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

Lingyun Pan; Atsushi Ishikawa; Naoto Tamai

doi:10.1103/PhysRevB.75.161305

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

Lingyun Pan, Atsushi Ishikawa, Naoto Tamai

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Abstract

Nanometer-sized CdTe quantum dots (QDs) in D2 O 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 104 - 105 GM for CdTe QDs makes it possible to detect the trapping process with TPA induced luminescence. In D2 O, the luminescence intensity of CdTe QDs was found to increase with time, whereas an intensity decrease was clearly detected in H2 O. 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.

Original language	English
Article number	161305
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	75
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevB.75.161305
Publication status	Published - 2007 Apr 30
Externally published	Yes

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ASJC Scopus subject areas

Condensed Matter Physics

Cite this

Pan, L., Ishikawa, A., & Tamai, N. (2007). Detection of optical trapping of CdTe quantum dots by two-photon-induced luminescence. Physical Review B - Condensed Matter and Materials Physics, 75(16), [161305]. https://doi.org/10.1103/PhysRevB.75.161305

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10.1103/PhysRevB.75.161305