P. Kelkar1, V. G. Kozlov1, Heonsu Jeon1, A. V. Nurmikko1, C. C. Chu2, D. C. Grillo2, Jung Han2, C. G. Hua2, R. L. Gunshor2
1Division of Engineering and Department of Physics, Brown University, Providence, Rhode Island 02912
2School of Electrical Engineering, Purdue University, West Lafayette, Indiana 47907