Second and third harmonic nonlinear optical process in spray pyrolysed Mg:ZnO thin films

Krithika Upadhya; U. G. Deekshitha; Albin Antony; Aninamol Ani; I. V. Kityk; J. Jedryka; A. Wojciechowski; K. Ozga; P. Poornesh; Suresh D. Kulkarni; N. Andrushchak

doi:10.1016/j.optmat.2020.109814

Second and third harmonic nonlinear optical process in spray pyrolysed Mg:ZnO thin films

Krithika Upadhya, U. G. Deekshitha, Albin Antony, Aninamol Ani, I. V. Kityk, J. Jedryka, A. Wojciechowski, K. Ozga, P. Poornesh, Suresh D. Kulkarni, N. Andrushchak

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

In the present study, Mg-doped ZnO (MZO) nanofilms (NF) were grown by spray pyrolysis technique. X-ray diffraction (XRD) patterns have shown an intense peak oriented along (002) crystalline plane confirming crystalline origin of grown MZO films. Atomic force microscopy (AFM) data revealed that the average roughness decreased significantly upon Mg doping from 20.3 nm to 4.72 nm. Ambient temperature photoluminescence spectra accounted for four emission bands in the visible spectral region due to the presence of various intrinsic defect centres in the films. The non-linear absorption coefficient (β_eff) were estimated by open aperture Z-scan technique and found to be in the order of 10⁻² (cm/W) and indicates a positive absorption nonlinearity. Additionally, it was observed that incorporation of the metal Mg ions leads to a decay of the second harmonic generation (SHG) and to a non-regular increase of the third harmonic generation (THG).

Original language	English
Article number	109814
Journal	Optical Materials
Volume	102
DOIs	https://doi.org/10.1016/j.optmat.2020.109814
Publication status	Published - 04-2020

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Computer Science(all)
Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Electrical and Electronic Engineering

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title = "Second and third harmonic nonlinear optical process in spray pyrolysed Mg:ZnO thin films",

abstract = "In the present study, Mg-doped ZnO (MZO) nanofilms (NF) were grown by spray pyrolysis technique. X-ray diffraction (XRD) patterns have shown an intense peak oriented along (002) crystalline plane confirming crystalline origin of grown MZO films. Atomic force microscopy (AFM) data revealed that the average roughness decreased significantly upon Mg doping from 20.3 nm to 4.72 nm. Ambient temperature photoluminescence spectra accounted for four emission bands in the visible spectral region due to the presence of various intrinsic defect centres in the films. The non-linear absorption coefficient (βeff) were estimated by open aperture Z-scan technique and found to be in the order of 10−2 (cm/W) and indicates a positive absorption nonlinearity. Additionally, it was observed that incorporation of the metal Mg ions leads to a decay of the second harmonic generation (SHG) and to a non-regular increase of the third harmonic generation (THG).",

author = "Krithika Upadhya and Deekshitha, {U. G.} and Albin Antony and Aninamol Ani and Kityk, {I. V.} and J. Jedryka and A. Wojciechowski and K. Ozga and P. Poornesh and Kulkarni, {Suresh D.} and N. Andrushchak",

year = "2020",

month = apr,

doi = "10.1016/j.optmat.2020.109814",

language = "English",

volume = "102",

journal = "Optical Materials",

issn = "0925-3467",

publisher = "Elsevier",

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TY - JOUR

T1 - Second and third harmonic nonlinear optical process in spray pyrolysed Mg:ZnO thin films

AU - Upadhya, Krithika

AU - Deekshitha, U. G.

AU - Antony, Albin

AU - Ani, Aninamol

AU - Kityk, I. V.

AU - Jedryka, J.

AU - Wojciechowski, A.

AU - Ozga, K.

AU - Poornesh, P.

AU - Kulkarni, Suresh D.

AU - Andrushchak, N.

PY - 2020/4

Y1 - 2020/4

N2 - In the present study, Mg-doped ZnO (MZO) nanofilms (NF) were grown by spray pyrolysis technique. X-ray diffraction (XRD) patterns have shown an intense peak oriented along (002) crystalline plane confirming crystalline origin of grown MZO films. Atomic force microscopy (AFM) data revealed that the average roughness decreased significantly upon Mg doping from 20.3 nm to 4.72 nm. Ambient temperature photoluminescence spectra accounted for four emission bands in the visible spectral region due to the presence of various intrinsic defect centres in the films. The non-linear absorption coefficient (βeff) were estimated by open aperture Z-scan technique and found to be in the order of 10−2 (cm/W) and indicates a positive absorption nonlinearity. Additionally, it was observed that incorporation of the metal Mg ions leads to a decay of the second harmonic generation (SHG) and to a non-regular increase of the third harmonic generation (THG).

AB - In the present study, Mg-doped ZnO (MZO) nanofilms (NF) were grown by spray pyrolysis technique. X-ray diffraction (XRD) patterns have shown an intense peak oriented along (002) crystalline plane confirming crystalline origin of grown MZO films. Atomic force microscopy (AFM) data revealed that the average roughness decreased significantly upon Mg doping from 20.3 nm to 4.72 nm. Ambient temperature photoluminescence spectra accounted for four emission bands in the visible spectral region due to the presence of various intrinsic defect centres in the films. The non-linear absorption coefficient (βeff) were estimated by open aperture Z-scan technique and found to be in the order of 10−2 (cm/W) and indicates a positive absorption nonlinearity. Additionally, it was observed that incorporation of the metal Mg ions leads to a decay of the second harmonic generation (SHG) and to a non-regular increase of the third harmonic generation (THG).

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DO - 10.1016/j.optmat.2020.109814

M3 - Article

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SN - 0925-3467

VL - 102

JO - Optical Materials

JF - Optical Materials

M1 - 109814

ER -

Second and third harmonic nonlinear optical process in spray pyrolysed Mg:ZnO thin films

Abstract

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