Quasistatic and dynamic interaction of high-frequency fields with miniband electrons in semiconductor superlattices

Autor:	H.-J. Regl, Stephan Winnerl, D.G. Pavel'ev, Yu. Koschurinov, Stefan Ivanov, A.D. Semenov, B. Melzer, Ekkehard Schomburg, P. S. Kop’ev, Karl Friedrich Renk, V. Ustinov, Jörg Grenzer, A. A. Ignatov, S. Schaposchnikov
Rok vydání:	1997
Předmět:	Physics Field (physics) Condensed matter physics Terahertz radiation Superlattice Semiconductor superlattices Bloch oscillations Electron Negative differential conductance Quasistatic process
Zdroj:	Physical Review B. 56:10303-10307
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.56.10303
Popis:	We studied the interaction of high-frequency (HF) fields with the miniband electrons in semiconductor superlattices that show (at room temperature) negative differential conductance. We observed a field-induced reduction of current through the superlattices, with a different bias dependence for fields below and above a characteristic frequency (1 THz). An analysis based on Bloch oscillations, indicating that the electrons relaxed within one cycle of the HF field (quasistatic interaction) or followed the field adiabatically (dynamic interaction), allows one to extract the intraminiband relaxation time ${(10}^{\ensuremath{-}13}\mathrm{s}).$
Databáze:	OpenAIRE
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