Frequency doubling and tripling of terahertz radiation in a GaAs/AlAs superlattice due to frequency modulation of Bloch oscillations

Authors
Winnerl, S Schomburg, E Brandl, S Kus, O Renk, KF Wanke, MC Allen, SJ Ignatov, AA Ustinov, V Zhukov, A Kop'ev, PS
Citation
S. Winnerl et al., Frequency doubling and tripling of terahertz radiation in a GaAs/AlAs superlattice due to frequency modulation of Bloch oscillations, APPL PHYS L, 77(9), 2000, pp. 1259-1261
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
77
Issue
9
Year of publication
2000
Pages
1259 - 1261
Database
ISI
SICI code
0003-6951(20000828)77:9<1259:FDATOT>2.0.ZU;2-F
Abstract
We report on frequency doubling and tripling of THz radiation in a voltage- biased GaAs/AlAs superlattice. By use of a corner cube antenna system, radi ation from the Santa Barbara free-electron laser (frequency 0.7 THz) was gu ided into a superlattice mesa element and the second and third harmonic wer e coupled out of the mesa. Without bias only radiation of the third harmoni c was generated, while the biased superlattice emitted radiation of both th e second and third harmonic. We attribute the harmonic generation to freque ncy modulation of damped Bloch oscillations of the miniband electrons in th e superlattice. (C) 2000 American Institute of Physics. [S0003-6951(00)0353 5-X].