Meta-mirrors with transverse invariance for beam shaping

Yu-Chieh Cheng; Pei-Yu Wang; Ramon Herrero; Muriel Botey; Kestutis Staliunas

doi:10.1117/12.2530176

5 September 2019 Meta-mirrors with transverse invariance for beam shaping

Yu-Chieh Cheng, Pei-Yu Wang, Ramon Herrero, Muriel Botey, Kestutis Staliunas

Proceedings Volume 11080, Metamaterials, Metadevices, and Metasystems 2019; 1108027 (2019) https://doi.org/10.1117/12.2530176
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

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.

Citation Download Citation

Yu-Chieh Cheng, Pei-Yu Wang, Ramon Herrero, Muriel Botey, and Kestutis Staliunas "Meta-mirrors with transverse invariance for beam shaping", Proc. SPIE 11080, Metamaterials, Metadevices, and Metasystems 2019, 1108027 (5 September 2019); https://doi.org/10.1117/12.2530176

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