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

Journal Article · · Nano Letters
 [1];  [2];  [3];  [4];  [2];  [2];  [5];  [2];  [5]
  1. Center for Metamaterials and Integrated Plasmonics, Duke University, Durham, North Carolina 27708, United States, Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, United States
  2. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
  3. Center for Metamaterials and Integrated Plasmonics, Duke University, Durham, North Carolina 27708, United States, Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, United States, Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
  4. Center for Metamaterials and Integrated Plasmonics, Duke University, Durham, North Carolina 27708, United States, Department of Physics, Duke University, Durham, North Carolina 27708, United States
  5. Center for Metamaterials and Integrated Plasmonics, Duke University, Durham, North Carolina 27708, United States, Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, United States, Department of Physics, Duke University, Durham, North Carolina 27708, United States

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. Here, 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.

Research Organization:
Energy Frontier Research Centers (EFRC), Washington, D.C. (United States). Center for Excitonics (CE)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001088
OSTI ID:
1179500
Alternate ID(s):
OSTI ID: 1210697
Journal Information:
Nano Letters, Journal Name: Nano Letters Vol. 15 Journal Issue: 5; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 170 works
Citation information provided by
Web of Science

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