材料科学
半导体
异质结
基质(水族馆)
应变工程
压电
光电子学
光子学
二硒化钨
硅
复合材料
化学
过渡金属
海洋学
地质学
催化作用
生物化学
作者
Chitraleema Chakraborty,Arunabh Mukherjee,Hee–Jong Moon,Kumarasiri Konthasinghe,Liangyu Qiu,Wenhui Hou,Tara Peña,Carla Watson,Stephen M. Wu,Dirk Englund,Nick Vamivakas
出处
期刊:Optica
[The Optical Society]
日期:2020-05-27
卷期号:7 (6): 580-580
被引量:13
标识
DOI:10.1364/optica.377886
摘要
Strain engineering is a natural route to control the electronic and optical properties of two-dimensional (2D) materials. Recently, 2D semiconductors have also been demonstrated as an intriguing host of strain-induced quantum-confined emitters with unique valley properties inherited from the host semiconductor. Here, we study the continuous and reversible tuning of the light emitted by such localized emitters in a monolayer tungsten diselenide embedded in a van der Waals heterostructure. Biaxial strain is applied on the emitters via strain transfer from a lead magnesium niobate–lead titanate (PMN-PT) piezoelectric substrate. Efficient modulation of the emission energy of several localized emitters up to 10 meV has been demonstrated on application of a voltage on the piezoelectric substrate. Further, we also find that the emission axis rotates by ∼ 40 ∘ as the magnitude of the biaxial strain is varied on these emitters. These results elevate the prospect of using all electrically controlled devices where the property of the localized emitters in a 2D host can be engineered with elastic fields for an integrated opto-electronics and nano-photonics platform.
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