Optical Metamaterials: Design, Characterization and Applications
Chaturvedi, Pratik
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https://hdl.handle.net/2142/83936
Description
Title
Optical Metamaterials: Design, Characterization and Applications
Author(s)
Chaturvedi, Pratik
Issue Date
2009
Doctoral Committee Chair(s)
Fang, Nicholas X.
Department of Study
Mechanical Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Optics
Language
eng
Abstract
"I also demonstrate progress made in ""superlensing"", a phenomenon associated with plasmonic metamaterials, leading to subdiffraction resolution with optical imaging. Fabricating a smooth silver superlens (0.6nm root mean square roughness) with 15nm thickness, I demonstrate 30nm imaging resolution or 1/12th of the illumination wavelength (near-ultraviolet), far below the diffraction-limit. Moreover. I have extended subdiffraction imaging to far-field at infrared wavelengths. Utilizing a two-dimensional array of silver nanorods that provides near-field enhancement, I numerically show that subwavelength features can be resolved in far-field in the form of Moire features. Development of this unique far-field superlensing phenomenon at infrared wavelengths is of significant importance to chemical and biomedical imaging."
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