What is it about?

We present a single-photon source in polycrystalline diamond membrane. An optical spectroscopy approach allows to beat technological difficulties to realize polarised single photons from silicon-vacancy color centers in diamond membranes at room temperature.

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Why is it important?

Silicon-vacancy color center has been identified as a promising single-photon source as it exhibits strong emission and operation both at room and higher temperatures. Its polarized emission also allows application for instance in quantum cryptography and quantum frequency conversion. Our platform holds promise for introducing polycrystalline diamond to integrated quantum photonics, hybrid quantum systems, and other complex functional materials.


Applications usually require the single-photon sources from color centers in diamond to be integrated into quantum photonics. However, both experimental- and technological difficulties make the operation at ambient conditions extremely challenging. Polycrystalline diamond membranes would facilitate photonics integration hence also leveraging cavity QED effects to enhance the source to operate at ambient conditions.

Dr. Assegid Mengistu Flatae
Universitat Siegen

Read the Original

This page is a summary of: Single-photon emission from silicon-vacancy color centers in polycrystalline diamond membranes, Applied Physics Letters, February 2024, American Institute of Physics,
DOI: 10.1063/5.0191665.
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