Optomechanical Enhancement of Doubly Resonant 2D Optical Nonlinearity

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• 作者：Fei Yi ; Mingliang Ren ; Jason C. Reed ; Hai Zhu ; Jiechang Hou ; Carl H. Naylor ; A. T. Charlie Johnson ; Ritesh Agarwal ; Ertugrul Cubukcu
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：March 9, 2016
• 年：2016
• 卷：16
• 期：3
• 页码：1631-1636
• 全文大小：375K
• ISSN：1530-6992

文摘

Emerging two-dimensional semiconductor materials possess a giant second order nonlinear response due to excitonic effects while the monolayer thickness of such active materials limits their use in practical nonlinear devices. Here, we report 3300 times optomechanical enhancement of second harmonic generation from a MoS₂ monolayer in a doubly resonant on-chip optical cavity. We achieve this by engineering the nonlinear light-matter interaction in a microelectro-mechanical system enabled optical frequency doubling device based on an electrostatically tunable Fabry–Perot microresonator. Our versatile optomechanical approach will pave the way for next generation efficient on-chip tunable light sources, sensors, and systems based on molecularly thin materials.