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

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)7244-7251
Number of pages8
JournalNano letters
Volume23
Issue number15
DOIs
Publication statusPublished - 2023 Aug 9

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering

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