Spin-orbit coupling and the topology of gases of spin-degenerate cold excitons in photoexcited GaAs-AlGaAs quantum wells

• المؤلفون الرئيسيون: Matuszewski, M., Liew, Timothy Chi Hin, Rubo, Y. G., Kavokin, A. V.
• مؤلفون آخرون: School of Physical and Mathematical Sciences
• التنسيق: مقال
• اللغة: English
• منشور في: 2017
• الموضوعات: Quantum wells; Excitons
• الوصول للمادة أونلاين: https://hdl.handle.net/10356/85892; http://hdl.handle.net/10220/43890
• المؤسسة: Nanyang Technological University

We calculate the spatial structure of four-component spinor systems of mixed bright and dark exciton condensates in coupled quantum wells. The spin-dependent bright-dark exciton conversion and Dresselhaus spin-orbit coupling is found to generate a rich variety of topological elements. By propagating the Gross-Pitaevskii equation in imaginary time, we observe the following: single and multiple polarized vortices; the phase separation of bright and dark excitons; and exotic spatial structures in density and spin polarization.