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

Lingyun Pan, Atsushi Ishikawa, Naoto Tamai
2007 Physical Review B  

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Nanometer-sized CdTe quantum dots ͑QDs͒ in D 2 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 ͑TPA͒ cross section of 10 4 -10 5 GM for CdTe QDs makes it possible to detect the trapping process with TPA induced luminescence. In D 2 O, the luminescence intensity of CdTe QDs was found to increase with time, whereas an intensity decrease was clearly detected in H 2 O. In addition, the optically trapped
more » ... CdTe QDs were fixed on a hydrophilic glass substrate. Laser trapping of QDs may provide a basic technique for quantum information and biological applications.
doi:10.1103/physrevb.75.161305 fatcat:6fliwsllgzhnlixvee3m3nwvf4
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Lingyun Pan, Atsushi Ishikawa, Naoto Tamai. "Detection of optical trapping of CdTe quantum dots by two-photon-induced luminescence." Physical Review B 75.16 (2007)