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We present a theoretical study on the effect of radiation on themangetoresistance of two-dimensional electron systems with strong Rashbaspint-orbit coupling. We want to study the interplay between two well-knowneffects in these electron systems: the radiation-induced resistanceoscillations and the typical beating pattern of systems with intense Rashbainteraction. We analytically derive an exact solution for the electron wavefunction corresponding to a total Hamiltonian with Rashba and radiation terms.We consider a perturbation treatment for elastic scattering due to chargedimpurities to finally obtain the magnetoresistance of the system. Withoutradiation we recover a beating pattern in the amplitude of the Shubnikov deHass oscillations: a set of nodes and antinodes in the magnetoresistance. Inthe presence of radiation this beating pattern is strongly modified followingthe profile of radiation-induced magnetoresistance oscillations. We study theirdependence on intensity and frequency of radiation, including the teraherztregime.

Radiation-induced resistance oscillations in 2D electron systems with strong Rashba coupling