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Spin Noise Spectroscopy of a Single Spin Using Single Detected Photons
M Gundín1, P Hilaire1, C Millet1
1Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, 91120 Palaiseau, France.
Physical Review Letters
|February 10, 2025
Summary
Researchers developed a novel spin noise spectroscopy method using single photon detection. This technique extracts giant spin noise signals from single-hole spins, enabling ultrafast measurements.
Area of Science:
- Quantum physics
- Solid-state physics
- Spectroscopy
Background:
- Spin noise spectroscopy is a key technique for studying spin dynamics in atomic and solid-state systems.
- Current methods may have limitations in probing certain spin behaviors nonperturbatively.
Purpose of the Study:
- To demonstrate a new approach to spin noise spectroscopy utilizing single photon detection.
- To extract giant spin noise signals from single-hole spins using quantum dot devices.
Main Methods:
- Experimental demonstration of a novel spin noise spectroscopy technique.
- Utilizing a quantum dot-micropillar device for large spin-dependent polarization rotations.
- Detecting single photons and analyzing photon-photon cross-correlations.
Main Results:
- Successfully extracted giant spin noise signals from single-hole spins.
- Demonstrated the effectiveness of single photon detection in spin noise spectroscopy.
- Achieved large spin-dependent polarization rotations via the quantum dot device.
Conclusions:
- The new single photon-based spin noise spectroscopy is a powerful tool for probing spin dynamics.
- This technique offers a pathway to extend spin noise spectroscopy into the ultrafast regime.
- Potential for probing mechanisms on the scale of tens of picoseconds.
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