Quantum confined Stark effect in quantum wires: Wave function splitting and cascading

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 k.p 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.


Published in:
Europhysics Letters, 44, 6, 759-765
Year:
1998
ISSN:
0295-5075
Keywords:
Note:
Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, Inst Micro & Optoelect, PHB Ecublens,Dept Phys, CH-1015 Lausanne, Switzerland. Dupertuis, MA, Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, Inst Micro & Optoelect, PHB Ecublens,Dept Phys, CH-1015 Lausanne, Switzerland.
ISI Document Delivery No.: 149BP
Times Cited: 5
Cited Reference Count: 17
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