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Two-photon interference from silicon-vacancy centers in remote nanodiamonds.

Richard Waltrich¹, Marco Klotz¹, Viatcheslav N Agafonov²

¹Institute for Quantum Optics, Ulm University, 89081 Ulm, Germany.

Nanophotonics (Berlin, Germany)

|December 5, 2024

Summary

Researchers achieved indistinguishable photon generation from remote silicon-vacancy centers in nanodiamonds. This breakthrough in quantum technology enables efficient optical coupling for hybrid photonic devices.

Keywords:

nanodiamonds quantum optics silicon-vacancy center

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Area of Science:

Quantum Optics
Solid-State Physics
Materials Science

Background:

Indistinguishable photon generation is crucial for quantum technologies.
Nanoscale solid-state hosts offer efficient optical coupling but limit spectral properties.
This spectral limitation hinders photon indistinguishability.

Purpose of the Study:

To demonstrate two-photon interference from remote silicon-vacancy centers in nanodiamonds.
To overcome spectral limitations in nanoscale quantum emitters.
To enable hybrid quantum technologies using indistinguishable single-photon sources.

Main Methods:

Utilizing negatively charged silicon-vacancy centers in nanodiamonds.
Implementing Hong-Ou-Mandel interference measurements.
Characterizing spectral properties and interference efficiency.

Main Results:

Achieved 61% Hong-Ou-Mandel interference efficiency.
Observed a coalescence time window of 0.35 nanoseconds.
Demonstrated a high yield of silicon-vacancy centers with indistinguishable optical transitions.

Conclusions:

Successfully generated indistinguishable photons from remote nanodiamond emitters.
Validated the potential of silicon-vacancy centers for scalable quantum applications.
Paved the way for hybrid quantum technologies leveraging nanodiamond-based single-photon sources.