Circular Dichroism Control of Tungsten Diselenide (WSe2) Atomic Layers with Plasmonic Metamolecules
AuthorsLin, Hsiang Ting
Chang, Chiao Yun
Cheng, Pi Ju
Cheng, Chia Chin
Chang, Shu Wei
Chu, Chih Wei
Wei, Pei Kuen
Shih, Min Hsiung
KAUST DepartmentMaterial Science and Engineering Program
Physical Science and Engineering (PSE) Division
Online Publication Date2018-04-16
Print Publication Date2018-05-09
Permanent link to this recordhttp://hdl.handle.net/10754/630388
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AbstractControlling circularly polarized 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 dichalcogenide (TMDC) exhibit intrinsic circularly polarized emissions and are potential chiroptical materials for ultrathin circularly polarized photon sources. In this work, we demonstrated circularly polarized photon sources of TMDC with device thicknesses approximately 50 nm. Circularly polarized photoluminescence from atomic layers of tungsten diselenide (WSe) was precisely controlled with chiral meta-molecules, and the optical chirality of WSe was enhanced more than 4 times by integrating with the meta-molecules. 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 circularly polarized photon was realized. These ultrathin devices are suitable for important applications such as the optical information technology and chip-scale bio-sensing.
CitationLin H-T, Chang C-Y, Cheng P-J, Li M-Y, Cheng C-C, et al. (2018) Circular Dichroism Control of Tungsten Diselenide (WSe2) Atomic Layers with Plasmonic Metamolecules. ACS Applied Materials & Interfaces 10: 15996–16004. Available: http://dx.doi.org/10.1021/acsami.8b01472.
SponsorsThe authors would like to thank the Center for NanoScience and Technology in National Chiao Tung University (NCTU) for the fabrication facilities. This work was supported by the Innovative Materials and Analysis Technology Exploration Program (IMATE) of Academia Sinica and the Ministry of Science and Technology in Taiwan under the contract number MOST 105-2112-M-001-011-MY3.
PublisherAmerican Chemical Society (ACS)