Laser writing of coherent colour centres in diamond
By Yu-Chen Chen, P. Salter, S. Knauer, L. Weng, A. Frangeskou, C. Stephen, P. Dolan, S. Johnson, B. Green, Gavin W. Morley and 4 more. Nature Photonics, 2016
280 citations recorded by the source corpus.
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.
Subfields: Biomedical Engineering, Computational Mechanics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/cb822755094283a3bf3c2f6f6be317c0791db82a
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Citations in the corpus
- Isolated Spin Qubits in SiC with a High-Fidelity Infrared Spin-to-Photon Interface (2017, unknown): “These results suggest that reducing impurities and annealing any residual crystal damage are promising routes towards achieving linewidths closer to lifetime-limited in SiC divacancies [73,74].”
- Silicon carbide color centers for quantum applications (2020, methodology): “has been based on the use of femtosecond laser writing [119], where single VSi centers in SiC has been created [120]”