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.

引用

页码：1351 / 1355

页数：5

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