[20p-A34-1~12] 3.8 Terahertz technologies

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)

[20p-A34-2] Plasmonic modes in a terahertz bandpass filter with a Babinet complementary metal mesh structure

〇(M1)Takuto Matsuki¹, Masahiro Ueda¹, Soto Wada¹, Takumi Oie¹, Yuta Watanabe¹, Yoshinori Shomitsu³, Toyoaki Suzuki², Takehiko Wada⁴, Toshihiro Nakaoka¹ (1.Sophia Univ., 2.ISAS/JAXA, 3.QUP/KEK, 4.NAOJ)

Keywords:

Band-pass filter,Metal mesh,Photonic band structure

We have investigated Si-based Babinet-complementary metal mesh filters as robust optical bandpass filters for space telescopes operating in the terahertz band. The main transmission mechanism of this filter is Fabry-Perot resonance due to the half-mirrors of the Au inductive and capacitive grids. In this paper, we report plasmonic modes localized in the upper and lower mirrors, respectively, which were observed in addition to the Fabry-Perot modes.