About the Authors

Deepak K. Jangir

Affiliation Quantum Optics and Photon Physics, National Physical Laboratory, Council of Scientific and Industrial Research, New Delhi, India

Suman Kundu

Affiliation Department of Biochemistry, University of Delhi South Campus, New Delhi, India

Ranjana Mehrotra

ranjana@mail.nplindia.ernet.in

Affiliation Quantum Optics and Photon Physics, National Physical Laboratory, Council of Scientific and Industrial Research, New Delhi, India

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DKJ RM SK. Performed the experiments: DKJ. Analyzed the data: DKJ RM. Contributed reagents/materials/analysis tools: RM SK. Wrote the paper: DKJ RM SK.