1. Materials Department, University of California, Santa Barbara, California 93106, USA
2. Center for Opto-electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, South Korea
3. EAG Laboratories—Eurofins Materials Science, 628 Hutton St. Suite 103, Raleigh, North Carolina 27606, USA
4. Quintessent Inc., Santa Barbara, California 93102, USA
5. Electrical and Computer Engineering Department, University of California, Santa Barbara, California 93106, USA
6. Intel Corporation, Santa Clara, California 95054, USA