Japanese team fabricates single-photon sources in solid matter

The research group resolved the challenging issue attributed to solid crystals, namely widely spread emission wavelengths, and succeeded in fabricating many single-photon sources that emit photons with nearly identical emission wavelengths. Copyright : National Institute for Materials Science (NIMS)

A research group led by Junichi Isoya, professor emeritus, University of Tsukuba and Tokuyuki Teraji, principal researcher, Optical and Electronic Materials Unit, NIMS, has successfully fabricated for the first time in the world single-photon sources of SiV (silicon vacancy) centers – one of the color centers in diamond during the growth of thin film diamond, which have high purity and crystalline quality – by introducing them at extremely low concentrations.

By using this advanced technology to grow diamond thin film, the research group succeeded in fabricating many bright and stable single-photon sources at different locations in a crystal.

Furthermore, the group obtained nearly identical emission spectra, with an spectral overlap of 91 %, between two photons emitted from two single-photon sources that were fabricated at different locations in a crystal.

These results are promising as a key step toward the realization of using single-photon sources in solid matter applied to such fields as quantum optics, quantum computing and quantum information networks that involve quantum interference.

This research was jointly carried out with Fedor Jelezko, a professor at the University of Ulm in Germany, as part of Japan-Germany joint research (in nanoelectronics) on “quantum computing in isotopically engineered diamond,” supported by the JST Strategic International Collaborative Research Program.

The results of this research had been published in the 8-27-2014 issue of Nature Communications (Nature Communications 5, Article number:4739, doi:10.1038/ncomms5739)

Associated links

Media Contact

Mikiko Tanifuji Research SEA News

Further information:


All news from this category: Physics and Astronomy

This area deals with the fundamental laws and building blocks of nature and how they interact, the properties and the behavior of matter, and research into space and time and their structures.

innovations-report provides in-depth reports and articles on subjects such as astrophysics, laser technologies, nuclear, quantum, particle and solid-state physics, nanotechnologies, planetary research and findings (Mars, Venus) and developments related to the Hubble Telescope.

Back to the Homepage

Comments (0)

Write comment

Latest posts

Machine learning at speed

Inserting lightweight optimization code in high-speed network devices has enabled a KAUST-led collaboration to increase the speed of machine learning on parallelized computing systems five-fold. This “in-network aggregation” technology, developed…

The Amazon and the sea

Expedition investigates matter fluxes and food webs in the world’s largest river plume. As the world’s largest river, the Amazon contributes about one-fifth of the global freshwater input to the…

First images of cells exposed to COVID-19 vaccine reveal native-like Coronavirus spikes

New research has for the first time compared images of the protein spikes that develop on the surface of cells exposed to the Oxford-AstraZeneca vaccine to the protein spike of…

Partners & Sponsors