No Cover Image

Conference Paper/Proceeding/Abstract 384 views

Characterisation of the influence of multi-quantum barrier reflectors within GaInP/AlGaInP quantum well lasers using near-field imaging techniques

Richard Cobley Orcid Logo

Applied Surface Science, Volume: 255, Issue: 3, Pages: 649 - 652

Swansea University Author: Richard Cobley Orcid Logo

Full text not available from this repository: check for access using links below.

DOI (Published version): 10.1016/j.apsusc.2008.07.062

Abstract

<p>Using a near-field scanning optical microscope, near-field photocurrent and topographic imaging has measured the effect on intrinsic electric fields and photocurrent propagation resulting from inserting multi-quantum barrier (MQB) super-lattices into quantum well lasers. Measurements on dev...

Full description

Published in: Applied Surface Science
Published: 2008
URI: https://cronfa.swan.ac.uk/Record/cronfa5731
Tags: Add Tag
No Tags, Be the first to tag this record!
Abstract: <p>Using a near-field scanning optical microscope, near-field photocurrent and topographic imaging has measured the effect on intrinsic electric fields and photocurrent propagation resulting from inserting multi-quantum barrier (MQB) super-lattices into quantum well lasers. Measurements on devices at two different excitation wavelengths have highlighted the sensitivity of the near-field optical technique. Strong correlations were seen in the photocurrent response of the multi-quantum barrier regions when compared with simulations made on the electric field generated within the structure. As a result, photocurrent attenuation was attributed to carrier confinement in these barrier regions when compared to a control sample. The measurements illustrate the effectiveness of the MQB, in addition to the sensitivity and power of the near-field photocurrent technique.</p>
College: College of Engineering
Issue: 3
Start Page: 649
End Page: 652