THz-Driven Floquet Spin Valve-Modulator
Abstract
Within the scattering matrix (S-matrix) framework adapted to the high-frequency Floquet--Magnus formalism based on the length gauge, we investigate spin-dependent quantum transport in a 1D quantum ring with an asymmetric (π/2) configuration of quantum point contacts. We demonstrate the realization of a contactless electromagnetic analog of the Datta--Das spin field-effect transistor with ferromagnetic leads operating at zero static magnetic field. It is shown that an off-resonance terahertz (THz) field enables high-precision switching between spin channels without altering the static parameters of the nanostructure. Driven by an electronic Vernier effect, the quantum interference in the asymmetric geometry yields a selective spin phase rotator alongside an ultra-high-contrast current-suppression regime (``optical shutter''). The proposed architecture is fundamentally robust against multiphoton leakage sidebands, offering a thermally immune, high-speed alternative to conventional semiconductor static spin transistors.
Related
- Floquet-Sambe Bottleneck and Frequency-Selective Localization in a Driven Synthetic Spin Chain
- Detuning the Floquet anomalous chiral spin liquid
- Floquet spin-group theory for light-tailored spin splitting in collinear magnets
- Floquet-Volkov spin polarization in spin-degenerate Antiferromagnets
- From Approximate Floquet Engineering to Full Floquet Theory: Coherent Control of Chiral Spin Systems in Spintronics
BibTeX
@misc{nazmitdinov2026thzdriven,
title = {{THz-Driven Floquet Spin Valve-Modulator}},
author = {R. G. Nazmitdinov},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2607.19897},
eprint = {2607.19897},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2607.19897},
}
RIS
TY - UNPB
TI - THz-Driven Floquet Spin Valve-Modulator
AU - R. G. Nazmitdinov
PY - 2026
DA - 2026/10/26
PB - arXiv
DO - 10.48550/arxiv.2607.19897
UR - https://arxiv.org/abs/2607.19897
AB - Within the scattering matrix (S-matrix) framework adapted to the high-frequency Floquet--Magnus formalism based on the length gauge, we investigate spin-dependent quantum transport in a 1D quantum ring with an asymmetric (π/2) configuration of quantum point contacts. We demonstrate the realization of a contactless electromagnetic analog of the Datta--Das spin field-effect transistor with ferromagnetic leads operating at zero static magnetic field. It is shown that an off-resonance terahertz (THz) field enables high-precision switching between spin channels without altering the static parameters of the nanostructure. Driven by an electronic Vernier effect, the quantum interference in the asymmetric geometry yields a selective spin phase rotator alongside an ultra-high-contrast current-suppression regime (``optical shutter''). The proposed architecture is fundamentally robust against multiphoton leakage sidebands, offering a thermally immune, high-speed alternative to conventional semiconductor static spin transistors.
ER -