Tunable interlayer excitons and switchable interlayer trions via dynamic near-field cavity

Yeonjeong Koo; Hyeongwoo Lee; Tatiana Ivanova; Ali Kefayati; Vasili Perebeinos; Ekaterina Khestanova; Vasily Kravtsov; Kyoung-Duck Park

doi:10.1038/s41377-023-01087-5

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Tunable interlayer excitons and switchable interlayer trions via dynamic near-field cavity

Original Articles

- Tunable interlayer excitons and switchable interlayer trions via dynamic near-field cavity
- Tunable interlayer excitons and switchable interlayer trions via dynamic near-field cavity
- 光：科学与应用 2023年12卷第3期页码：425-434
- Affiliations：
  
  1.Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
  2.School of Physics and Engineering, ITMO University, Saint Petersburg, 197101, Russia
  3.Department of Electrical Engineering, University at Buffalo, New York, NY, 14260, USA
- Author bio：
  
  Vasily Kravtsov (vasily.kravtsov@metalab.ifmo.ru)
  Kyoung-Duck Park (parklab@postech.ac.kr)
- Funds：
- DOI：10.1038/s41377-023-01087-5
  中图分类号：
- 纸质出版日期：2023-3-31，
  
  网络出版日期：2023-3-3，
  
  收稿日期：2022-6-30，
  
  修回日期：2023-1-7，
  
  录用日期：2023-2-1
Scan for full text
Tunable interlayer excitons and switchable interlayer trions via dynamic near-field cavity[J]. 光：科学与应用, 2023,12(3):425-434.

Koo, Y. et al. Tunable interlayer excitons and switchable interlayer trions via dynamic near-field cavity. Light: Science & Applications, 12, 425-434 (2023).
Tunable interlayer excitons and switchable interlayer trions via dynamic near-field cavity[J]. 光：科学与应用, 2023,12(3):425-434. DOI： 10.1038/s41377-023-01087-5.

Koo, Y. et al. Tunable interlayer excitons and switchable interlayer trions via dynamic near-field cavity. Light: Science & Applications, 12, 425-434 (2023). DOI： 10.1038/s41377-023-01087-5.

摘要

Abstract

Emerging photo-induced excitonic processes in transition metal dichalcogenide (TMD) heterobilayers

e.g.

interplay of intra- and inter-layer excitons and conversion of excitons to trions

allow new opportunities for ultrathin hybrid photonic devices. However

with the associated large degree of spatial heterogeneity

understanding and controlling their complex competing interactions in TMD heterobilayers at the nanoscale remains a challenge. Here

we present an all-round dynamic control of interlayer-excitons and -trions in a WSe

/Mo

0.5

heterobilayer using multifunctional tip-enhanced photoluminescence (TEPL) spectroscopy with

20 nm spatial resolution. Specifically

we demonstrate the bandgap tunable interlayer excitons and the dynamic interconversion between interlayer-trions and -excitons

through the combinational tip-induced engineering of GPa-scale pressure and plasmonic hot electron injection

with simultaneous spectroscopic TEPL measurements. This unique nano-opto-electro-mechanical control approach provides new strategies for developing versatile nano-excitonic/trionic devices using TMD heterobilayers.

关键词

Keywords

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