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Interband optical-absorption spectra of a finite quantum dot superlattice in a cylindrical nanowire
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10.1063/1.2131190
/content/aip/journal/jap/98/9/10.1063/1.2131190
http://aip.metastore.ingenta.com/content/aip/journal/jap/98/9/10.1063/1.2131190
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Figures

Image of FIG. 1.
FIG. 1.

Schematic representation of the QDSLW geometry and the corresponding potential profiles of electrons and holes. A superlattice of 20 quantum dots (InP barriers) embedded in the central part of a 300-nm-long rod of InP nanowire.

Image of FIG. 2.
FIG. 2.

Comparison of the exciton-dominated optical-absorption spectrum and joint density of states in an ideal 1D QDSLW and in a plain 1D QW.

Image of FIG. 3.
FIG. 3.

Size dependence of the exciton dominant optical-absorption spectra in the QDSLW. The radius of the cylindrical QDSLW is , 3.6, and 4.5 nm, respectively.

Image of FIG. 4.
FIG. 4.

Optical absorption in the QDSLW in the presence of a dc field along the wire with different field strengths. With the field strength increasing, the main exciton peak shift to the lower-energy side and its magnitude decreases and the minor peak next to the main exciton peak increases and redshifts.

Image of FIG. 5.
FIG. 5.

Optical absorption in the QDSLW in the presence of a terahertz field along the wire. (a) Different frequencies , 11, and 20 meV, with field strength fixed at ; (b) Different field strengths , 30, 50, and , with frequency fixed at . Autler-Townes splitting of the exciton peak and one-photon and two-photon gain spectra at different field strengths.

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/content/aip/journal/jap/98/9/10.1063/1.2131190
2005-11-14
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Interband optical-absorption spectra of a finite quantum dot superlattice in a cylindrical nanowire
http://aip.metastore.ingenta.com/content/aip/journal/jap/98/9/10.1063/1.2131190
10.1063/1.2131190
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