We present a time-resolved optical technique to measure electron spin dynamics with GHz dynamical bandwidth, transform-limited spectral selectivity, and phase-sensitive (lock-in) detection. Use of a continuous-wave (CW) laser and fast optical bridge enables greatly improved signal-to-noise characteristics compared to traditional optical sampling (pump-probe) techniques. We demonstrate the technique with a measurement of GHz-spin precession in n-GaAs. This approach may be applicable to other physical systems where stroboscopic techniques cannot be used because of either noise or spectral limitations.
Irvin, Patrick; Fodor, Petru S.; and Levy, Jeremy, "Gigahertz Optical Spin Transceiver" (2007). Physics Faculty Publications. 117.
Irvin, Patrick, Petru S. Fodor, and Jeremy Levy. "Gigahertz Optical Spin Transceiver." Optics Express 15 (2007): 11756-11762.
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