Spectral properties and magneto-optical excitations in semiconductor double-rings under Rashba spin-orbit interaction

Abstract

We have numerically solved the Hamiltonian of an electron in a semiconductor double ring subjected to the magnetic flux and Rashba spin-orbit interaction. It is found that the Aharonov-Bohm energy spectrum reveals multi-zigzag periodic structures. The investigations of spin-dependent electron dynamics via Rabi oscillations in two-level and three-level systems demonstrate the possibility of manipulating quantum states. Our results show that the optimal control of photon-assisted inter-ring transitions can be achieved by employing cascade-type and $\Lambda$-type transition mechanisms. Under chirped pulse impulsions, a robust and complete transfer of an electron to the final state is shown to coincide with the estimation of the Landau-Zener formula.

RevTex, 9 pages, 5 figures

References in corpus (2)

• Persistent current in ballistic mesoscopic rings with Rashba spin-orbit coupling
• Energy levels of a parabolically confined quantum dot in the presence of spin-orbit interaction

Cited by in corpus (2)

• Time-dependent magnetotransport of a wave packet in a quantum wire with embedded quantum dots
• Resonant optical electron transfer in one-dimensional multiwell structures