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

2007/03/24 by Wen-Hsuan Kuan, Chi-Shung Tang, Chi‐Shung Tang +1 · 2 citations
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.75.155326

published as Phys. Rev. B 75, 155326 (2007) · RevTex, 9 pages, 5 figures

arxiv created 2007/03/24 · openalex publication_date 2007/04/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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 multizigzag 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 \ensuremathΛ-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.

Citations

• Energy levels of a parabolically confined quantum dot in the presence of spin-orbit interaction
• Persistent current in ballistic mesoscopic rings with Rashba spin-orbit coupling
• Spintronics: Fundamentals and applications
• Influence of the shape of quantum dots on their far-infrared absorption
• Inhibited Spontaneous Emission in Solid-State Physics and Electronics

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