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Nano-scale Schottky contacts: ultrafast drift-diffusion dynamics studied in the optical near field

Achermann, M; Siegner, U; Wernersson, Lars-Erik LU and Keller, U (2002) In Physica E: Low-Dimensional Systems and Nanostructures 13(2-4). p.819-822
Abstract
We present direct measurements of the ultrafast carrier dynamics around buried nano-scale Schottky contacts with high spatial and time resolution, performed with a novel fermosecond near-field scanning optical microscope, It is shown that high optically excited carrier densities screen the built-in field around a Schottky contact and allow for efficient transport of electrons towards the contact, followed by trapping of electrons into the metal. The experimental results are modeled by a self-consistent treatment of the drift-diffusion equation for the carriers and Poisson's equation for the built-in electric field. (C) 2002 Elsevier Science B.V. All rights reserved.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
ultrafast carrier transport, Schottky nano-contacts, near-field optics, W-GaAs
in
Physica E: Low-Dimensional Systems and Nanostructures
volume
13
issue
2-4
pages
819 - 822
publisher
Elsevier
external identifiers
  • wos:000176869100169
  • scopus:0036492699
ISSN
1386-9477
DOI
10.1016/S1386-9477(02)00209-6
language
English
LU publication?
yes
id
9e2e13d7-e194-4032-91db-f4dba7ffed27 (old id 326316)
date added to LUP
2007-08-03 10:45:26
date last changed
2017-01-01 06:45:46
@article{9e2e13d7-e194-4032-91db-f4dba7ffed27,
  abstract     = {We present direct measurements of the ultrafast carrier dynamics around buried nano-scale Schottky contacts with high spatial and time resolution, performed with a novel fermosecond near-field scanning optical microscope, It is shown that high optically excited carrier densities screen the built-in field around a Schottky contact and allow for efficient transport of electrons towards the contact, followed by trapping of electrons into the metal. The experimental results are modeled by a self-consistent treatment of the drift-diffusion equation for the carriers and Poisson's equation for the built-in electric field. (C) 2002 Elsevier Science B.V. All rights reserved.},
  author       = {Achermann, M and Siegner, U and Wernersson, Lars-Erik and Keller, U},
  issn         = {1386-9477},
  keyword      = {ultrafast carrier transport,Schottky nano-contacts,near-field optics,W-GaAs},
  language     = {eng},
  number       = {2-4},
  pages        = {819--822},
  publisher    = {Elsevier},
  series       = {Physica E: Low-Dimensional Systems and Nanostructures},
  title        = {Nano-scale Schottky contacts: ultrafast drift-diffusion dynamics studied in the optical near field},
  url          = {http://dx.doi.org/10.1016/S1386-9477(02)00209-6},
  volume       = {13},
  year         = {2002},
}