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Intensity modulation lens on the basis of nano-scale golden rods and liquid crystal layer

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Abstract

In this paper, an active 2D plasmonic lens has been carefully designed to achieve intensity beam modulation. The design has been thoroughly studied by using rigorous finite element method (FEM). Combination of silicon oxide (SiO2), nematic liquid crystal (NLC) layer and array of non-uniform nano-scale golden (Au) rods along with finely optimized geometry paved the way to achieve good modulation intensity in terms of extinction ratio of about 3.5 dB. Further, the tolerance analysis reveals that the performance of the suggested intensity-modulation lens is almost unchangeable with ± 15 nm variation in the nano-scale golden rods dimensions. Additionally, the proposed lens has been examined using different noble metals such as silver (Ag) and Aluminum (Al). In comparison with other reported lenses, the proposed lenses based Ag, Al and Au have relatively smaller dimensions, maximum intensity amplification factors of about 10.4, 16.6 and 12.5; respectively. The proposed lens may render itself as an efficient unit in the ultra-high nano scale integrated optical systems.

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Authors and Affiliations

  1. Centre for Photonics and Smart Materials, Zewail City of Science and Technology, Sheikh Zayed District, 6th of October City, Giza, Egypt

    Nihal F. F. Areed, A. M. Heikal & Salah S. A. Obayya

  2. Department of Electronics and Communications Engineering, Faculty of Engineering, Mansoura University, Mansoura, Egypt

    Nihal F. F. Areed, Marwa El-Baz, A. M. Heikal & Salah S. A. Obayya

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  1. Nihal F. F. Areed
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  2. Marwa El-Baz
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  3. A. M. Heikal
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  4. Salah S. A. Obayya
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Correspondence to Salah S. A. Obayya.

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This article is part of the Topical Collection on Optical Wave and Waveguide Theory and Numerical Modelling, OQTNM 2017.

Guest Edited by Bastiaan Pieter de Hon, Sander Johannes Floris, Manfred Hammer, Dirk Schulz, Anne-Laure Fehrembach.

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Areed, N.F.F., El-Baz, M., Heikal, A.M. et al. Intensity modulation lens on the basis of nano-scale golden rods and liquid crystal layer. Opt Quant Electron 50, 240 (2018). https://doi.org/10.1007/s11082-018-1501-5

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