Premium
Dynamics of Light‐Triggered Gunn‐Domain Structure: Domain Multiplication and Current Oscillations
Author(s) -
Subačius L.,
Jarašiūnas K.,
Starikov E.,
Gružinskis V.,
Shiktorov P.
Publication year - 1997
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(199711)204:1<473::aid-pssb473>3.0.co;2-n
Subject(s) - nanosecond , gunn diode , electric field , picosecond , time domain , physics , field (mathematics) , microwave , monte carlo method , modulation (music) , optics , materials science , optoelectronics , laser , statistics , mathematics , diode , quantum mechanics , computer science , acoustics , pure mathematics , computer vision
In the present work we analyze the evolution of a periodical high‐field domain structure, triggered by picosecond or nanosecond light pulses in biased GaAs and InP bulk crystals. We applied a full‐hydrodynamic model as well as the Monte Carlo technique to calculate hot carrier transport of nonuniformly heated and spatially modulated carrier plasma. Time‐resolved spatial profiles of carrier and internal electric field distribution revealed Gunn‐domain splitting and its multiplication to new carrier and field gratings in microwave field. In dc field, coherent drift and fusion of Gunn‐domain structure lead to oscillations of the total current which frequency depends on light intensity and modulation.