Studies on NiO-PVA Composite Films for Opto-Electronics and Optical Limiters

We report optical, excited-state lifetime, and nonlinear optical (NLO) properties of nickel oxide (NiO)/poly vinylalcohol (PVA) polymer free-standing films for opto-electronics and optical limiting applications. Optical absorption studies of NiO-loaded PVA films show that the exciton peaks are cente...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 30; no. 17; pp. 1539 - 1542
Main Authors Karthikeyan, B., Hariharan, S., Mangalaraja, R. V., Pandiyarajan, T., Udayabhaskar, R., Sreekanth, P.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.09.2018
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Absorption
Constraining
Decay rate
effective two photon absorption
Electronics
Emission analysis
Excitons
excitons in NiO
Fluorescence
Neodymium lasers
Nickel oxides
Nonlinear optics
Optical films
Optical imaging
Optical limiters
Optical polymers
Optical power limiting
Optical properties
Optical sensors
Photon absorption
Polymer films
polymer nanocomposite
Semiconductor lasers
YAG lasers
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Summary:We report optical, excited-state lifetime, and nonlinear optical (NLO) properties of nickel oxide (NiO)/poly vinylalcohol (PVA) polymer free-standing films for opto-electronics and optical limiting applications. Optical absorption studies of NiO-loaded PVA films show that the exciton peaks are centered at 330 nm. Fluorescence studies reveal that the emission is due to exciton recombination and defects in NiO. Time-resolved fluorescence studies show that the recombination in PVA happens through NiO, where NiO has a faster decay time than the pure PVA. NLO measurements carried out using a 532 nm, 10-ns Nd: YAG laser, show that for a given energy, NiO/PVA shows good optical limiting, and the obtained NLO behavior is due to effective two-photon absorption.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2018.2859042