Leveraging Nanocavity Harmonics for Control of Optical Processes in 2D Semiconductors.


Journal Article

Optical cavities with multiple tunable resonances have the potential to provide unique electromagnetic environments at two or more distinct wavelengths--critical for control of optical processes such as nonlinear generation, entangled photon generation, or photoluminescence (PL) enhancement. Here, we show a plasmonic nanocavity based on a nanopatch antenna design that has two tunable resonant modes in the visible spectrum separated by 350 nm and with line widths of ∼60 nm. The importance of utilizing two resonances simultaneously is demonstrated by integrating monolayer MoS2, a two-dimensional semiconductor, into the colloidally synthesized nanocavities. We observe a 2000-fold enhancement in the PL intensity of MoS2--which has intrinsically low absorption and small quantum yield--at room temperature, enabled by the combination of tailored absorption enhancement at the first harmonic and PL quantum-yield enhancement at the fundamental resonance.

Full Text

Duke Authors

Cited Authors

  • Akselrod, GM; Ming, T; Argyropoulos, C; Hoang, TB; Lin, Y; Ling, X; Smith, DR; Kong, J; Mikkelsen, MH

Published Date

  • May 4, 2015

Published In

Volume / Issue

  • 15 / 5

Start / End Page

  • 3578 - 3584

PubMed ID

  • 25914964

Pubmed Central ID

  • 25914964

Electronic International Standard Serial Number (EISSN)

  • 1530-6992

International Standard Serial Number (ISSN)

  • 1530-6992

Digital Object Identifier (DOI)

  • 10.1021/acs.nanolett.5b01062


  • eng