Step-like multi-photon absorption in two-dimensional semiconductors with Rashba spin-orbit coupling in terahertz regime

Authors

Yee Sin Ang, University of WollongongFollow
Chao Zhang, University of WollongongFollow

RIS ID

96318

Publication Details

Ang, Y. & Zhang, C. (2014). Step-like multi-photon absorption in two-dimensional semiconductors with Rashba spin-orbit coupling in terahertz regime. International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz (pp. 1-1). United States: IEEE.

Abstract

We show that due to Rashba spin-orbit coupling two-dimensional semiconductors can exhibit strong nonlinear optical response in the terahertz frequency regime. The spin-split of the parabolic energy band in semiconductors allows multiple-photon process to occur via inter-subband transitions. The steplike edges in the optical process correspond to the cut-off effect produced by the multiple-photon process.