The University of Southampton
University of Southampton Institutional Repository

Design optimization of optically pumped terahertz lasers in stepped quantum wells

Rutt, H.N., Xin, Z.J. and Tan, H.A. (2002) Design optimization of optically pumped terahertz lasers in stepped quantum wells Journal of Physics D: Applied Physics, 35, (16), pp. 1907-1913. (doi:10.1088/0022-3727/35/16/302).

Record type: Article

Abstract

Asymmetric stepped quantum wells (QWs) have been used in many optoelectronic devices. This paper proposes a modulation doping position at the edge of the stepped well to minimize the potential distortion caused by the doping. As a result, parasitic potential wells are eliminated, and the sensitivity of the energy levels to dopant concentrations is substantially reduced. We also suggest a stacked design to juxtapose two QW slabs in order to improve the waveguide mode overlap in optically pumped terahertz lasers using the structure. The percentage of overlap between the active QWs layers and the laser mode increases from 9.8% for a thinned substrate single slab scheme to 68.4% for the stacked double slabs, respectively, with two highly doped layers acting as plasma waveguide. A diffraction integral model is established to simulate the laser cavity tolerance to possible misalignment in the stacked design. Our modelling result shows that the diffraction loss due to small (few micrometre) misalignment or difference in slab length is negligible compared to other losses in the laser system.


Full text not available from this repository.

More information

Published date: 2002
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 13788
URI: http://eprints.soton.ac.uk/id/eprint/13788
ISSN: 0022-3727
PURE UUID: 9ce78d03-c121-4c8d-873e-97f6019cebe9

Catalogue record

Date deposited: 05 Jan 2005
Last modified: 17 Jul 2017 17:00

Export record

Altmetrics

Contributors

Author: H.N. Rutt
Author: Z.J. Xin
Author: H.A. Tan

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×