標題: Circular Dichroism Control of Tungsten Diselenide (WSe2) Atomic Layers with Plasmonic Metamolecules
作者: Lin, Hsiang-Ting
Chang, Chiao-Yun
Cheng, Pi-Ju
Li, Ming-Yang
Cheng, Chia-Chin
Chang, Shu-Wei
Li, Lance L. J.
Chu, Chih-Wei
Wei, Pei-Kuen
Shih, Min-Hsiung
光電工程學系
Department of Photonics
關鍵字: two-dimensional materials;transition metal dichalcogenides (TMDCs);WSe2;surface plasmon;metaswface;chirality;circular dichroism
公開日期: 9-May-2018
摘要: Controlling circularly polarized (CP) states of light is critical to the development of functional devices for key and emerging applications such as display technology and quantum communication, and the compact circular polarization-tunable photon source is one critical element to realize the applications in the chip-scale integrated system. The atomic layers of transition metal dichalcogenides (TMDCs) exhibit intrinsic CP emissions and are potential chiroptical materials for ultrathin CP photon sources. In this work, we demonstrated CP photon sources of TMDCs with device thicknesses approximately 50 nm. CP photoluminescence from the atomic layers of tungsten diselenide (WSe2) was precisely controlled with chiral metamolecules (MMs), and the optical chirality of WSe2 was enhanced more than 4 times by integrating with the MMs. Both the enhanced and reversed circular dichroisms had been achieved. Through integrations of the novel gain material and plasmonic structure which are both low-dimensional, a compact device capable of efficiently manipulating emissions of CP photon was realized. These ultrathin devices are suitable for important applications such as the optical information technology and chip-scale biosensing.
URI: http://dx.doi.org/10.1021/acsami.8b01472
http://hdl.handle.net/11536/144990
ISSN: 1944-8244
DOI: 10.1021/acsami.8b01472
期刊: ACS APPLIED MATERIALS & INTERFACES
Volume: 10
起始頁: 15996
結束頁: 16004
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