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Updated: Aug 5, 2025

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A Telecom O-Band Emitter in Diamond.

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Researchers discovered a new diamond color center emitting in the telecom O-band, ideal for quantum technologies and fiber communication. This finding advances quantum applications by enabling longer-distance signal transmission.

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Area of Science:

  • Quantum Information Science
  • Materials Science
  • Photonics

Background:

  • Diamond color centers are crucial for quantum technologies.
  • Existing color centers have emission wavelengths unsuitable for fiber optics and biological imaging.

Purpose of the Study:

  • To report the discovery of a novel color center in diamond.
  • To characterize its optical and spin properties for quantum applications.

Main Methods:

  • Photoluminescence and absorption spectroscopy were used to identify the color center.
  • Transient absorption spectroscopy measured excited state lifetime and spin dynamics.

Main Results:

  • A new color center emitting in the telecom O-band (1221 nm zero-phonon line) was observed in silicon-doped diamond.
  • An excited state lifetime of ~270 ps and evidence of intersystem crossing were measured.

Conclusions:

  • This telecom O-band emitting color center is a promising candidate for quantum communication and sensing.
  • Its properties are compatible with existing fiber optic infrastructure.