1. Department of Physics American University of Sharjah Sharjah 26666 United Arab Emirates
2. Materials Science and Engineering Program College of Arts and Sciences American University of Sharjah Sharjah 26666 United Arab Emirates
3. Department of Applied Physics and Astronomy University of Sharjah Sharjah 27272 United Arab Emirates
4. Center for Advanced Materials Research University of Sharjah Sharjah 27272 United Arab Emirates