1. Central Department of Physics, Tribhuvan University, Kirtipur, Kathmandu44613, Nepal
2. Padma Kanya Multiple Campus, Tribhuvan University, Bagbazar, Kathmandu44613, Nepal
3. Department of Oncology, Georgetown University, Washington, DC20057, United States
4. Department of Physics, Florida International University, Miami, Florida33199, United States
5. Biomolecular Sciences Institute, Florida International University, Miami, Florida33199, United States