4.6 Article

Resonant spin amplification in Faraday geometry

Journal

PHYSICAL REVIEW B
Volume 103, Issue 20, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.103.L201301

Keywords

-

Funding

  1. Deutsche Forschungsgemeinschaft (DFG) [271512359]
  2. RF President Grant [MK-5158.2021.1.2]
  3. DFG [TRR 160]
  4. Russian Foundation for Basic Research [19-52-12038, 20-32-70048]

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The study demonstrates the realization of the resonant spin amplification (RSA) effect in a specific condition, which requires intense pump pulses and can be enhanced by the spin-inertia effect. This method potentially provides the most direct and reliable tool to measure the longitudinal g factor of the charge carriers.
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.

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