TY - JOUR

T1 - Magnetoresistance oscillations induced by high-intensity terahertz radiation

AU - Herrmann, T.

AU - Kvon, Z. D.

AU - Dmitriev, I. A.

AU - Kozlov, D. A.

AU - Jentzsch, B.

AU - Schneider, M.

AU - Schell, L.

AU - Bel'Kov, V. V.

AU - Bayer, A.

AU - Schuh, D.

AU - Bougeard, D.

AU - Kuczmik, T.

AU - Oltscher, M.

AU - Weiss, D.

AU - Ganichev, S. D.

N1 - Publisher Copyright: © 2017 American Physical Society.

PY - 2017/9/27

Y1 - 2017/9/27

N2 - We report on observation of pronounced terahertz radiation-induced magnetoresistivity oscillations in AlGaAs/GaAs two-dimensional electron systems, the terahertz analog of the microwave induced resistivity oscillations (MIRO). Applying high-power radiation of a pulsed molecular laser we demonstrate that MIRO, so far observed at low power only, are not destroyed even at very high intensities. Experiments with radiation intensity ranging over five orders of magnitude from 0.1 to 104W/cm2 reveal high-power saturation of the MIRO amplitude, which is well described by an empirical fit function I/(1+I/Is)β with β∼1. The saturation intensity Is is of the order of tens of watts per square centimeter and increases by a factor of 6 by increasing the radiation frequency from 0.6 to 1.1 THz. The results are discussed in terms of microscopic mechanisms of MIRO and compared to nonlinear effects observed earlier at significantly lower excitation frequencies.

AB - We report on observation of pronounced terahertz radiation-induced magnetoresistivity oscillations in AlGaAs/GaAs two-dimensional electron systems, the terahertz analog of the microwave induced resistivity oscillations (MIRO). Applying high-power radiation of a pulsed molecular laser we demonstrate that MIRO, so far observed at low power only, are not destroyed even at very high intensities. Experiments with radiation intensity ranging over five orders of magnitude from 0.1 to 104W/cm2 reveal high-power saturation of the MIRO amplitude, which is well described by an empirical fit function I/(1+I/Is)β with β∼1. The saturation intensity Is is of the order of tens of watts per square centimeter and increases by a factor of 6 by increasing the radiation frequency from 0.6 to 1.1 THz. The results are discussed in terms of microscopic mechanisms of MIRO and compared to nonlinear effects observed earlier at significantly lower excitation frequencies.

KW - 2-DIMENSIONAL ELECTRON-GAS

KW - CYCLOTRON-RESONANCE

KW - DEEP IMPURITIES

KW - TUNNEL IONIZATION

KW - PHOTOCONDUCTIVITY

KW - HETEROSTRUCTURES

KW - SEMICONDUCTORS

KW - RELAXATION

KW - RESISTANCE

KW - SYSTEMS

UR - http://www.scopus.com/inward/record.url?scp=85030108239&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.96.115449

DO - 10.1103/PhysRevB.96.115449

M3 - Article

AN - SCOPUS:85030108239

VL - 96

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 11

M1 - 115449

ER -