Ratchet Effects Induced by Terahertz Radiation in Heterostructures with a Lateral Periodic Potential

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P. Olbrich,¹ E. L. Ivchenko,² R. Ravash,¹ T. Feil,¹ S. D. Danilov,¹ J. Allerdings,¹ D. Weiss,¹ D. Schuh,¹ W. Wegscheider,¹ and S. D. Ganichev¹
¹Terahertz Center, University of Regensburg, 93040 Regensburg, Germany
²A. F. Ioffe Physico-Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia

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Received 11 March 2009; published 28 August 2009

Wereport on the observation of the Seebeck ratchet effect. Theeffect is measured in semiconductor heterostructures with a one-dimensional lateralpotential excited by terahertz radiation. The photocurrent generation is basedon the combined action of a spatially periodic in-plane potentialand a spatially modulated light, which gives rise to amodulation of the local temperature. In addition to the polarization-independentcurrent due to the Seebeck ratchet effect, we observe aphoton helicity dependent response and propose a microscopic mechanism tointerpret the experimental findings.

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.103.090603
DOI:	10.1103/PhysRevLett.103.090603
PACS:	05.40.-a; 05.60.Gg; 73.63.Hs; 78.67.De 05.40.-a Fluctuation phenomena, random processes, noise, and Brownian motion 05.60.Gg Quantum transport 73.63.Hs Quantum wells (electronic transport) 78.67.De Optical properties of quantum wells YEAR: 2009

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Erratum

Erratum: Ratchet Effects Induced by Terahertz Radiation in Heterostructures with a Lateral Periodic Potential [Phys. Rev. Lett. 103, 090603 (2009)]
P. Olbrich, E. L. Ivchenko, R. Ravash et al.
Phys. Rev. Lett. 103, 199901 (E) (2009)