1. Department of Materials Science and Engineering The University of Texas at Dallas 800 West Campbell Road Richardson TX 75080‐3021 USA
2. Department of Electrical and Computer Engineering The University of Texas at Dallas 800 West Campbell Road Richardson TX 75080‐3021 USA
3. Department of Physics The University of Texas at Dallas 800 West Campbell Road Richardson TX 75080‐3021 USA
4. NanoTech Institute The University of Texas at Dallas 800 West Campbell Road Richardson TX 75080‐3021 USA
5. The School of Physics and Engineering ITMO University St. Petersburg 197101 Russia