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A Telecom O-Band Emitter in Diamond
Sounak Mukherjee1, Zi-Huai Zhang1, Daniel G Oblinsky2
1Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States.
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.
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.
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