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Related Experiment Videos

Increased pump acceptance bandwidth in spontaneous parametric downconversion process using Bragg reflection

Krishna Thyagarajan1, Ritwick Das, Olivier Alibart

  • 1Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India. ktrajan@physics.iitd.ac.in

Optics Express
|June 11, 2008
PubMed
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Researchers developed a novel Bragg reflection waveguide (BRW) for efficient photon pair generation. This technology enables broad pump bandwidth with narrow signal bandwidth, crucial for quantum information processing.

Area of Science:

  • Quantum optics
  • Materials science
  • Waveguide technology

Background:

  • Efficient photon pair generation is essential for quantum information processing.
  • Bragg reflection waveguides (BRWs) offer potential for tailored optical properties.
  • Controlling dispersion is key to optimizing nonlinear optical processes in waveguides.

Purpose of the Study:

  • To demonstrate efficient photon pair generation using a tailored Bragg reflection waveguide (BRW).
  • To achieve a large pump bandwidth while maintaining a narrow signal bandwidth.
  • To propose a novel waveguide structure for compact and stable quantum sources.

Main Methods:

  • Designing a Bragg reflection waveguide (BRW) with a high index core.
  • Utilizing a periodically poled Gallium Nitride (GaN) core.

Related Experiment Videos

  • Employing a periodically stratified cladding composed of Al(0.02)Ga(0.98)N and Al(0.45)Ga(0.55)N layers.

    • Main Results:

    • Successful tailoring of BRW dispersion characteristics.
    • Achieved efficient photon pair generation over a large pump bandwidth.
    • Maintained a narrow signal bandwidth, crucial for quantum applications.

    Conclusions:

    • The proposed BRW structure enables efficient photon pair generation with desirable bandwidth properties.
    • This technology is suitable for realizing compact and stable quantum information processing sources.
    • Tailoring waveguide dispersion is a critical factor for advanced quantum optical devices.