1. Photonic Materials Metrology Sub Division, Advanced Materials and Device Metrology Division, CSIR—National Physical Laboratory, Dr K S Krishnan Road, New Delhi 110012, India
2. Academy of Scientific and Innovative Research (AcSIR), CSIR—National Physical Laboratory Campus, Dr K S Krishnan Road, New Delhi 110012, India
3. Mass Metrology Sub Division, Physico Mechanical Metrology Division, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi 110012, India