Engineering radiative coupling of excitons in 2D semiconductors

Jason Horng*, Yu Hsun Chou, Tsu Chi Chang, Chu Yuan Hsu, Tien Chang Lu, Hui Deng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The resonance energy and the transition rate of atoms, molecules, and solids were understood as their intrinsic properties in classical electromagnetism. It was later realized that these quantities are linked to the radiative coupling between the transition dipole and photon modes. Such effects can be greatly amplified in macroscopic many-body systems from virtual photon exchange between dipoles, but are often masked by inhomogeneity and pure dephasing, especially in solids. Here, we observe in both absorption and emission spectroscopy the renormalization of the exciton resonance and the radiative decay rate in transition metal dichalcogenides monolayers due to their radiative interactions. Tuning the photon mode density near the monolayer, we demonstrate control of cooperative Lamb shift, radiative decay, and valley polarization of the excitons as well as control of the charged exciton emission. Our work establishes a technologically accessible and robust experimental system for engineering cooperative matter–light interactions.

Original languageEnglish
Pages (from-to)1443-1448
Number of pages6
JournalOptica
Volume6
Issue number11
DOIs
StatePublished - 1 Jan 2019

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