title: Equivalent-nanocircuit-theory-based design to infrared broad band-stop filters.
abstract: We theoretically introduced a design paradigm and tool by extending the circuit functionalities from radio frequency to near infrared domain, and a broad band-stop filter, is successfully demonstrated by cascading triple layers of nano-square arrays. The feasibility is confirmed by its consistency with the rigorous FDTD calculation. Moreover, such a third-order Butterworth filter is not only insensitive to the incident angle and but also to input light's polarization. The new paradigm forms a theoretical foundation for designing optical devices and also enriches the classic circuit operations at the optical frequency region.
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
authors.forename: Lihua
authors.initials: L
authors.lastname: Bai
authors.forename: Zhengyuan
authors.initials: Z
authors.lastname: Bai
authors.forename: Pidong
authors.initials: P
authors.lastname: Hu
authors.forename: Chengpu
authors.initials: C
authors.lastname: Liu