Wu Feng et al 2008 Chinese Phys. Lett. 25 1461 doi:10.1088/0256-307X/25/4/080
Wu Feng1,2, Tian Wei1, Ma Li-Na1, Chen Wen-Ju1, Zhang Gui-Lan1, Zhao Guo-Feng3, Cao Shi-Dong3 and Xie Wei3
Show affiliationsThe optical nonlinear properties of CdSeS/ZnS quantum dots (QDs) are investigated by Z-scan technique using fundamental harmonic generation (1064 nm) of mode-locked Nd:YAG laser for the first time. The experimental results show that two photon absorptions (TPA) occur at input intensity up to 12.5 GW/cm2. CdSeS/ZnS QDs have an average TPA cross section of 13710 GM and large nonlinear refractive index on order of 10-7 esu. The large optical nonlinearities perhaps allow the CdSeS/ZnS QDs to be one kind of candidate material for bioimaging and fluorescence label, optical limiting and all-optical switching.
Issue 4 (April 2008)
Received 19 December 2007
Wu Feng et al 2008 Chinese Phys. Lett. 25 1461
A Godeke 2006 Supercond. Sci. Technol. 19 R68
Tudor Jenkins 2005 Phys. Educ. 40 430
Ikuko Hojo et al 2009 J. Phys.: Conf. Ser. 190 012017
Christian Brosseau 2006 J. Phys. D: Appl. Phys. 39 1277
Wen-bin Fan et al 2005 Nanotechnology 16 1526
J P Andretzko et al 2008 Physiol. Meas. 29 1121
Johan J M Pel and Ron van Mastrigt 2007 Physiol. Meas. 28 13
W Que et al 2004 Phys. Med. Biol. 49 399
Xu Zheng-Wen et al 2003 Chinese Phys. Lett. 20 370