Engineering the Strain and Interlayer Excitons of 2D Materials via Lithographically Engraved Hexagonal Boron Nitride

Yu Chiang Hsieh, Zhen You Lin, Shin Ji Fung, Wen Shin Lu, Sheng Chin Ho, Siang Ping Hong, Sheng Zhu Ho, Chiu Hua Huang, Kenji Watanabe, Takashi Taniguchi, Yang Hao Chan, Yi Chun Chen, Chung Lin Wu, Tse Ming Chen

研究成果: Article同行評審

摘要

Strain engineering has quickly emerged as a viable option to modify the electronic, optical, and magnetic properties of 2D materials. However, it remains challenging to arbitrarily control the strain. Here we show that, by creating atomically flat surface nanostructures in hexagonal boron nitride, we achieve an arbitrary on-chip control of both the strain distribution and magnitude on high-quality molybdenum disulfide. The phonon and exciton emissions are shown to vary in accordance with our strain field designs, enabling us to write and draw any photoluminescence color image in a single chip. Moreover, our strain engineering offers a powerful means to significantly and controllably alter the strengths and energies of interlayer excitons at room temperature. This method can be easily extended to other material systems and offers promise for functional excitonic devices.

原文English
頁(從 - 到)7244-7251
頁數8
期刊Nano letters
23
發行號15
DOIs
出版狀態Published - 2023 8月 9

All Science Journal Classification (ASJC) codes

  • 生物工程
  • 一般化學
  • 一般材料科學
  • 凝聚態物理學
  • 機械工業

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