Author Affiliations

J. Wang,¹ I. Cotoros,¹ D. S. Chemla,¹ X. Liu,² J. K. Furdyna,² J. Chovan,³ and I. E. Perakis³

¹Materials Sciences Division, Lawrence Berkeley National Laboratory Department of Physics, University of California at Berkeley, Berkeley, California 94720, U.S.A

²Department of Physics, University of Notre Dame, Notre Dame, Indiana, 46556, U.S.A.

³Institute of Electronic Structure & Laser, Foundation for Research and Technology-Hellas and Department of Physics, University of Crete, Heraklion, Greece