Interband optical-absorption spectra of a finite quantum dot superlattice in a cylindrical nanowire
Journal of Applied Physics, ISSN: 0021-8979, Vol: 98, Issue: 9
2005
- 14Citations
- 25Captures
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Article Description
Theoretical calculations of the interband optical-absorption spectra of a finite quantum dot superlattice in a wire (QDSLW) in the presence of a homogeneous dc or terahertz field are presented. The QDSLW has miniband structures of the electron states as general quantum well superlattices do and shows the two features common to one-dimensional structures, viz., strong excitonic absorption below and weak absorption above the band edge. The applied dc field causes a redshift of the location and a decrease in height of the main excitonic peak and leads to an increase in height of the minor peak next to the main peak. In the presence of a terahertz field, the Autler-Townes splitting of the main excitonic peak and the emergence of one-photon and two-photon gain peaks on the spectra are demonstrated. © 2005 American Institute of Physics.
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