New approach to blue-shifting asymmetric quantum wells

Craig Cooper; Peter Blood; Catherine H. Molloy; Xiaoyuan Chen; David I. Westwood; Peter M. Smowton; David Somerford

doi:10.1117/12.273787

2 May 1997 New approach to blue-shifting asymmetric quantum wells

Craig Cooper, Peter Blood, Catherine H. Molloy, Xiaoyuan Chen, David I. Westwood, Peter M. Smowton, David Somerford

Proceedings Volume 3001, In-Plane Semiconductor Lasers: from Ultraviolet to Midinfrared; (1997) https://doi.org/10.1117/12.273787
Event: Photonics West '97, 1997, San Jose, CA, United States

Abstract

Asymmetric quantum wells which exhibit a blue-shift in their transition energy with increasing optical pump intensity are of interest for use in a variety of optoelectronic devices. The blue-shift is usually achieved by the piezoelectric effect in quantum wells which are grown to be mismatched with respect to a substrate cut on a polar orientation, usually (111) GaAs. The internal piezoelectric field produces a triangular-shaped well which flattens-out as carriers are injected and screen the field. We have overcome a number of difficulties in this approach by generating the internal field in structures grown on (100) substrates by introducing delta-doping layers of opposite type at the well-barrier interface at each side of the well. In this paper we present details of the electro-optical properties of both kinds of structure and we show that the delta-doped structures exhibit similar blue-shifts to their (111) counterparts. We show that both structures produce laser action under injection from a p-n junction.

Citation Download Citation

Craig Cooper, Peter Blood, Catherine H. Molloy, Xiaoyuan Chen, David I. Westwood, Peter M. Smowton, and David Somerford "New approach to blue-shifting asymmetric quantum wells", Proc. SPIE 3001, In-Plane Semiconductor Lasers: from Ultraviolet to Midinfrared, (2 May 1997); https://doi.org/10.1117/12.273787

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