Role of the shell thickness in stimulated emission and photoinduced absorption in CdSe core/shell nanorods

被引：38

作者：

Cretí, A

Zavelani-Rossi, M

Lanzani, G

Anni, M

Manna, L

Lomascolo, M

机构：

[1] Politecn Milan, INFM, CNR, Natl Lab Ultrafast & Ultraintense Opt Sci,ULTRAS,, I-20133 Milan, Italy

[2] Univ Lecce, INFM, NNL, Natl Nanotechnol Lab, I-73100 Lecce, Italy

[3] Univ Lecce, Dipartimento Ingn Innovaz, I-73100 Lecce, Italy

[4] CNR, IMM, Ist Microelettron & Microsist, I-73100 Lecce, Italy

[5] Univ Lecce, ISUFI, Inst Adv Interdisciplinary Studies, I-73100 Lecce, Italy

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.73.165410

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of the shell thickness on stimulated emission and photoinduced absorption transitions in CdSe quantum rods is investigated by femtosecond pump and probe spectroscopy. The role of surface/interface defect states, which result resonant to the high energy states and to the midgap, respectively, is pointed out. We find that the density of such states depend on the shell thickness and that the interface defects can be negligible for thin shells. As a result in the latter case stimulated emission can be observed for longer times.

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页数：4

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