Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots

Wang, Y.1; Yang, X.2; He, T. C.1; Gao, Y.1; Demir, H. V.1,2,3,4; Sun, X. W.2,5; Sun, H. D.1,6

2013-01-14

10.1063/1.4776702

APPLIED PHYSICS LETTERS   影响因子和分区

0003-6951

We have investigated the third-order optical nonlinearities of high-quality colloidal InP/ZnS core-shell quantum dots (QDs) using Z-scan technique with femtosecond pulses. The two-photon absorption cross-sections as high as 6.2 x 10(3) GM are observed at 800 nm (non-resonant regime) in InP/ZnS QDs with diameter of 2.8 nm, which is even larger than those of CdSe, CdS, and CdTe QDs at similar sizes. Furthermore, both of the 2.2 nm and 2.8 nm-sized InP/ZnS QDs exhibit strong saturable absorption in near resonant regime, which is attributed to large exciton Bohr radius in this material. These results strongly suggest the promising potential of InP/ZnS QDs for widespread applications, especially in two-photon excited bio-imaging and saturable absorbing. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4776702]

SCI ; EI

英语

NI期刊

其他

Singapore Agency for Science, Technology and Research (A*STAR)[092 101 0057] ; Singapore Agency for Science, Technology and Research (A*STAR)[092 151 0088]

Physics

Physics, Applied

WOS:000313670200036

AMER INST PHYSICS

20130515950493

Cadmium sulfide ; Cadmium telluride ; Colloids ; Electromagnetic pulse ; II-VI semiconductors ; III-V semiconductors ; Indium phosphide ; Nanocrystals ; Nonlinear optics ; Photons ; Selenium compounds ; Semiconducting indium phosphide ; Two photon processes

Electricity and Magnetism:701 ; Compound Semiconducting Materials:712.1.2 ; Semiconductor Devices and Integrated Circuits:714.2 ; Nonlinear Optics:741.1.1 ; Nanotechnology:761 ; Colloid Chemistry:801.3 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Atomic and Molecular Physics:931.3

PHYSICS

Web of Science

1.Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore
2.Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore
3.Bilkent Univ, Dept Phys, UNAM Natl Nanotechnol Res Ctr, TR-06800 Ankara, Turkey
4.Bilkent Univ, Dept Elect & Elect Engn, UNAM Natl Nanotechnol Res Ctr, TR-06800 Ankara, Turkey
5.S Univ Sci & Technol, Shenzhen 518055, Peoples R China
6.Nanyang Technol Univ, CDPT, Singapore 639798, Singapore

Wang, Y.,Yang, X.,He, T. C.,et al. Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots[J]. APPLIED PHYSICS LETTERS,2013,102(2).

Wang, Y..,Yang, X..,He, T. C..,Gao, Y..,Demir, H. V..,...&Sun, H. D..(2013).Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots.APPLIED PHYSICS LETTERS,102(2).

Wang, Y.,et al."Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots".APPLIED PHYSICS LETTERS 102.2(2013).