研究目的
Investigating the controlled charge transfer to and from dark states in high density ensembles of SiV centers in a diamond nano-pyramid and demonstrating close to lifetime-limited linewidths from these centers.
研究成果
The study demonstrates close to lifetime-limited emission from a high density ensemble of SiV centers in a diamond nano-pyramid using resonant photoluminescence excitation and charge state transfer. This opens new avenues for applications in quantum technologies, biological sensing, and nanoscale thermometry.
研究不足
The study is limited by the need for nitrogen impurities to observe the charge state conversion effect, and the inability to directly observe the PL of SiV0 centers due to poor detection efficiency at 946 nm.
1：Experimental Design and Method Selection:
The study uses resonant photoluminescence excitation and a frequency-selective persistent hole burning technique to investigate SiV centers in diamond nano-pyramids.
2：Sample Selection and Data Sources:
CVD grown Artech Carbon AFM tips with ensembles of SiV? centers at the apex were used.
3：List of Experimental Equipment and Materials:
A homebuilt confocal microscope at cryogenic temperatures, green laser (532 nm), and resonant laser (737 nm) were employed.
4：Experimental Procedures and Operational Workflow:
The study involved turning on and off green and resonant lasers to observe photoluminescence and charge state conversion.
5：Data Analysis Methods:
The photoluminescence count rates were analyzed as a function of laser powers and exposure times to understand charge state dynamics.
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