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Flat Optics for Light Steering and S...

Li, Zhongyang.

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Flat Optics for Light Steering and Spectrum Engineering at the Nanoscale.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Flat Optics for Light Steering and Spectrum Engineering at the Nanoscale./
作者:	Li, Zhongyang.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:	135 p.
附註:	Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
Contained By:	Dissertation Abstracts International78-10B(E).
標題:	Optics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10274616
ISBN:	9781369818185

Flat Optics for Light Steering and Spectrum Engineering at the Nanoscale.
Li, Zhongyang.

Flat Optics for Light Steering and Spectrum Engineering at the Nanoscale. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 135 p.

Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.

Thesis (Ph.D.)--Northwestern University, 2017.

This dissertation focuses on exploring novel light steering and spectral engineering functionalities by flat optics, which includes photonic architectures of flat plasmonic metasurfaces, nanoparticle arrays, and thin film coatings. We have designed, fabricated and characterized different plasmonic metasurfaces (trapezoid-shaped antennas, nanorings/nanowires, etc.), nanoparticle arrays (single-layered or multilayered nanocubes and nanodisks), and thin film coatings, to understand the interaction between light and nanoscale photonic materials and to control and manipulate these interactions at will.

ISBN: 9781369818185Subjects--Topical Terms:

517925
Optics.

Flat Optics for Light Steering and Spectrum Engineering at the Nanoscale.
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520 $a This dissertation focuses on exploring novel light steering and spectral engineering functionalities by flat optics, which includes photonic architectures of flat plasmonic metasurfaces, nanoparticle arrays, and thin film coatings. We have designed, fabricated and characterized different plasmonic metasurfaces (trapezoid-shaped antennas, nanorings/nanowires, etc.), nanoparticle arrays (single-layered or multilayered nanocubes and nanodisks), and thin film coatings, to understand the interaction between light and nanoscale photonic materials and to control and manipulate these interactions at will.
520 $a We have theoretically and experimentally demonstrated broadband visible light steering and ultra-wide angle spectrum splitting based on flat trapezoid-antenna metasurfaces. Through gradual and continuous change of optical antenna, we enabled quasi-continuous interfacial phase shift that significantly improved the operation bandwidth and the conversion efficiency for light steering. By composing two opposite-faced trapezoids as the building block, we provided an alternative and additional control of the interfacial phase gradient for different visible wavelengths and demonstrated arbitrary wide-angle spectrum splitting.
520 $a We also investigated novel ways to engineer the spectral response of plasmonic metasurfaces, nanoparticle arrays, and thin film coatings. Specifically, we have explored spectral engineering of resonant absorption in plasmonic absorbers. We achieved ultra-narrow band resonant absorption peaks by plasmonic nanowire/nanoring metasurface designs based on surface lattice resonance mode. We measured near-unity absorption (over 90%) with a bandwidth of 12 nm in the visible regime. Beyond that, by combing the top-down and bottom-up fabrication methods, we investigated plasmonic absorbers based on DNA self-assembly nanoparticle (nanocubes and nanodisks) arrays. Single-layered nanocube arrays are shown to provide both photonic lattice mode and plasmonic gap modes resulting in resonant absorption. Multilayered nanoparticle arrays (nanodisk with nanocubes) are predicted to exhibit tunable broadband absorption by actively tuning the DNA length. The last but not the least, we proposed and demonstrated a lithography-free approach to realize large-area color filters and absorbers using multilayered thin film coatings in UV/visible/IR wavelengths. Such flat thin film coatings based on Fabry-Perot cavity provide extreme simplicity, higher performance and cost-effective manufacturing convenience for practical industrial production.
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