1. Department of Electrical EngineeringIndian Institute of Technology RoparPunjab140001India
2. Department of Electronics EngineeringNational Chiao Tung UniversityHsinchu30010Taiwan
3. Semi‐Conductor LaboratoryDepartment of SpaceGovernment of IndiaS.A.S. NagarPunjab160071India
4. Department of ChemistryIndian Institute of TechnologyRoparPunjab140001India