Effect of heavy metals (Ni, Cu, Pb) doped ZnO on the nonlinear optical properties

In this paper, the non-linear optical properties of undoped and doped ZnO thin films were investigated. The films were doped with Ni, Pb, and Cu. an increase in the refractive index against wavelength is apparent for all films up to a certain value of wavelength. Z scan technique is used for measuri...

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Bibliographic Details
Published in:Materials research express 2020-11, Vol.7 (11), p.116202
Main Authors: Salah, Abeer, Aboud, Ahmed A, Saad, A M
Format: Article
Language:English
Subjects:
Absorptivity
Copper
doped ZnO
Doping
Heavy metals
Lead
Mathematical analysis
Nickel
nonlinear absorption
Nonlinear optics
nonlinear refraction
Nonlinearity
Optical limiters
optical limiting
Optical properties
Optoelectronic devices
Refractivity
Thin films
Z scan
Zinc oxide
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Summary:In this paper, the non-linear optical properties of undoped and doped ZnO thin films were investigated. The films were doped with Ni, Pb, and Cu. an increase in the refractive index against wavelength is apparent for all films up to a certain value of wavelength. Z scan technique is used for measuring the nonlinear optical parameters via open and closed aperture configurations. Third order nonlinear susceptibilities (χ(3)) of samples were calculated. The sign of nonlinear refractive index (n2) of ZnO was changed from positive (self-focus) to negative (de-focus) upon metal doping. Doping ZnO with heavy metals changes the sign of nonlinearity although the nonlinear absorption coefficient (β) is positive for all samples; the doped materials behave as optical limiters at high intensity. These materials are promising for optoelectronic devices and optical limiting applications.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/abc845