Presentation Information

10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation AwardEnglish Presentation

[8a-A22-5]Ultrahigh-Q Perfect Absorption in Silicon Waveguide on Mirror Structure Associated with Bound State in The Continuum

〇YuAn Chen¹, Chang-Wei Chu¹, Ming-Hsun Wang-Chang¹, Bo-Tai Huang¹, Jin-Ruei Shih¹, Yang-Chun Lee¹ (1.Natl. Taiwan Univ. Sci. Technol.)

Keywords:

Ultrahigh quality factor,Perfect absorption,Bound states in the continuum

Significant progress has been made in developing perfect absorbers with high efficiency and ultra-narrow bandwidth based on bound states in the continuum (BIC). However, the quality factor (Q-factor) remains limited. Here, we propose a waveguide structure combined with a metallic mirror to realize an ultra-narrow bandwidth perfect absorber through BIC. With proper spacer thickness, an absorptance larger than 0.97 and a Q-factor up to 1.4 x 10^7 are achieved, which is comparable to or even larger than values in reported studies.

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