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Title:
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Meta-mirrors with transverse invariance for beam shaping
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Author:
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Cheng, Yu-Chieh; Wang, Pei-Yu; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Física; Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers |
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Abstract:
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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. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Física
-Photonics
-Light filters
-Photonic crystal
-Beam shaping
-Angular filtering
-Reflective grating
-Fotònica
-Llum -- Filtres
-Difracció |
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Rights:
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Document type:
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Article - Submitted version
Conference Object |
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Published by:
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International Society for Photo-Optical Instrumentation Engineers (SPIE)
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