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Intrinsic complications in the analysis of optical-pump, terahertz probe experiments

Nienhuys, Han-Kwang LU and Sundström, Villy LU (2005) In Physical Review B (Condensed Matter and Materials Physics) 71(23). p.8-235110
Abstract
A general formalism is presented for the interpretation of experiments in which a laser pulse (or pump pulse) creates charge carriers that are subsequently probed by a broadband THz pulse (or probe pulse). The time dependence of the sample properties is described in terms of the conductivity (,), where the dependence on frequency describes the intrinsic properties of the charge carriers and the dependence on pump-probe delay describes their population dynamics. It is shown that there are significant complications in obtaining this quantity from experimental data for values comparable to the charge carrier response time. Also, in transient THz absorption experiments, fast dynamics in the measured signals may be observed that do not... (More)
A general formalism is presented for the interpretation of experiments in which a laser pulse (or pump pulse) creates charge carriers that are subsequently probed by a broadband THz pulse (or probe pulse). The time dependence of the sample properties is described in terms of the conductivity (,), where the dependence on frequency describes the intrinsic properties of the charge carriers and the dependence on pump-probe delay describes their population dynamics. It is shown that there are significant complications in obtaining this quantity from experimental data for values comparable to the charge carrier response time. Also, in transient THz absorption experiments, fast dynamics in the measured signals may be observed that do not necessarily reflect sample dynamics. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
71
issue
23
pages
8 - 235110
publisher
American Physical Society
external identifiers
  • wos:000230276800033
  • scopus:28344451181
ISSN
1098-0121
DOI
10.1103/PhysRevB.71.235110
language
English
LU publication?
yes
id
13ba1f5a-baf0-45d5-9397-2d0383e5fa4c (old id 157816)
date added to LUP
2007-07-03 14:29:18
date last changed
2017-10-01 04:49:08
@article{13ba1f5a-baf0-45d5-9397-2d0383e5fa4c,
  abstract     = {A general formalism is presented for the interpretation of experiments in which a laser pulse (or pump pulse) creates charge carriers that are subsequently probed by a broadband THz pulse (or probe pulse). The time dependence of the sample properties is described in terms of the conductivity (,), where the dependence on frequency describes the intrinsic properties of the charge carriers and the dependence on pump-probe delay describes their population dynamics. It is shown that there are significant complications in obtaining this quantity from experimental data for values comparable to the charge carrier response time. Also, in transient THz absorption experiments, fast dynamics in the measured signals may be observed that do not necessarily reflect sample dynamics.},
  author       = {Nienhuys, Han-Kwang and Sundström, Villy},
  issn         = {1098-0121},
  language     = {eng},
  number       = {23},
  pages        = {8--235110},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Intrinsic complications in the analysis of optical-pump, terahertz probe experiments},
  url          = {http://dx.doi.org/10.1103/PhysRevB.71.235110},
  volume       = {71},
  year         = {2005},
}