Phys. Rev. Lett. 103, 090603 (2009) [4 pages]Ratchet Effects Induced by Terahertz Radiation in Heterostructures with a Lateral Periodic PotentialSee Also: Erratum Received 11 March 2009; published 28 August 2009 We report on the observation of the Seebeck ratchet effect. The effect is measured in semiconductor heterostructures with a one-dimensional lateral potential excited by terahertz radiation. The photocurrent generation is based on the combined action of a spatially periodic in-plane potential and a spatially modulated light, which gives rise to a modulation of the local temperature. In addition to the polarization-independent current due to the Seebeck ratchet effect, we observe a photon helicity dependent response and propose a microscopic mechanism to interpret the experimental findings. © 2009 The American Physical Society 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
See AlsoErratum: P. Olbrich, E. L. Ivchenko, R. Ravash, T. Feil, S. D. Danilov, J. Allerdings, D. Weiss, D. Schuh, W. Wegscheider, and S. D. Ganichev, Erratum: Ratchet Effects Induced by Terahertz Radiation in Heterostructures with a Lateral Periodic Potential [Phys. Rev. Lett. 103, 090603 (2009)], Phys. Rev. Lett. 103, 199901 (2009). |
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.