| Name | Affiliation | Period |
|---|---|---|
| Prof. Christos Flytzanis | École Normale Supérieure / The Centre National de la Recherche Scientifique (ENS/CNRS), France | June 2014 - July 2014 |
| Dr. Paulo Santos | Paul Drude Institute for Solid State Electronics, Germany | Oct. 2014 - Dec. 2014 |
| Dr. Jason Brown | University of Oxford, U.K. | June 2014 - June 2014 |