Third-order nonlinear optical properties of hybrid films of biopolymer-CdSe/ZnS core-shell quantum dots | Zendy

Ding Sha | Zendy; Xiaohui Wang | Zendy; Yumin Du | Zendy; QuQuan Wang | Zendy

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Third-order nonlinear optical properties of hybrid films of biopolymer-CdSe/ZnS core-shell quantum dots

Author(s) -

Ding Sha,

Xiaohui Wang,

Yumin Du,

QuQuan Wang

Publication year - 2006

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.55.753

Subject(s) - quantum dot , femtosecond , materials science , biopolymer , laser , absorbance , photoluminescence , optoelectronics , photonics , nonlinear optics , core (optical fiber) , optics , nanotechnology , polymer , physics , composite material

Biopolymer_CdSe/ZnS core_shell quantum dot hybrid films were prepared using self_assembly technique. Compared with the absorbance spectrum, the photoluminescence excited by laser with λ=395nm has Stokes shift. The third_order nonlinear optical properties of biopolymer_CdSe/ZnS film were studied by Z_scan setup with femtosecond laser at 790nm. It is found that the nonlinear absorptive signal partially originates from Cde/ZnS quantum dots while the nonlinear refractive signal partially originates from biopolymer chitosan. The magnitudes of them are measured to be β6.5×10-6cm/W and n21.5×10-10cm2/W, respectively.

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