Type

Journal Article

Authors

John Hegarty
John Francis Donegan

Subjects

Physics

Topics
higher enhancement electron physics optical quantum wells plasma gain

Effect of Coulomb enhancement on optical gain in (Zn,Cd)Se/ZnSe multiple quantum wells (1997)

Abstract The optical-gain spectra of a 40-? (Zn,Cd)Se/ZnSe multiple quantum well has been measured at various temperatures using a variable-stripe method. By comparison with a gain calculation including many-body effects, we have shown that gain in this structure arises from an electron-hole plasma (EHP) for temperatures higher than 140 K. Excellent agreement between experiment and theory allows us to demonstrate the significance of many-body effects such as carrier dephasing and Coulomb enhancement. The breakdown of the EHP model below 140 K indicates an increasing excitonic contribution.
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Full list of authors on original publication

John Hegarty, John Francis Donegan

Experts in our system

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John Francis Donegan
Trinity College Dublin
Total Publications: 156