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Coherent Lattice Vibrations in Bi and Sb

Published online by Cambridge University Press:  15 February 2011

J. Vidal ,
T. K. Cheng ,
H. J. Zeiger ,
G. Dresselhaus ,
M. S. Dresselhaus  and
E. P. Ippen
J. Vidal
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge MA 02139
T. K. Cheng
Affiliation:
Department of Electrical Engineering and Computer Science, MIT, Cambridge MA 02139
H. J. Zeiger
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge MA 02139
G. Dresselhaus
Affiliation:
Francis Bitter National Magnet Laboratory, MIT, Cambridge MA 02139
M. S. Dresselhaus
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge MA 02139 Department of Electrical Engineering and Computer Science, MIT, Cambridge MA 02139
E. P. Ippen
Affiliation:
Department of Electrical Engineering and Computer Science, MIT, Cambridge MA 02139
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Abstract

Femtosecond time-resolved optical techniques have been shown to generate coherent phonons in some semimetals and narrow gap semiconductors. A previously-reported model describes the mechanism for generation of coherent lattice vibrations via the optically excited carriers. One of the most interesting consequences of such coherent lattice motion is the modulation of the electronic bands - and possibly of the transport properties of the material — at a THz timescale. Preliminary results are given for a band structure calculation, performed to evaluate the magnitude of these laser-induced band shifts.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 329: Symposium R – New Materials for Advanced Solid State Lasers , 1993 , 103
Copyright
Copyright © Materials Research Society 1994

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References

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