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Thesis Defense

Graduate and Postdoctoral Studies
Electrical and Computer Engineering

Speaker: Weilu Gao
Masters Candidate

Graphene Photonic Devices for Terahertz and Mid-Infrared

Monday, July 15, 2013
3:30 PM  to 5:00 PM

200  Brockman Hall for Physics


As a zero-bandgap material, the unique optical and electronic properties of graphene attract much interest in material science, condensed matter physics and engineering. The exceptionally high carrier mobility at room temperature allows graphene to efficiently interact with terahertz (THz) and mid-infrared (MIR) waves, despite its single-atom-layer thickness. The propagation of these waves can be actively controlled by electrically tuning the carrier density in graphene. In this study, we utilize the extraordinary optical transmission (EOT) structure with graphene underneath to build a new type of graphene-THz modulator, and we integrate graphene with silicon gratings to excite and actively control plasmonic waves in MIR region. Furthermore, the interactions between graphene and resonators are investigated and future integration with 2D transition metal dichalcogenides will be discussed.

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