Advanced

Carrier dynamics around nano-scale Schottky contacts: a femtosecond near-field study

Achermann, M; Siegner, U; Wernersson, Lars-Erik LU and Keller, U (2002) In Applied Surface Science 190(1-4). p.513-516
Abstract
We report spatially and time-resolved measurements of ultrafast carrier dynamics around buried nano-scale Schottky contacts, performed with a novel femtosecond near-field scanning optical microscope. 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. We show that the built-in field suppresses electron transport towards and trapping into the metal particles at lower optically excited carrier densities. In contrast, efficient electron trapping into the metal occurs at higher electron densities, which screen the built-in field, allowing for efficient transport of electrons towards the Schottky contact. (C) 2002 Elsevier... (More)
We report spatially and time-resolved measurements of ultrafast carrier dynamics around buried nano-scale Schottky contacts, performed with a novel femtosecond near-field scanning optical microscope. 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. We show that the built-in field suppresses electron transport towards and trapping into the metal particles at lower optically excited carrier densities. In contrast, efficient electron trapping into the metal occurs at higher electron densities, which screen the built-in field, allowing for efficient transport of electrons towards the Schottky contact. (C) 2002 Elsevier Science B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Schottky nano-contacts, near-field optics, ultrafast carrier transport
in
Applied Surface Science
volume
190
issue
1-4
pages
513 - 516
publisher
Elsevier
external identifiers
  • wos:000176520700094
  • scopus:0037041994
ISSN
1873-5584
DOI
10.1016/S0169-4332(01)00928-X
language
English
LU publication?
yes
id
54c45634-6533-430f-a663-7d3e32aa076e (old id 334635)
date added to LUP
2007-08-03 11:03:16
date last changed
2017-01-01 04:43:39
@article{54c45634-6533-430f-a663-7d3e32aa076e,
  abstract     = {We report spatially and time-resolved measurements of ultrafast carrier dynamics around buried nano-scale Schottky contacts, performed with a novel femtosecond near-field scanning optical microscope. 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. We show that the built-in field suppresses electron transport towards and trapping into the metal particles at lower optically excited carrier densities. In contrast, efficient electron trapping into the metal occurs at higher electron densities, which screen the built-in field, allowing for efficient transport of electrons towards the Schottky contact. (C) 2002 Elsevier Science B.V. All rights reserved.},
  author       = {Achermann, M and Siegner, U and Wernersson, Lars-Erik and Keller, U},
  issn         = {1873-5584},
  keyword      = {Schottky nano-contacts,near-field optics,ultrafast carrier transport},
  language     = {eng},
  number       = {1-4},
  pages        = {513--516},
  publisher    = {Elsevier},
  series       = {Applied Surface Science},
  title        = {Carrier dynamics around nano-scale Schottky contacts: a femtosecond near-field study},
  url          = {http://dx.doi.org/10.1016/S0169-4332(01)00928-X},
  volume       = {190},
  year         = {2002},
}