Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session F17: Spectroscopy in Space and Time III; Super-resolution and Advanced Imaging
8:00 AM–11:00 AM,
Tuesday, March 7, 2023
Room: Room 209
Sponsoring
Unit:
DCP
Chair: David Osborn, Sandia National Laboratories
Abstract: F17.00002 : Site-controlled coupling between plasomonic nanostructures and strain-localized excitons in nano-indented WSe2
8:36 AM–8:48 AM
Presenter:
Paul D Cunningham
(United States Naval Research Laboratory)
Authors:
Nicholas V Proscia
(United States Naval Research Laboratory)
Blake S Simpkins
(United States Naval Research Laboratory)
Samuel W LaGasse
(United State Naval Research Laboratory)
Dante J O'Hara
(United States Naval Research Laboratory)
Hsun-Jen Chuang
(United States Naval Research Laboratory)
Kathleen M McCreary
(United States Naval Research Laboratory)
Igor Vurgaftman
(United States Naval Research Laboratory)
Berend T Jonker
(United States Naval Research Laboratory)
Paul D Cunningham
(United States Naval Research Laboratory)
Here we achieve site-controlled coupling between the localized surface plasmon resonance (LSPR) of Au discs and strain-localized excitons in WSe2. We employ nano-indentation using an atomic force microscope (AFM) to create on-demand spatially localized excitons that display quantum emission. The exciton-plasmon coupling is characterized by mode-splitting of the scattering spectra, indicating fast energy exchange between the two systems. The LSPR wavelength is tuned via disc diameter in order to map the avoided crossing between the LSPR and exciton resonances. The observed coupling strength approaches the strong coupling regime at room temperature. Our results establish this system as a potential platform for novel quantum light sources in which to study coherent control as well as nonlinear exciton-plasmon polariton behavior.
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