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Related Experiment Video

Updated: Dec 29, 2025

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Controlling Excitons in an Atomically Thin Membrane with a Mirror.

You Zhou1,2, Giovanni Scuri2, Jiho Sung1,2

  • 1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.

Physical Review Letters
|February 1, 2020
PubMed
Summary
This summary is machine-generated.

We dynamically controlled light interactions with atomically thin semiconductors using a metallic mirror. This electromechanical method tunes exciton properties in molybdenum diselenide (MoSe2) for advanced optical applications.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Optics

Background:

  • Atomically thin semiconductors like molybdenum diselenide (MoSe2) exhibit unique excitonic properties.
  • Exciton-photon coupling is crucial for controlling light-matter interactions in quantum devices.

Purpose of the Study:

  • To demonstrate dynamic manipulation of optical responses in MoSe2 monolayers.
  • To explore electromechanical control over exciton-photon coupling.

Main Methods:

  • Suspended MoSe2 monolayers integrated into van der Waals heterostructures.
  • Interfacing the MoSe2 heterostructure with a metallic mirror.
  • Electromechanically tuning the distance between the heterostructure and the mirror.

Main Results:

  • Achieved spatially homogeneous, lifetime-broadened excitons in suspended MoSe2.
  • Demonstrated controllable and reversible modulation of exciton absorption and emission.
  • Showcased dynamic control over exciton-photon coupling by altering the photonic density of states.

Conclusions:

  • Electromechanical tuning of exciton dynamics in flexible, thin semiconductors is feasible.
  • This approach offers new possibilities for cavity quantum optomechanics, nonlinear quantum optics, and topological photonics.