Haoye Qin

EECS Department, University of California, Berkeley

Technical Report No. UCB/EECS-2023-33

May 1, 2023

http://www2.eecs.berkeley.edu/Pubs/TechRpts/2023/EECS-2023-33.pdf

Optical nanostructures like high contrast gratings and metasurfaces have received increasing interests for their capability in tailoring wave propagation with optical flatness. Basics optical properties (amplitude, phase, and polarization) can be effectively tuned and controlled by a designed nanostructures, which is beneficial for applications in science and engineering. Here we investigate the optical metasurfaces for realization of bound states in the continuum (BICs) and exceptional points (EPs), and employ the polarization selective feature in high contrast grating to reach high performance linear and circular polarizers. Optical BICs are demonstrated in enhancing optical forces, chirality, nonlinear harmonics generation, and nonlinear chirality. Optical EPs are explored with eigenmodes and transmission matrix, and proposed to improve sensitivity in refractive index change and gyroscopes. Silicon nitride HCG and metal grating are designed and verified for polarization generation and control.

Advisors: Constance Chang-Hasnain and Boubacar Kanté

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BibTeX citation:

@mastersthesis{Qin:EECS-2023-33,
    Author= {Qin, Haoye},
    Title= {Optical Meta-structures for Exceptional Points, Bound States in the Continuum, and Polarization Control},
    School= {EECS Department, University of California, Berkeley},
    Year= {2023},
    Month= {May},
    Url= {http://www2.eecs.berkeley.edu/Pubs/TechRpts/2023/EECS-2023-33.html},
    Number= {UCB/EECS-2023-33},
    Abstract= {Optical nanostructures like high contrast gratings and metasurfaces have received increasing interests for their capability in tailoring wave propagation with optical flatness. Basics optical properties (amplitude, phase, and polarization) can be effectively tuned and controlled by a designed nanostructures, which is beneficial for applications in science and engineering. Here we investigate the optical metasurfaces for realization of bound states in the continuum (BICs) and exceptional points (EPs), and employ the polarization selective feature in high contrast grating to reach high performance linear and circular polarizers. Optical BICs are demonstrated in enhancing optical forces, chirality, nonlinear harmonics generation, and nonlinear chirality. Optical EPs are explored with eigenmodes and transmission matrix, and proposed to improve sensitivity in refractive index change and gyroscopes. Silicon nitride HCG and metal grating are designed and verified for polarization generation and control.},
}

EndNote citation:

%0 Thesis
%A Qin, Haoye 
%T Optical Meta-structures for Exceptional Points, Bound States in the Continuum, and Polarization Control
%I EECS Department, University of California, Berkeley
%D 2023
%8 May 1
%@ UCB/EECS-2023-33
%U http://www2.eecs.berkeley.edu/Pubs/TechRpts/2023/EECS-2023-33.html
%F Qin:EECS-2023-33