All dielectric metasurface based tunable optical modulator: Design and analysis

被引：7

作者：

Modi, Keshav Samrat ^{[1
,2
]}

Singh, Satya Pratap ^{[2
]}

Kaur, Jasleen ^{[1
,2
]}

Tiwari, Umesh ^{[1
,2
]}

Sinha, Ravindra Kumar ^{[3
]}

机构：

[1] Acad Sci & Innovat Res, Ghaziabad 201002, India

[2] Cent Sci Instruments Org CSIO, Council Sci & Ind Res CSIR, Computat Photon Lab, Chandigarh 160030, India

[3] Delhi Technol Univ, TIFAC Ctr Relevance & Excellence Fiber Opt & Opt, Dept Appl Phys, Bawana Rd, Delhi 110042, India

来源：

PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS | 2021年 / 43卷

关键词：

All-dielectric metasurface; Fano resonance; Liquid crystal; Optical modulation; FANO RESONANCE; REFRACTIVE-INDEX; METAMATERIALS; PERFORMANCE; ABSORPTION; TERAHERTZ;

D O I：

10.1016/j.photonics.2020.100881

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this article, we propose the design and analysis of all-dielectric metasurface based tunable optical modulator. The metasurface structure consists of split silicon arcs mounted over the indium tin oxide layer and the silica substrate. The nematic liquid crystal is used for tuning the Fano resonance peak of the metasurface and is filled between two indium tin oxide layers. The numerical investigation of the proposed metasurface for electro-optic modulation shows the modulator has a broadband tunability of 25 nm and modulation depth of 90 %. We have also numerically investigated the variation of the Fano resonance peak arising due to the fabrication non uniformities in the thickness, width and the split gap of the silicon arc.

引用

页数：7

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