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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
12:19

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Published on: April 4, 2017

Entanglement generation using silicon photonic wire waveguide.

Hiroki Takesue1, Ken-Ichi Harada, Hiroshi Fukuda

  • 1NTT Basic Research Laboratories, NTT Corporation, 243-0198 Japan.

Journal of Nanoscience and Nanotechnology
|April 2, 2010
PubMed
Summary

Silicon waveguides enable efficient generation of telecom-band entangled photon pairs using spontaneous four-wave mixing (SFWM). This method overcomes noise issues, demonstrating high-purity time-bin and polarization entanglement.

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Area of Science:

  • Quantum optics
  • Nanophotonics
  • Quantum information science

Background:

  • Spontaneous four-wave mixing (SFWM) is a key process for generating entangled photon pairs.
  • Traditional methods using dispersion-shifted fiber suffer from noise photons due to spontaneous Raman scattering.
  • Silicon photonic wire waveguides offer enhanced nonlinearity for efficient photon-pair generation.

Purpose of the Study:

  • To review recent advancements in telecom-band entangled photon-pair sources.
  • To highlight the advantages of using silicon photonic wire waveguides for entanglement generation.
  • To demonstrate high-purity entanglement in both time-bin and polarization domains.

Main Methods:

  • Utilizing spontaneous four-wave mixing (SFWM) in nano-scale silicon waveguides.
  • Leveraging the high third-order nonlinearity of silicon.
  • Employing 1-cm long silicon waveguides for photon-pair generation.

Main Results:

  • Efficient generation of telecom-band entangled photon pairs.
  • Suppression of noise photons from spontaneous Raman scattering, a common issue in fiber-based sources.
  • Successful demonstration of high-purity time-bin and polarization entanglement.

Conclusions:

  • Silicon photonic wire waveguides are a promising platform for developing advanced quantum communication technologies.
  • The demonstrated approach offers a robust method for generating high-quality entangled photons in the telecom band.
  • This work paves the way for practical applications in quantum networks and quantum information processing.