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Photon Noise Suppression by a Built-in Feedback Loop.

Amran Al-Ashouri1, Annika Kurzmann1, Benjamin Merkel1

  • 1Faculty of Physics and CENIDE , University of Duisburg-Essen , Lotharstrasse 1 , 47057 Duisburg , Germany.

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|December 19, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces a built-in stabilization method for quantum dot single photon sources. It significantly reduces photon noise by nearly 50%, improving indistinguishability for quantum photonic networks.

Keywords:
Quantum dotsquantum opticsresonance fluorescencesemiconductor heterostructuresingle photon sourcetwo-dimensional hole gas

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Area of Science:

  • Quantum optics
  • Solid-state physics
  • Nanotechnology

Background:

  • Quantum photonic networks require high-quality, on-demand single photons.
  • Solid-state single photon sources, like quantum dots, suffer from environmental noise (spin and charge) that degrades photon indistinguishability.

Purpose of the Study:

  • To demonstrate a built-in stabilization approach for single photon streams from quantum dots.
  • To suppress photon noise and enhance indistinguishability for quantum communication applications.

Main Methods:

  • Utilized a micropillar structure containing a two-dimensional hole gas.
  • Employed charge carrier dynamics of the hole gas, fed by tunneling from field-ionized excitons, to influence the quantum dot's emission frequency.
  • Implemented a feedback loop based on local electric field modulation by the hole gas.

Main Results:

  • Achieved a nearly 50% reduction in the standard deviation of photon noise (6 dB noise power reduction).
  • Demonstrated effective noise suppression for frequencies up to 1 kHz in the developed micropillar structure.
  • Showcased the potential for large arrays of single photon emitters with improved photon noise suppression.

Conclusions:

  • The built-in stabilization approach effectively suppresses photon noise in quantum dot single photon sources.
  • This method offers a simple and scalable solution for improving photon indistinguishability in quantum photonic networks.
  • Further device optimization holds promise for achieving higher bandwidth single photon generation.