Asian Journal of Physics Vol 31, Nos 9 – 10 (2022) 897-904

Exploring the effects of intermolecular interactions on the self-defocusing of binary liquid mixtures using single beam z-scan technique

Rahul Kumar Gupta, Surya Kant and Debabrata Goswami
Department of Chemistry
Indian Institute of Technology Kanpur, Kanpur-208 016, India

Self-defocusing (or negative lens effect) study of different sets of binary liquid mixtures having varying polarities has been carried out by employing a high repetition rate (HRR) femtosecond pulsed laser and utilising a single beam close aperture z-scan (CAZS) technique. We determined the change in transmittance values between peak and valley (ΔTp-v) of the CAZS trace for each different binary liquid mixtures at the varying composition of components. We correlated the variation of ΔTp-v values with the composition ratio of components to the change in physical parameters, which in turn affects the intermolecular interactions. Here, the combined effects of polarity differences and different molecular structures having steric hindrance are found to affect intermolecular interactions significantly in binary mixtures which in turn affect the self-defocusing effect. © Anita Publications. All rights reserved.
Keywords: Close aperture z-scan (CAZS), High repetition rate (HRR) femtosecond pulses, Binary liquid mixtures, Intermolecular interactions, Polarity, Steric hindrance.

Peer Review Information
Method: Single- anonymous; Screened for Plagiarism? Yes
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