Mid Term Review

Terahertz Metasurfaces

Date & time

Fri 12 May 2017, 2–3pm

Location

Room:

Oliphant Seminar Room

Audience

Members of RSPE welcome

Contact

(02)61253063
Mr Michael Cole
Nonlinear Physics Centre

The development of novel terahertz metamaterials is critical to unlocking the vast array of potential applications in this region of the electromagnetic spectrum, including: security, communications, chemical sensing, and biomedical applications. As with any part of the spectrum, absolute control is the goal and one of the main challenges facing terahertz is efficient detectors. In order to have an accurate detector, one needs a favorable absorber and to that end, we have designed and numerically analyzed an all dielectric Huygens’ metasurface that acts as a near-perfect terahertz absorber. Another contribution to the manipulation of terahertz waves is our experimental and numerical analysis of three different chiral metasurfaces that demonstrate strong broadband terahertz optical activity through control of the Blaschke phase. In addition, follow up projects to both of these topics will be discussed briefly. Finally, I will introduce my current work which explores the advantages of omega-type bianisotropic metasurfaces (O-BMSs) over Huygens’ metasurfaces for large angle refraction (>60 degrees) in the terahertz regime.

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