1. Agnitron Technology Incorporated, Eden Prairie, Minnesota 55346, USA
2. CREOL, The College of Optics and Photonics, University of Central Florida, 4000 Central Florida Blvd., Orlando, Florida 32816, USA
3. BRIDG, 200 NeoCity Way, NeoCity, Florida 34744, USA
4. Materials Department, University of California, Santa Barbara, California 93106, USA
5. Electrical and Computer Engineering, Saint Cloud State University, St. Cloud, Minnesota 56301, USA