Электронный каталог

Статья

Nazmitdinov, R.G.
Floquet-Rashba Spin Interferometer: Highly Sensitive All-Optical Control of Resonant Transport via Strong Light-Matter Coupling / R.G.Nazmitdinov, M.Pudlak, N.D.Tung. – Text: electronic // Physical Review B. – 2026. – Vol. 114, No. 12. – P. 125404. – URL: https://doi.org/10.1103/ysmg-rzx1. – Bibliogr.: 55.

We investigate ballistic electron transport through a one-dimensional Rashba quantum ring coupled to two quantum point contacts and driven by an off-resonant high-frequency electric field. Based on the Floquet effective Hamiltonian and the scattering matrix formalism, we propose an all-optical spin modulator that operates without external magnetic fields. We demonstrate that the synergy between Floquet engineering and the resonant geometry of the ring enables a full spin-flip transition at significantly reduced driving intensities. This resonant amplification provides an efficient alternative to traditional spin-control methods. Analytical conditions for the transmission peaks are derived, showing that the high-frequency field acts as an “optical flux” that can double the spin conductance magnitude compared to conventional magnetic tuning. Our findings establish the Floquet-Rashba ring as a scalable, intensity-efficient building block for next-generation spintronic circuits. Notably, while the core spin-modulating and switching features operate efficiently at zero external magnetic field, we show that a weak static magnetic flux can be employed as a complementary diagnostic tool to tune and map the coexisting Floquet, geometric, and Aharonov-Bohm interference phases.



ОИЯИ = ОИЯИ (JINR)2026