Intersubband optical transitions in one dimensional quantum wire structures

A. Sa'ar*, A. Givant, S. Calderon, O. Ben-Shalom, E. Kapon, A. Gustafsson, D. Oberli, C. Caneau

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


One dimensional (1D) quantum wire structures are emerging as the new generation of semiconductor nanostructures offering exciting physical properties which have significant potential for novel device applications. These structures have been the subject of intensive investigation recently including extensive theoretical and experimental studies of their interband optical properties. In this work we present the results of our study of the intersubband optical transitions in 1D semiconductor quantum wires. The crescent shaped quantum wire structures used for this research were grown on non-planar GaAs substrates. The intersubband transition energy spectra, the selection rules, and the two dimensional envelope wavefunctions were theoretically investigated by using our new LENS (local envelope states) expansion. We present recent experimental results on modulation doped V-groove quantum wires, including PL, PLE, TEM, CL, and infrared polarization resolved spectroscopy. We have observed a very unusual absorption lineshape at the far-infrared wavelengths that we assigned to phonon assisted Fano resonance in a modulation doped quantum wire structure.

Original languageAmerican English
Pages (from-to)217-228
Number of pages12
JournalSuperlattices and Microstructures
Issue number3
StatePublished - Apr 1996

Bibliographical note

Funding Information:
Acknowledgements—This work was supported by grant No. 92-00186 from the United States–Israel Binational Science Foundation (BSF), Jerusalem, Israel. One of us (S.C.) acknowledges the Levi– Eshkol Foundation for the support. The work in Lausanne was supported by the Swiss National Science Foundation.


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