Strain-localized excitons and highly tunable nanocavity strong coupling in monolayer WSe2

P. James Schuck

doi:10.1117/12.3029867

4 October 2024 Strain-localized excitons and highly tunable nanocavity strong coupling in monolayer WSe₂

P. James Schuck

Author Affiliations +

Proceedings Volume 13117, Enhanced Spectroscopies and Nanoimaging 2024; 1311709 (2024) https://doi.org/10.1117/12.3029867
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Abstract

The advancement of quantum photonic technologies relies on the ability to precisely control the degrees of freedom of optically active states. First, motivated by recent evidence showing that nanowrinkles generate strain-localized room-temperature emitters, we demonstrate a method to intentionally induce wrinkles with collections of stressors. We show that long-range wrinkle direction and position are controllable with patterned array design, forming quantum emitters as evidenced by cryogenic anti-bunched emission. Next, we realize real-time, room-temperature tunable strong plasmon-exciton coupling in 2D semiconductor monolayers enabled by a general approach that combines strain engineering plus force- and voltage-adjustable plasmonic nanocavities. We show that the exciton energy and nanocavity plasmon resonance can be controllably toggled in concert by applying pressure with a plasmonic nanoprobe, allowing in operando control of detuning and coupling strength, with observed Rabi splittings >100 meV. We identify distinct polariton bands and dark polariton states, and map their evolution as a function of nanogap and strain tuning.

Conference Presentation

Citation Download Citation

P. James Schuck "Strain-localized excitons and highly tunable nanocavity strong coupling in monolayer WSe₂", Proc. SPIE 13117, Enhanced Spectroscopies and Nanoimaging 2024, 1311709 (4 October 2024); https://doi.org/10.1117/12.3029867

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