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標題: | 應用奈米結構設計薄型化長焦距鏡頭 Design of thin telephoto lens by using nanostructures |
作者: | Tsung-Jung Chuang 莊宗融 |
指導教授: | 蘇國棟(Guo-Dung J. Su) |
關鍵字: | 超穎表面,次波長結構,相位梯度,超穎透鏡,望遠透鏡,光束追蹤模擬,有限時域差分模擬, metasurfaces,subwavelength structures,phase-gradient,metalenses,telephoto lens,ray tracing simulation,FDTD simulation, |
出版年 : | 2020 |
學位: | 碩士 |
摘要: | 近年來,由次波長結構所組成的超穎表面開始蓬勃發展。超穎表面是藉由界面上的相位梯度來改變光行進的方向,在所有的超穎表面中,超穎透鏡用於聚焦並應用於成像光學。與傳統的透鏡相比,超穎透鏡的優勢是平坦,精小且擁有非常薄的厚度。在本文中,我們提出了一種模擬方法結合光束追踪模擬(Ray tracing),有限時域差分法(FDTD),S參數方法和近遠場轉換,建立了一套設計超穎透鏡系統的標準操作流程。我們的模擬方法可以達到快速優化整個超穎透鏡系統,並使用有限時域差分法來建立並模擬由奈米結構所組成的超穎透鏡表面。我們的超穎透鏡系統縮小了整個系統的厚度並解決了傳統望遠鏡頭所遇到的體積大的問題。最後,我們驗證了我們的模擬方法成功地結合了兩種用於不同結構尺度的模擬工具,並且都能得到相同且一致的結果。此外,藉由這套模擬的操作流程,我們未來可以設計由超穎表面組成的各種光學系統。 In recent years, the metasurfaces composed of subwavelength structures start to flourish. It changes direction of light propagation by phase-gradient on the interface. Among all of the metasurfaces, the metalenses are used to focus, and are applied to image optics. The advantages of metalenses are flat, compact and largely reduce thickness compared to traditional bulk lens. In this thesis, we proposed a simulation methodology combining ray tracing simulation, FDTD simulation, S-parameter method, and near-to-far-field transformation, establishing a standard operation process to design metalenses system. Our simulation methodology achieved fast optimization of entire metalenses system and used FDTD simulation to construct the metasurfaces composed of nanostructures. Our metalenses system largely reduces the thickness and solves the bulk problem that traditional telephoto lens suffered from. Finally, we verify our simulation methodology that successfully combines two types of simulation tools, which are used on different structure scale, and they have identical results. Furthermore, with this simulation methodology, we can design variety of optical systems composed of metasurfaces in the future. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/53031 |
DOI: | 10.6342/NTU202002474 |
全文授權: | 有償授權 |
顯示於系所單位: | 光電工程學研究所 |
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U0001-0508202015275200.pdf 目前未授權公開取用 | 6.32 MB | Adobe PDF |
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