1. Center for Photonics Innovation, Arizona State University, Tempe, Arizona 85287, USA
2. School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, Arizona 85287, USA
3. School of Electrical, Computer, and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA
4. LeRoy Eyring Center for Solid State Science, Arizona State University, Tempe, Arizona 85287, USA