Abstract

Recently, ultra-thin nano-strip antenna (thinner than skin depth) has attracted extensive attention as a key structure unit of metasurface. It can be used to realize anomalous enhanced reflection and absorption, as well as suppressed transmission, which has been used in photonic devices. However, there is still a lack of clear analysis to explain systematically these phenomena. In this paper, we present the concept of phase matching between the displacement current and the incident field, which initially leads to the anomalous scattering property of a single ultra-thin nano-strip antenna. Base on the property of a single nano-strip, we study the coupling of multi-nano-strip antennas and demonstrate that the randomized and periodic array of nano-strips have the same anomalous reflection spectrum. The phase matching is also reflected in the theoretic model, from which the reflection and transmission formulas for nano-strip array are derived. The formulas successfully predict the thickness influence on the reflection spectra of a periodic array. Our results can promote the development of ultra-thin nano-strip based metasurfaces.

© 2015 Optical Society of America

Optical metamirror: all-dielectric frequency-selective mirror with fully controllable reflection phase

Viktar Asadchy, Mohammad Albooyeh, and Sergei Tretyakov
J. Opt. Soc. Am. B 33(2) A16-A20 (2016)

Light-field enhancement on thin and ultra-thin high-index dielectric slabs with rectangular nano-pits

Jérôme Le Perchec
J. Opt. Soc. Am. B 36(8) 2266-2277 (2019)

Thin anisotropic metasurfaces for simultaneous light focusing and polarization manipulation

Mehdi Veysi, Caner Guclu, Ozdal Boyraz, and Filippo Capolino
J. Opt. Soc. Am. B 32(2) 318-323 (2015)

Nano shell impact on Huygens’ metasurface dipolar resonances and optical response

Hasan Kocer, Halil Isik, Yilmaz Durna, Bahram Khalichi, Hamza Kurt, and Ekmel Ozbay
J. Opt. Soc. Am. B 38(9) C127-C135 (2021)

Reflection compensation mediated by electric and magnetic resonances of all-dielectric metasurfaces [Invited]

Viktoriia E. Babicheva, Mihail I. Petrov, Kseniia V. Baryshnikova, and Pavel A. Belov
J. Opt. Soc. Am. B 34(7) D18-D28 (2017)