1. University of Arkansas, Department of Physics, Fayetteville, Arkansas, United StatesbUniversity of Central Arkansas, Department of Physics and Astronomy, Conway, Arkansas, United States
2. University of Arkansas, Microelectronics-Photonics Graduate Program, Fayetteville, Arkansas, United States
3. University of Arkansas, Department of Physics, Fayetteville, Arkansas, United StatescUniversity of Arkansas, Microelectronics-Photonics Graduate Program, Fayetteville, Arkansas, United States
4. University of Arkansas, Department of Electrical Engineering, Fayetteville, Arkansas, United States