**Author details**

Krishtappa Manjunatha<sup>1</sup> , Veerabhadrappa Jagadeesha Angadi<sup>2</sup> \*, Brian Jeevan Fernandes<sup>3</sup> and Keralapura Parthasarathy Ramesh<sup>3</sup>

1 Department of Physics, School of Engineering, Presidency University, Bangalore, India

2 Department of Physics, P.C. Jabin Science College, Hubballi, India

3 Department of Physics, Indian Institution of Science (IISc), Bangalore, India

\*Address all correspondence to: jagadeeshbub@gmail.com

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