Presentation Information
[22p-P04-23]Realization of a narrowband notch filter using the Brewster effect in metafilms
〇(M1)Tomohiro Hoshino1, Yasuhiro Tamayama1 (1.Nagaoka Univ. Tech.)
Keywords:
metamaterial,Brewster phenomenon,perfect absorption
Brewster phenomenon is known as a reflectionless phenomenon at the interface of two different media. This reflectionless phenomenon is observed when the direction of oscillation of the electric dipole induced in the medium coincides with the propagation direction of the reflected wave. It has been shown that this phenomenon can be extended to a single layer of metamaterial (Brewster metafilm). Brewster metafilm exhibits frequency-independent non-reflective properties, with zero transmission at the resonant frequency when the non-radiative and radiative losses of the metafilm are equal. In this study, we considered that a very narrow-band notch filter can be realized by controlling these losses small. For this purpose, we designed a Brewster metafilm composed only of metal to eliminate dielectric loss. Numerical calculations and experiments confirm that the transmittance of Brewster metafilm is zero at the resonant frequency.