We demonstrate the realization of the resonant spin amplification (RSA) effect in Faraday geometry where a magnetic field is applied parallel to the optically induced spin polarization so that no RSA is expected. However, model considerations predict that it can be realized for a central spin interacting with a fluctuating spin environment. As a demonstrator, we choose an ensemble of singly-charged (In,Ga)As/GaAs quantum dots, where the resident electron spins interact with the surrounding nuclear spins. The observation of RSA in Faraday geometry requires intense pump pulses with a high repetition rate and can be enhanced by means of the spin-inertia effect. Potentially, it provides the most direct and reliable tool to measure the longitudinal g factor of the charge carriers.
@article{arxiv.2102.02780,
title = {Resonant spin amplification in Faraday geometry},
author = {P. Schering and E. Evers and V. Nedelea and D. S. Smirnov and E. A. Zhukov and D. R. Yakovlev and M. Bayer and G. S. Uhrig and A. Greilich},
journal= {arXiv preprint arXiv:2102.02780},
year = {2021}
}
Comments
7 pages including 4 figures; 8 pages supplement including 4 figures