期刊
NANO LETTERS
卷 22, 期 17, 页码 6923-6929出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c01442
关键词
surface plasmon interference; valleytronic; near-field optics; exciton modulator; array light source
类别
资金
- NSFC
- National Key R&D Program of China
- Fellow-ship of China Postdoctoral Science Foundation
- Natural Science Founda-tion of Jiangsu Province
- CAS Pioneer Hundred Talents Program
- [22102023]
- [2021YFB2800700]
- [2021M700768]
- [2022M710672]
- [BK20220816]
This study introduces in-plane coherent surface plasmonic interference (SPI) field to excite and modulate excitons in two-dimensional materials. Compared to previous direct excitation methods, in-plane SPI offers a more compact spatial volume and an abundance of mode selections, enabling precise manipulation and modulation of excitons.
Excitons in two-dimensional (2D) materials have attracted the attention of the community to develop improved photoelectronic devices. Previous reports are based on direct excitation where the out-of-plane illumination projects a uniform single-mode light spot. However, because of the optical diffraction limit, the minimal spot size is a few micrometers, inhibiting the precise manipulation and control of excitons at the nanoscale level. Herein, we introduced the in-plane coherent surface plasmonic interference (SPI) field to excite and modulate excitons remotely. Compared to the out-of-plane light, a uniform in-plane SPI suggests a more compact spatial volume and an abundance of mode selections for a single or an array of device modulation. Our results not only build up a fundamental platform for operating and encoding the exciton states at the nanoscale level but also provide a new avenue toward all-optical integrated valleytronic chips for future quantum computation and information applications.
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