Multiple intrinsically identical single-photon emitters in the solid state

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.