Detection of optical trapping of CdTe quantum dots by two-photon-induced luminescence

被引：65

作者：

Pan, Lingyun ^{[1
]}

Ishikawa, Atsushi ^{[1
]}

Tamai, Naoto ^{[1
]}

机构：

[1] Kwansei Gakuin Univ, Sch Sci & Technol, Dept Chem, Sanda 6691337, Jamaica

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.75.161305

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanometer-sized CdTe quantum dots (QDs) in D2O can be optically trapped by a high repetition-rate picosecond Nd:YLF laser with an input power as low as 100 mW. A large two-photon absorption (TPA) cross section of 10(4)-10(5) GM for CdTe QDs makes it possible to detect the trapping process with TPA induced luminescence. In D2O, the luminescence intensity of CdTe QDs was found to increase with time, whereas an intensity decrease was clearly detected in H2O. In addition, the optically trapped CdTe QDs were fixed on a hydrophilic glass substrate. Laser trapping of QDs may provide a basic technique for quantum information and biological applications.

引用

页数：4

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