Far-infrared excitations in rectangular antidot arrays - art. no. 033316

Authors
Hochgrafe, M van Zyl, BP Heyn, C Heitmann, D Zaremba, E
Citation
M. Hochgrafe et al., Far-infrared excitations in rectangular antidot arrays - art. no. 033316, PHYS REV B, 6303(3), 2001, pp. 3316
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6303
Issue
3
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010115)6303:3<3316:FEIRAA>2.0.ZU;2-H
Abstract
We have investigated far-infrared excitations in rectangular arrays of anti dots in modulation-doped AlxGa1-xAs-GaAs heterostructures. In the rectangul ar antidot lattice the degeneracy of modes of a square array is lifted and a rich spectrum of higher-frequency modes is excited, particularly at small magnetic fields. These modes are sensitive to the direction of linear pola rized radiation. Our experimental results are compared with theoretical cal culations based on the Thomas-Fermi-Dirac-von Weizsacker hydrodynamic theor y.