Resolution of Discrete Excited States in InxGa1-xN Multiple Quantum Wells Using Degenerate Four-Wave Mixing

Kundys, D O, Wells, J P, Andreev, A D, Hashemizadeh, S A, Wang, T, Parbrook, P J, Fox, A M, Mowbray, D J and Skolnick, M S (2006) Resolution of Discrete Excited States in InxGa1-xN Multiple Quantum Wells Using Degenerate Four-Wave Mixing Physical Review B, 73 (16).

Preview

Text fulltext.pdf Download (216kB)

Abstract

We report on two pulse, degenerate four-wave mixing (DFWM) measurements on shallow InxGa1-xN/GaN multiquantum wells (MQWs) grown on sapphire substrates. These reveal pulse length limited signal decays. We have found a 10:1 resonant enhancement of the DFWM signal at the excitonic transition frequencies which thereby give a sharp discrimination of the discrete excitonic contributions within the featureless distribution seen in absorption spectra. The exciton resonances have peak positions, which yield good overall agreement with a full k(.)p model calculation for the quantum well (QW) energy levels and optical transition matrix elements. InxGa1-xN/GaN MQWs generally exhibit strongly inhomogeneously broadened excitation spectra due to indium fluctuation effects; this approach therefore affords a practical method to extract information on the excited excitonic states not available previously.

Item Type:	Article
Divisions :	Faculty of Engineering and Physical Sciences > Physics
Authors :	Name Email ORCID Kundys, D O Wells, J P Andreev, A D a.andreev@surrey.ac.uk Hashemizadeh, S A Wang, T Parbrook, P J Fox, A M Mowbray, D J Skolnick, M S
Date :	1 January 2006
DOI :	10.1103/PhysRevB.73.165309
Related URLs :	Publisher
Additional Information :	Published in Physical Review B, Vol. 73, Iss. 16. Copyright 2006 American Physical Society.
Depositing User :	Mr Adam Field
Date Deposited :	27 May 2010 14:05
Last Modified :	16 Jan 2019 16:17
URI:	http://epubs.surrey.ac.uk/id/eprint/11

Actions (login required)

View Item

Downloads