改变：PL以光谱窄且波长可调的腔模发射，品质因数高达7400；实现了PL寿命缩短10倍，这是珀塞尔效应增强自发发射率的结果。
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