Title :
Step-like multi-photon absorption in two-dimensional semiconductors with Rashba spin-orbit coupling in terahertz regime
Author :
Yee Sin Ang ; Chao Zhang
Author_Institution :
Sch. of Phys., Univ. of Wollongong, Wollongong, NSW, Australia
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.
Keywords :
magnetoelectronics; multiphoton processes; nonlinear optics; spin-orbit interactions; 2D semiconductors; Rashba spin-orbit coupling; intersubband transitions; multiple-photon process; nonlinear optical response; parabolic energy band; spin-split; step-like multiphoton absorption; terahertz frequency regime; Conductivity; Couplings; Nonlinear optics; Optical coupling; Optical harmonic generation; Optical sensors; Photonics;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956465
