全介電幾何相位超穎表面的設計、優化及簡化模型;Design, optimization and simplified model for all-dielectric geometric phase metasurface

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/84971

Title:	全介電幾何相位超穎表面的設計、優化及簡化模型;Design, optimization and simplified model for all-dielectric geometric phase metasurface
Authors:	余宸逸;Yu, Chen-Yi
Contributors:	光電科學與工程學系
Keywords:	幾何相位;超穎表面;超穎透鏡;等校介質近似理論;PB-Phase;metasurface;metalens;EMT
Date:	2021-01-21
Issue Date:	2021-03-18 17:04:58 (UTC+8)
Publisher:	國立中央大學
Abstract:	本論文將PB-phase之超穎介面簡化為波板模型，入射光受超穎介面轉為正交偏振態帶有幾何相位，剩餘通過的光帶有動態相位。吾人利用等效介質理論計算超穎介面Unit cell之非等向性之折射率，透過設計Unit cell厚度達到半波板來消除動態相位之影響，讓超穎介面的整體相位為幾何相位效應。將設計完之Unit cell排列為梯度表面超穎介面之相位分布組成Meta-device，透過粒子群最佳化來對Meta-device之相位分布均勻性做優化，使其繞射效率提升。;We simplify the PB-phase supernatural interface into a waveplate model where the incident light is polarized orthogonally by the supernatural interface into a geometric phase and the remaining passing light band has a dynamic phase. We calculate the non-isotropic refractive index of the unit cell of the supernatural interface by using the effective medium approximation theory and design the unit cell to be half-wave plate to eliminate the dynamic phase effect. The phase distribution of the designed unit cell is arranged as a gradient surface to form a Meta-device, and the phase distribution uniformity of the Meta-device is optimized by particle cluster optimization to improve the diffraction efficiency.
Appears in Collections:	[Graduate Institute of Optics and Photonics] Electronic Thesis & Dissertation

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