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From Metasurfaces to Compact Optical Metasystems

Citation

Faraji-Dana, MohammadSadegh (2020) From Metasurfaces to Compact Optical Metasystems. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/kvsy-ve81. https://resolver.caltech.edu/CaltechTHESIS:08042020-093945451

Abstract

Optical metasurfaces are a class of ultra-thin diffractive optical elements, which can control different properties of light such as amplitude, phase, polarization and direction at various wavelengths. The compatibility of optical metasurfaces with standard micro- and nano-fabrication processes makes them highly-suitable for realization of compact and planar form optical devices and systems. In addition, optical metasurfaces have achieved unique and unprecedented functionalities not possible by conventional diffractive or refractive optical elements. In this thesis, after a short review on the history and state of the art optical metasurfaces, I will discuss the systems consisting of optical metasurfaces, called optical meta-systems, which allow for implementations of complicated optical functions, such as wide field of view imaging and projection, tunable cameras, retro-reflection, phase-imaging, multi-color imaging, etc. Thereafter, the concept of folded metasurface optics is introduced and a compact folded metasurface spectrometer is showcased to demonstrate how the folded meta-systems can be designed, fabricated and practically utilized for real-life applications. Furthermore, different approaches for implementation of miniaturized hyperspectral imagers are investigated, among which the folded metasurface optics and a computational scheme using a random metasurface mask will be highlighted. Other potentials of optical metasurfaces achieved by the employment of optimization techniques to improve their multi-functional performances, as well as example applications in realizing optical vortex cornographs are studied. Finally, I will conclude the dissertation with an outlook on further applications of optical metasurfaces, where they can surpass the performance of current optical devices and systems and what limitations are still to be overcome before we can expect their wide-spread applications in our daily life.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Optics, Optical Metasurfaces, Nanophotonics, Diffractive Optics, Spectrometer, Hyperspectral Imager
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Electrical Engineering
Thesis Availability:Restricted to Caltech community only
Research Advisor(s):
  • Faraon, Andrei
Thesis Committee:
  • Marandi, Alireza (chair)
  • Tai, Yu-Chong
  • Wang, Lihong
  • Yariv, Amnon
  • Faraon, Andrei
Defense Date:5 June 2020
Non-Caltech Author Email:msfana (AT) gmail.com
Record Number:CaltechTHESIS:08042020-093945451
Persistent URL:https://resolver.caltech.edu/CaltechTHESIS:08042020-093945451
DOI:10.7907/kvsy-ve81
Related URLs:
URLURL TypeDescription
https://doi.org/10.1515/nanoph-2017-0129DOIArticle adapted for Chapters 1 and 5.
https://doi.org/10.1038/s41467-018-06495-5DOIArticle adapted for Chapter 2.
https://doi.org/10.1021/acsphotonics.9b00744DOIArticle adapted for Chapter 3.
ORCID:
AuthorORCID
Faraji-Dana, MohammadSadegh0000-0002-8012-1253
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:13845
Collection:CaltechTHESIS
Deposited By: Mohammad Sadegh Faraji Dana
Deposited On:20 Oct 2020 16:46
Last Modified:20 Oct 2020 16:46

Thesis Files

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