Direct observation of mixed-parity excited states in surface-passivated PbS nanocrystals

被引：8
|
作者：
Fernée, MJ [1 ]
Watt, A
Warner, J
Heckenberg, N
Rubinsztein-Dunlop, H
机构：
[1] Univ Queensland, Ctr Quantum Comp Technol, Dept Phys, Brisbane, Qld 4072, Australia
[2] Univ Queensland, Ctr Biophoton & Laser Sci, Dept Phys, Brisbane, Qld 4072, Australia
来源：
NANOTECHNOLOGY | 2004年 / 15卷 / 09期
关键词：
D O I：
10.1088/0957-4484/15/9/040
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Photoluminescent emission is observed from surface-passivated PbS nanocrystals following the two-photon excitation of high-energy excitonic states. The emission appears directly at the excitation energy with no detectable Stokes-shift for a wide range of excitation energies. The observation of direct emission from states excited by two-photon absorption indicates that the parity of the excited states of surface-passivated PbS nanocrystals is partially mixed.
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页码：1351 / 1355
页数：5
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