Broadband optical absorption in a two-dimensional electron gas in the presence of spin-orbit interaction and high magnetic fields

Authors

C H Yang, Nanjing University of Science and TechnologyFollow
Wen Xu, Chinese Academy of Sciences
Chao Zhang, Australian National UniversityFollow
Z Zeng, Chinese Academy of Sciences
J Zhang, University of Wollongong
C S Tang, Academia Sinica

RIS ID

22646

Publication Details

Yang, C., Xu, W., Zhang, J., Zeng, Z., Zhang, C. & Tang, C. (2008). Broadband optical absorption in a two-dimensional electron gas in the presence of spin-orbit interaction and high magnetic fields. Physica E: Low-Dimensional Systems and Nanostructures, 40 1896-1898.

Abstract

We examine the selection rules for electronphoton interaction in a two-dimensional electron gas (2DEG) in the presence of theRashba spinorbit interaction (RSOI) and quantizing magnetic fields. In such a case, new channels open up for electronic transitionaccompanied by the absorption of photons. As a result, two absorption peaks and a broadband absorption spectrum can be observed forhigh-mobility samples at relatively high magnetic fields. We find that electronic transitions between the neighboring Landau levels withinthe same spin orientation are the main channels for optical absorption in a spinsplit 2DEG.