Bibliographic Details
| Title: |
Tunable exciton-optomechanical coupling in suspended monolayer MoSe2 |
| Authors: |
Xie, Hongchao, Jiang, Shengwei, Rhodes, Daniel A., Hone, James C., Shan, Jie, Mak, Kin Fai |
| Publication Year: |
2021 |
| Collection: |
Condensed Matter |
| Subject Terms: |
Condensed Matter - Mesoscale and Nanoscale Physics |
| More Details: |
The strong excitonic effect in monolayer transition metal dichalcogenide (TMD) semiconductors has enabled many fascinating light-matter interaction phenomena. Examples include strongly coupled exciton-polaritons and nearly perfect atomic monolayer mirrors. The strong light-matter interaction also opens the door for dynamical control of mechanical motion through the exciton resonance of monolayer TMDs. Here we report the observation of exciton-optomechanical coupling in a suspended monolayer MoSe2 mechanical resonator. By moderate optical pumping near the MoSe2 exciton resonance, we have observed optical damping and anti-damping of mechanical vibrations as well as the optical spring effect. The exciton-optomechanical coupling strength is also gate-tunable. Our observations can be understood in a model based on photothermal backaction and gate-induced mirror symmetry breaking in the device structure. The observation of gate-tunable exciton-optomechanical coupling in a monolayer semiconductor may find applications in nanoelectromechanical systems (NEMS) and in exciton-optomechanics. |
| Document Type: |
Working Paper |
| DOI: |
10.1021/acs.nanolett.0c05089 |
| Access URL: |
http://arxiv.org/abs/2103.09897 |
| Accession Number: |
edsarx.2103.09897 |
| Database: |
arXiv |
