Laser writing of coherent colour centres in diamond
Abstrak
A negatively charged nitrogen–vacancy centre — a promising quantum light source — is created in diamond by laser writing (with pulses with a central wavelength of 790 nm and duration of 300 fs) with an accuracy of 200 nm in the transverse plane. Optically active point defects in crystals have gained widespread attention as photonic systems that could be applied in quantum information technologies1,2. However, challenges remain in the placing of individual defects at desired locations, an essential element of device fabrication. Here we report the controlled generation of single negatively charged nitrogen–vacancy (NV−) centres in diamond using laser writing3. Aberration correction in the writing optics allows precise positioning of the vacancies within the diamond crystal, and subsequent annealing produces single NV− centres with a probability of success of up to 45 ± 15%, located within about 200 nm of the desired position in the transverse plane. Selected NV− centres display stable, coherent optical transitions at cryogenic temperatures, a prerequisite for the creation of distributed quantum networks of solid-state qubits. The results illustrate the potential of laser writing as a new tool for defect engineering in quantum technologies, and extend laser processing to the single-defect domain.
Topik & Kata Kunci
Penulis (14)
Yu-Chen Chen
P. Salter
S. Knauer
L. Weng
A. Frangeskou
C. Stephen
P. Dolan
S. Johnson
B. Green
Gavin W. Morley
M. Newton
J. Rarity
M. Booth
Jason M. Smith
Akses Cepat
- Tahun Terbit
- 2016
- Bahasa
- en
- Total Sitasi
- 270×
- Sumber Database
- Semantic Scholar
- DOI
- 10.1038/nphoton.2016.234
- Akses
- Open Access ✓