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Nanowire Quantum Dot Surface Engineering for High Temperature Single Photon Emission.

Peng Yu1,2, Ziyuan Li2, Tongwei Wu1

  • 1Institute of Fundamental and Frontier Sciences , University of Electronic Science and Technology of China , Chengdu 610054 , P. R. China.

ACS Nano
|November 6, 2019
PubMed
Summary

High-temperature single photon emission is achieved using "surface-free" gallium arsenide quantum dots in nanowires. These emitters demonstrate photon antibunching up to 160 K, overcoming a key challenge for optical communication.

Keywords:
nanowirephoton antibunchingquantum dotsingle photon sourcesurface engineering

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Area of Science:

  • Semiconductor Nanostructures
  • Quantum Optics
  • Materials Science

Background:

  • Generating single photons at high temperatures is crucial for optical communication technologies.
  • Group III-As and III-P materials face challenges in high-temperature single photon emission.

Purpose of the Study:

  • To develop a high-temperature single photon emitter.
  • To overcome limitations of traditional III-V materials for quantum applications.

Main Methods:

  • Utilized self-catalyzed vapor-liquid-solid growth for "surface-free" gallium arsenide quantum dots (QDs) within gallium arsenide phosphide nanowires.
  • Employed simple surface engineering techniques to enhance optical signal.
  • Characterized photoluminescence and photon statistics at elevated temperatures.

Main Results:

  • Achieved highly polarized photoluminescence at 750 nm from the "surface-free" QD nanowire system.
  • Demonstrated photon antibunching behavior up to 160 K.
  • Observed well-resolved exciton lines at temperatures as high as 220 K.

Conclusions:

  • "Surface-free" quantum dot nanowires offer a promising solution for high-temperature single photon generation.
  • The developed approach significantly enhances optical performance and temperature stability for quantum emitters.
  • This advancement is critical for the advancement of high-temperature quantum communication devices.