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Field Enhancement in Nano Photonic A...

Alali, Fatema Abdullah.

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Field Enhancement in Nano Photonic Applications: Transition Metamaterials, Plasmonics and Chirality.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Field Enhancement in Nano Photonic Applications: Transition Metamaterials, Plasmonics and Chirality./
作者:	Alali, Fatema Abdullah.
面頁冊數:	84 p.
附註:	Source: Dissertation Abstracts International, Volume: 74-10(E), Section: B.
Contained By:	Dissertation Abstracts International74-10B(E).
標題:	Electrical engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3565714
ISBN:	9781303159039

Field Enhancement in Nano Photonic Applications: Transition Metamaterials, Plasmonics and Chirality.
Alali, Fatema Abdullah.

Field Enhancement in Nano Photonic Applications: Transition Metamaterials, Plasmonics and Chirality. - 84 p.

Source: Dissertation Abstracts International, Volume: 74-10(E), Section: B.

Thesis (Ph.D.)--State University of New York at Buffalo, 2013.

This dissertation includes four chapters. Chapter 1 contains a brief introduction to the field of nanophotonics and an overview of the topics studied and methods used in this research. Chapters 2, 3 and 4 each deal with distinct and major applications of nanophotonics. Chapter 2 focuses exclusively on metamaterials, specifically transition metamaterials were the refractive index gradually decreases from positive to negative values passing through a near zero value point along the direction of propagation. We investigate the propagation of a Gaussian beam through such materials and show for the first time that unlike the case of plain waves, Gaussian beam field enhancement near the zero refractive index is attainable for normal incident. Such materials can be used for light manipulation applications such as cloaking and field concentrators.

ISBN: 9781303159039Subjects--Topical Terms:

649834
Electrical engineering.

Field Enhancement in Nano Photonic Applications: Transition Metamaterials, Plasmonics and Chirality.
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245 1 0 $a Field Enhancement in Nano Photonic Applications: Transition Metamaterials, Plasmonics and Chirality.
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500 $a Source: Dissertation Abstracts International, Volume: 74-10(E), Section: B.
500 $a Adviser: Edward P. Furlani.
502 $a Thesis (Ph.D.)--State University of New York at Buffalo, 2013.
520 $a This dissertation includes four chapters. Chapter 1 contains a brief introduction to the field of nanophotonics and an overview of the topics studied and methods used in this research. Chapters 2, 3 and 4 each deal with distinct and major applications of nanophotonics. Chapter 2 focuses exclusively on metamaterials, specifically transition metamaterials were the refractive index gradually decreases from positive to negative values passing through a near zero value point along the direction of propagation. We investigate the propagation of a Gaussian beam through such materials and show for the first time that unlike the case of plain waves, Gaussian beam field enhancement near the zero refractive index is attainable for normal incident. Such materials can be used for light manipulation applications such as cloaking and field concentrators.
520 $a The next chapter, Chapter 3, deals with plasmonics, the science and applications of plasmons. We study the Localized Surface Plasmon Resonance (LSPR) of metallic Au nanotori and nanoring structures and compare their absorption as a function or orientation to that of other nanoparticles (nanospheres and nanorods), specifically for biomedical applications, especially photothermal therapy. We show that nanotori (nanorings) have higher averaged absorption for random orientations, which makes them well-suited for colloidal heating applications such as photothermal cancer therapy.
520 $a Finally, in Chapter 4 we investigate methods for enhancing optical rotation in artificial chiral materials. We introduce the concept of multiscale chirality, a superposition of geometric and molecular chirality, to boost the effective chirality parameter kappa of a material and consequently its optical activity. The goal is to obtain a sufficiently high kappa to achieve an effective negative refractive index without requiring simultaneous negative values of permittivity and permeability, which are difficult to achieve at optical wavelengths. We also use plasmonics to enhance both molecularly chiral media and media consisting of 2D dielectric chiral shapes to achieve giant optical rotation in both systems. We demonstrate that this can be utilized in applications such as biosensing and adapative optofluidic polarizers.
590 $a School code: 0656.
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