Carrier dynamics around nano-scale Schottky contacts: a femtosecond near-field study
(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:
https://lup.lub.lu.se/record/334635
- author
- Achermann, M ; Siegner, U ; Wernersson, Lars-Erik LU and Keller, U
- organization
- publishing date
- 2002
- 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
- 2016-04-01 11:59:04
- date last changed
- 2022-02-11 00:20:35
@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}},
keywords = {{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}},
doi = {{10.1016/S0169-4332(01)00928-X}},
volume = {{190}},
year = {{2002}},
}