1. Nano-Device Laboratory (NDL) and Phonon Optimized Engineered Materials (POEM) Center, Department of Electrical and Computer Engineering, University of California, Riverside, California 92521, USA
2. HORIBA Scientific, Novato, California, 94949, USA
3. Department of Chemistry and Material Science and Engineering Program, University of California, Riverside, California 92521, USA
4. Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA
5. Laboratory for Terahertz and Terascale Electronics, Department of Electrical and Computer Engineering, University of California, Riverside, California 92521, USA
6. Center for Computational Materials Science, U.S. Naval Research Laboratory, Washington, DC 20375, USA