Germanium-Vacancy Single Color Centers in Diamond
Takayuki Iwasaki1, Fumitaka Ishibashi2, Yoshiyuki Miyamoto3
11] Department of Physical Electronics, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan [2] CREST, Japan Science and Technology Agency, Chiyoda, Tokyo.
Scientific Reports
|August 8, 2015
Summary
Researchers discovered a new germanium-vacancy (GeV) color center in diamond, functioning as a bright single photon source. This defect offers a promising avenue for quantum technologies, with reproducible fabrication methods demonstrated.
Area of Science:
- Quantum Information Science
- Materials Science
- Solid-State Physics
Background:
- Atomic-sized fluorescent defects in diamond are crucial for quantum applications.
- High-intensity, reproducible single photon sources are needed for quantum cryptography and information processing.
Purpose of the Study:
- To report a novel color center in diamond for single photon emission.
- To characterize the optical and structural properties of this new defect.
Main Methods:
- Fabrication of the novel color center using ion implantation and chemical vapor deposition.
- Optical characterization of photoluminescence and single photon emission.
- First-principles calculations for atomic structure and energy levels.
Main Results:
- Discovery of the germanium-vacancy (GeV) color center with a zero-phonon line at 602 nm at room temperature.
- Demonstration of the GeV center as an efficient single photon source.
- Successful fabrication via ion implantation and chemical vapor deposition.
Conclusions:
- The GeV center is a promising new solid-state platform for quantum applications.
- Reproducible fabrication methods make the GeV center suitable for scalable quantum technologies.
- Theoretical calculations provide insight into the atomic structure and electronic properties of the GeV center.
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