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Meta-mirrors with transverse invariance for beam shaping
Author(s): Yu-Chieh Cheng; Pei-Yu Wang; Ramon Herrero; Muriel Botey; Kestutis Staliunas
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Paper Abstract

The paper demonstrates spatial filtering in reflection based on meta-mirrors, composed of periodic subwavelength gratings. The periodic modulation of the refraction index on the sub-micron scale exhibits optical beam shaping with transverse invariance. The paper starts with a theoretical model for the proposed metamirrors based on multiple scattering theory. The results from the proposed analytical model coincide with the that from FDTD simulations. The analytical studies in the paper show that the filtering performance is enhanced by structured cavities where Mie resonances occur. Observations of different Mie resonances for varying units of the meta-mirrors are also presented in this paper. The metamirror may serve as a versatile tool for narrowing beam with high efficiency and transverse invariance.

Paper Details

Date Published: 5 September 2019
PDF: 6 pages
Proc. SPIE 11080, Metamaterials, Metadevices, and Metasystems 2019, 1108027 (5 September 2019); doi: 10.1117/12.2530176
Show Author Affiliations
Yu-Chieh Cheng, National Taipei Univ. of Technology (Taiwan)
Pei-Yu Wang, National Taipei Univ. of Technology (Taiwan)
Ramon Herrero, Univ. Politècnica de Catalunya (Spain)
Muriel Botey, Univ. Politècnica de Catalunya (Spain)
Kestutis Staliunas, Univ. Politècnica de Catalunya (Spain)
Institució Catalana de Recerca i Estudis Avançats (Spain)


Published in SPIE Proceedings Vol. 11080:
Metamaterials, Metadevices, and Metasystems 2019
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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