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Related Experiment Videos

Towards a picosecond transform-limited nitrogen-vacancy based single photon source.

Chun-Hsu Su1, Andrew D Greentree, Lloyd C L Hollenberg

  • 1Quantum Communications Victoria, School of Physics, The University of Melbourne, Victoria 3010, Australia. chsu@ph.unimelb.edu.au

Optics Express
|June 12, 2008
PubMed
Summary
This summary is machine-generated.

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We developed a nitrogen-vacancy (NV) center single-photon source using cavity enhancement. This method significantly improves single-photon purity and emission probability for quantum applications.

Area of Science:

  • Quantum Optics
  • Solid-State Physics
  • Materials Science

Background:

  • Nitrogen-vacancy (NV) centers in diamond are promising solid-state qubits.
  • Single-photon sources are crucial for quantum communication and computing.
  • Cavity quantum electrodynamics can enhance light-matter interactions.

Purpose of the Study:

  • To analyze the performance of an NV-center-based single-photon source.
  • To optimize the cavity-NV center system for enhanced single-photon emission.
  • To suppress unwanted optical transitions for improved purity.

Main Methods:

  • Master equation and quantum trajectory methods were used for analysis.
  • Strong coupling of the NV center to a high-finesse optical cavity (Q ~ 10^4-10^5, V ~ λ^3).

Related Experiment Videos

  • Sub-picosecond optical excitation was employed.

    • Main Results:

    • Achieved an effective lifetime of 70 ps.
    • Observed a narrow linewidth of 0.01 nm.
    • Demonstrated near-unit single-photon emission probability.
    • Attained a low multi-photon probability of ~10^-5.

    Conclusions:

    • Cavity Purcell enhancement of the zero-phonon line is effective for single-photon generation.
    • The optimized system exhibits high performance for single-photon source applications.
    • This approach offers a pathway to highly efficient and pure single-photon emitters.