About the Authors

Afaf Al Lawati

Affiliation Department of Physics, College of Science, Sultan Qaboos University, Al Khod, Oman

Issam Ali

issam@squ.edu.om

Affiliation Department of Physics, College of Science, Sultan Qaboos University, Al Khod, Oman

Muataz Al Barwani

Affiliation Department of Physics, College of Science, Sultan Qaboos University, Al Khod, Oman

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AAL IA. Performed the experiments: AAL IA. Analyzed the data: AAL IA MAB. Wrote the paper: AAL IA.