1. Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, United States
2. Exponent Inc., Menlo Park, California 94025, United States
3. Department of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
4. CREOL, The College of Optics and Photonics, University of Central Florida, 4000 Central Florida Boulevard, Orlando, Florida 32816, United States