Enhanced Emission from Interlayer Excitons Coupled to Plasmonic Gap Cavities

Thinh N. Tran, Sejeong Kim, Simon J.U. White, Minh Anh Phan Nguyen, Licheng Xiao, Stefan Strauf, Tieshan Yang, Igor Aharonovich, Zai Quan Xu

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The emergence of interlayer excitons (IEs) from atomic layered transition metal dichalcogenides (TMDCs) heterostructures has drawn tremendous attention due to their unique and exotic optoelectronic properties. Coupling the IEs into optical cavities provides distinctive electromagnetic environments which plays an important role in controlling multiple optical processes such as optical nonlinear generation or photoluminescence enhancement. Here, the integration of IEs in TMDCs into plasmonic nanocavities based on a nanocube on a metallic mirror is reported. Spectroscopic studies reveal an order of magnitude enhancement of the IE at room temperature and a 5-time enhancement in fluorescence at cryogenic temperatures. Cavity modeling reveals that the enhancement of the emission is attributed to both increased excitation efficiency and Purcell effect from the cavity. The results show a novel method to control the excitonic processes in TMDC heterostructures to build high performance photonics and optoelectronics devices.

Original languageEnglish
Article number2103994
JournalSmall
Volume17
Issue number45
DOIs
StatePublished - 11 Nov 2021

Keywords

  • heterostructures
  • interlayer excitons
  • plasmonic gap cavities
  • transition metal dichalcogenide

Fingerprint

Dive into the research topics of 'Enhanced Emission from Interlayer Excitons Coupled to Plasmonic Gap Cavities'. Together they form a unique fingerprint.

Cite this