Third-order optical nonlinearities of spray deposited l -glutamic acid thin films using Z-scan and f-scan
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Third-order optical nonlinearities of spray deposited L-glutamic acid thin films using Z-scan and f-scan K. Dinesh Babu1, P. Philominathan2,* 1 2
, and K. Murali1
Department of Physics, Anna University, Chennai, Tamil Nadu, India PG and Research Department of Physics, AVVM Sri Pushpam College, Poondi, Thanjavur, Tamil Nadu 613 503, India
Received: 26 May 2020
ABSTRACT
Accepted: 19 August 2020
The L-glutamic acid thin films prepared using a lucrative process simplified spray pyrolysis (or) perfume atomizer technique. The absorption coefficient, refractive index, extinction coefficient, imaginary and real parts of dielectric constant, electrical and optical conductivity, optical polarization, electrical and optical susceptibility were inspected with spectrum of UV–Visible spectroscopy. The optical properties for varying molar concentration and wavelength were investigated to reveal the characteristic features of the chosen sample. In addition, the nonlinear optical constants, third-order susceptibility, nonlinear refractive index, nonlinear absorption coefficient, intensity dependent refractive coefficient and change in refractive index were also examined with Z-scan technique. The optical nonlinearities were also assayed using the Eclipse and f-scan experiments. The difference in the nonlinear optical responses relating to selected functional parameters has been considered significantly along with optical limiting behavior.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction In the applications of modern technological devices such as optoelectronics, optical displays and memory cards, the organic nonlinear optical thin films play a key role [1–5]. In recent times, the nonlinear optical materials of amino acids have placid applicability in photonics, optoelectronic devices, optical computing, optical communications, information processing and optical data storage [6–11]. Indeed, L-glutamic acid, Lhistidine, L-valine, L-arginine, L-alanine, L-tartaric acid, L-Methionine L-Methioninium doped crystals have been proposed as a new approach for materials
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https://doi.org/10.1007/s10854-020-04291-w
with attracting enhanced nonlinear optical properties [9–16]. The title compound L-glutamic acid has been observed for its reported enhanced nonlinear optical properties [14–16], such that the compound was considered for the understanding of its nonlinear optical properties as thin film and to propose it as a potential candidate for the nonlinear optical applications. Thin film deposition can be done by using several techniques like thermal evaporation, pulsed laser deposition, sol–gel technique, molecular beam epitaxy (MBE), metal organic chemical vapor deposition (MOCVD) and spray pyrolysis technique [17–22].
J Mater Sci: Mater Electron
Among them, the simplified spray pyrolysis technique was followed for the preparation of thin films [23, 24], in which the solution reservoir, compacted air container with the spray gun assem
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