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Updated: Jul 20, 2025

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
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Quantum Light from Lossy Semiconductor Rydberg Excitons.

Valentin Walther1,2, Anders S Sørensen3

  • 1ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA.

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|August 4, 2023
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Summary
This summary is machine-generated.

Semiconductor Rydberg excitons, weakly coupled to light, generate quantum light through excitation blockade. This phenomenon enables pair-wise polariton scattering, producing protected, antibunched photons even with losses.

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Area of Science:

  • Quantum optics
  • Solid-state physics
  • Semiconductor science

Background:

  • Quantum correlations typically require strong emitter-photon coupling.
  • Weakly coupled systems usually do not exhibit quantum light phenomena.

Purpose of the Study:

  • To demonstrate quantum light generation from weakly coupled semiconductor Rydberg excitons.
  • To investigate the underlying mechanism of excitation blockade and polariton scattering.

Main Methods:

  • Utilizing semiconductor Rydberg excitons with weak coupling to free-space light.
  • Analyzing photon statistics and scattering properties.
  • Investigating the role of excitation blockade and polariton scattering.

Main Results:

  • Achieved strongly antibunched fields (quantum light) from weakly coupled excitons.
  • Observed pair-wise polariton scattering induced by excitation blockade.
  • Demonstrated robustness of the effect against phonon coupling and nonradiative decay.

Conclusions:

  • Weakly coupled semiconductor excitons can produce quantum light.
  • Excitation blockade is a viable mechanism for quantum light generation in such systems.
  • Opens new avenues for quantum optics in semiconductor platforms.