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Multiple intrinsically identical single-photon emitters in the solid state.

L J Rogers1, K D Jahnke1, T Teraji2

  • 1Institute for Quantum Optics and Center for Integrated Quantum Science and Technology (IQst), Ulm University, Albert-Einstein-Allee 11, Ulm D-89081, Germany.

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Researchers created identical single-photon emitters in diamond, achieving 91% spectral overlap. This breakthrough advances quantum technologies by enabling scalable and complex quantum optics and cryptography applications.

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Area of Science:

  • Quantum optics
  • Solid-state physics
  • Quantum technology

Background:

  • Indistinguishable single-photon emitters are vital for quantum technologies.
  • Scalability in quantum optics requires multiple identical emitters.
  • Current solid-state emitters lack intrinsic spectral similarity, needing complex correction methods.

Purpose of the Study:

  • To develop intrinsically identical single-photon emitters for scalable quantum technologies.
  • To overcome spectral dissimilarities in current solid-state emitters.
  • To demonstrate high spectral overlap and narrow linewidths in new emitters.

Main Methods:

  • Fabrication of silicon vacancy (SiV(-)) centers in low-strain bulk diamond.
  • Characterization of spectral properties of individual SiV(-) emitters.
  • Measurement of spectral overlap and excitation linewidths.

Main Results:

  • Demonstrated bright SiV(-) centers in bulk diamond.
  • Achieved unprecedented spectral overlap of up to 91% between distinct emitters.
  • Observed nearly transform-limited excitation linewidths, indicating high spectral purity.

Conclusions:

  • This study presents the first solid-state single-photon emitters with intrinsically identical spectral properties.
  • The findings pave the way for scalable quantum optics, quantum cryptography, and advanced quantum information processing.
  • The developed SiV(-) emitters offer a promising platform for future quantum technological applications.