About the Authors

Kavya Mohan

Affiliation Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, India

Subhajit B. Purnapatra

Affiliation Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, India

Partha Pratim Mondal

partha@iap.iisc.ernet.in

Affiliations Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, India, Applied Photonics Initiative, Indian Institute of Science, Bangalore, India

Competing Interests

Edmund Optics provided minor equipments/consumables. This does not alter the authors’ adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: PPM. Performed the experiments: SBP KM PPM. Analyzed the data: SBP KM PPM. Contributed reagents/materials/analysis tools: SBP KM PPM. Wrote the paper: PPM SBP KM.