Multiphoton excitation in spin split two-dimensional electron gas

作者：Gumber Sukirti^*; Kumar Manoj; Jha Pradip Kumar; Mohan Man

来源：Physics Letters, Section A: General, Atomic and Solid State Physics , 2015, 379(47-48): 3155-3160.

DOI：10.1016/j.physleta.2015.10.018

• Multiphoton process
• Rashba spin-orbit interaction
• Floquet formalism

The terahertz radiation induced multiphoton excitation processes have been studied in a two dimensional electron gas where the mixing of spin-up and spin-down states of neighbouring Landau levels by Rashba spin orbit interaction results in two new, unequally spaced energy branches. The multiphoton transitions between different quasi-spin branches of electron gas are found to be dominant over transitions involving the states from the same branch. It has been observed that enhancement and power-broadening of absorption spectrum can be effectively tuned by strength and frequency of the laser field as well as the spin-orbit coupling.

• 出版日期2015-12-18