**Acknowledgements**

The authors acknowledge Dept. of Science and Technology, Govt. of India for financial support for providing the instrumental facility under DST-FIST in Dept. of ECE, SRM Institute of Science and Technology, Chennai, India.

The authors also acknowledge Visvesvaraya PhD Fellowship of MeitY, Govt. of India and TEQIP-II for procurement of Silvaco TCAD tool in Department of ECE, NIT Silchar for carrying out the research work.
