Volume 44, Number 6, December II 1998
|Page(s)||759 - 765|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Quantum confined Stark effect in quantum wires: Wave function splitting and cascading
Institute for Micro- and Opto-electronics, Department of Physics, Swiss Federal Intitute of Technology-EPFL, PHB-Ecublens - CH-1015 Lausanne, Switzerland
Accepted: 26 October 1998
We show that the two-dimensional quantum confined Stark effect in a semiconductor quantum wire can display novel behaviour, i.e. wave function splitting and cascading. No analog to these phenomena can be found in bulk material or quantum wells. The consequences of these effects on Stark shifts, oscillator strengths and electroabsorption spectra are explored numerically using theory. A non-trivial prediction of our model is that, for the case of hole wave function splitting, the cascading of the ladder of states gives rise to observable duplications of the lowest peaks in the interband absorption spectra.
PACS: 73.20.Dx – Electron states in low-dimensional structures (superlattices, quantum well structures and multilayers) / 78.66.Fd – III V semiconductors / 71.70.Ej – Spin orbit coupling, Zeeman and Stark splitting
© EDP Sciences, 1998
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