Tunable femtosecond nonlinear absorption and optical limiting thresholds of La2O3-B2O3 glasses by controlling the borate structural units


Utilization of optical limiting materials to suppress the input intense laser energy is obligatory in a wide variety of applications that deploy the high-power laser sources. In this letter, we demonstrate that the optimization of borate structural units in lanthanum borate (LB) glasses through the addition of various concentrations of heavy metal oxides (HMOs) (PbO and Bi2O3) resulting in achievement of an optimum optical threshold value. The structural changes of these glasses were analyzed by B-11 MAS-NMR and Raman spectroscopic techniques. Nonlinear optical attributes were assessed by the Z-scan technique. The enhancement of two-photon absorption coefficient and decrement in optical limiting threshold factors suggest the LB glasses containing HMOs could be beneficial for power optical limiting devices. The achieved optical limiting threshold values of 0.075 and 0.114 J/cm(2) at 700 and 800 nm, respectively, are superior compared to advanced materials such as nanoparticles, carbon nanotubes, and few-layers of MoS2/Polymethylmethacrylates. (c) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.




Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering


Jagannath, G; Gaddam, A; Rao, SV; Agarkov, DA; Korableva, GM; Ghosh, M; Dey, KK; Ferreira, JMF; Allu, AR

nossos autores


The authors (G.J) and (A.R.A) are thankful Dr. Suman Kumari Mishra, Director, CSIR-CGCRI and Dr. Abhijit Das Sharma, Head, Energy Materials and Devices Division, CSIR-CGCRI for their continuous support and encouragement. G.J would like to express his sincere gratitude to CSIR, New Delhi for providing the financial support in the form of CSIR-RA fellowship under the sanction number 31/015(0158)/2020-EMR-I. The author G.J. would like to thank Dr. B Eraiah, Professor, Department of Physics, Bangalore University, Bengaluru 560056 for providing early stage experimental facilities. S.V. Rao thanks DRDO, India for financial support through ACRHEM. Authors acknowledge the solid-state NMR facility of Sophisticated Instrument Center (SIC) of Dr. Harisingh Gour University, India. NMR spectra were also recorded using the NMR spectrometers which are part of the National NMR Network (PTNMR) and are partially supported by Infrastructure Project No. 022161 (co-financed by FEDER through COMPETE 2020, POCI and PORL and FCT through PIDDAC). This work was developed within the scope of the CICECO-Aveiro Institute of Materials project, FCT Ref. UID/CTM/50011/2019. The authors D.A.A. and G.M.K. would like to thank the Russian Science Foundation grant 17-79-30071 for the financial support of Raman spectroscopy studies. A.G is grateful for the support from the Sao Paulo Research Foundation (FAPESP Processo n degrees 2021/06370-0) and CeRTEV (Center for Research, Technology, and Education in Vitreous Materials-process FAPESP n degrees 2013/07793-6).

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