Coherent control of cyclotron emission from a semiconductor using sub-picosecond electric field transients
作者:
P. G. Huggard,
J. A. Cluff,
C. J. Shaw,
S. R. Andrews,
E. H. Linfield,
D. A. Ritchie,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 71,
issue 18
页码: 2647-2649
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.120167
出版商: AIP
数据来源: AIP
摘要:
We have demonstrated the excitation and control of coherent cyclotron emission from a semiconductor using a THz beam containing pairs of sub-picosecond electric field pulses closely spaced in time. The source of THz radiation in these experiments is a biased coplanar stripline fabricated on semi-insulating GaAs and edge illuminated with pairs of temporally and spatially separated 70 fs pulses of near infrared light. A GaAs/AlGaAs two-dimensional electron gas was used in the experiments because of its long intraband phase relaxation time. Changes in the amplitude and phase of the cyclotron emission are observed when varying the interpulse delay and are well described within the theoretical framework of a two level system. ©1997 American Institute of Physics.
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