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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
; ; and
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
2016-04-01 15:44:42
date last changed
2022-02-27 08:30:06
@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}},
  keywords     = {{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}},
  doi          = {{10.1016/S1386-9477(02)00209-6}},
  volume       = {{13}},
  year         = {{2002}},
}