Department of Electronics and Communication Engineering,Tezpur University,Tezpur 784028,Assam,India;
Department of Electronics and Telecommunication Engineering,Bengal Engineering and Science University,Howrah 711103,India;
Nanoscience and Soft Matter Physics Laboratory,Department of Physics,Tezpur University,Tezpur 784028,Assam,India;
Center of Excellence for Green Energy and Sensors Systems,Bengal Engineering and Science University,Howrah 711103,West Bengal,India;