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Operating single quantum emitters with a compact Stirling cryocooler.

A Schlehahn1, L Krüger1, M Gschrey1

  • 1Institute of Solid State Physics, Technische Universität Berlin, 10623 Berlin, Germany.

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This summary is machine-generated.

Compact Stirling cryocoolers enable operation of single quantum dots for quantum information technology. This user-friendly setup provides a viable alternative to traditional cryostats for generating single photons.

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Area of Science:

  • Quantum Information Technology
  • Nanophotonics
  • Quantum Optics

Background:

  • Single-photon sources are crucial for quantum information technology.
  • Traditional cryostats for quantum dot operation can be expensive and cumbersome.
  • Compact and user-friendly cooling solutions are needed for nanophotonics applications.

Purpose of the Study:

  • To investigate the application of a compact Stirling cryocooler for operating single quantum emitters.
  • To demonstrate the feasibility of using Stirling cryocoolers in nanophotonics for quantum optics experiments.
  • To compare the performance of Stirling-cooled quantum dots with those in traditional cryostats.

Main Methods:

  • Utilized a compact Stirling cryocooler to cool a semiconductor quantum dot (QD) below 30 K.
  • Employed vibration-decoupled free-space micro-photoluminescence spectroscopy to analyze charge-carrier states.
  • Performed a Hanbury-Brown and Twiss experiment to measure multi-photon emission suppression (g((2))(0)).

Main Results:

  • Achieved base temperatures below 30 K using the Stirling cryocooler.
  • Demonstrated strong suppression of multi-photon emission (g((2))(0) < 0.04) from the Stirling-cooled QD.
  • Obtained results comparable to those from liquid helium-flow cryostats at equivalent temperatures.

Conclusions:

  • Low-vibration Stirling cryocoolers are a practical and attractive alternative to conventional cryostats for nanophotonics.
  • This technology can facilitate the development of high-quality, table-top non-classical light sources.
  • The user-friendly nature of Stirling cryocoolers may accelerate advancements in quantum information technology.