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From Metasurfaces to Compact Optical Metasystems


Faraji Dana, Mohammad Sadegh (2021) From Metasurfaces to Compact Optical Metasystems. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/kvsy-ve81.


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:Public (worldwide access)
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)
Record Number:CaltechTHESIS:08042020-093945451
Persistent URL:
Related URLs:
URLURL TypeDescription adapted for Chapters 1 and 5. adapted for Chapter 2. adapted for Chapter 3.
Faraji Dana, Mohammad Sadegh0000-0002-8012-1253
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:13845
Deposited By: Mohammad Sadegh Faraji Dana
Deposited On:20 Oct 2020 16:46
Last Modified:02 Nov 2021 00:16

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