Excitonic Resonant Emission–Absorption of Surface Plasmons in Transition Metal Dichalcogenides for Chip-Level Electronic–Photonic Integrated Circuits

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• 作者：Zhuan Zhu ; Jiangtan Yuan ; Haiqing Zhou ; Jonathan Hu ; Jing Zhang ; Chengli Wei ; Fang Yu ; Shuo Chen ; Yucheng Lan ; Yao Yang ; Yanan Wang ; Chao Niu ; Zhifeng Ren ; Jun Lou ; Zhiming Wang ; Jiming Bao
• 刊名：ACS Photonics
• 出版年：2016
• 出版时间：May 18, 2016
• 年：2016
• 卷：3
• 期：5
• 页码：869-874
• 全文大小：622K
• 年卷期：0
• ISSN：2330-4022

文摘

The monolithic integration of electronics and photonics has attracted enormous attention due to its potential applications. A major challenge to this integration is the identification of suitable materials that can emit and absorb light at the same wavelength. In this paper we utilize unique excitonic transitions in WS₂ monolayers and show that WS₂ exhibits a perfect overlap between its absorption and photoluminescence spectra. By coupling WS₂ to Ag nanowires, we then show that WS₂ monolayers are able to excite and absorb surface plasmons of Ag nanowires at the same wavelength of exciton photoluminescence. This resonant absorption by WS₂ is distinguished from that of the ohmic propagation loss of silver nanowires, resulting in a short propagation length of surface plasmons. Our demonstration of resonant optical generation and detection of surface plasmons enables nanoscale optical communication and paves the way for on-chip electronic–photonic integrated circuits.