Metamaterial resonant absorbers for terahertz sensing
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Authors
Stinson, Eric A.
Subjects
terahertz sensors
metamaterials
uncooled detectors
metamaterials
uncooled detectors
Advisors
Karunasiri, Gamani
Alves, Fabio
Date of Issue
2015-12
Date
Dec-15
Publisher
Monterey, California: Naval Postgraduate School
Language
Abstract
The aim of this work is to develop a metamaterial absorber that can be incorporated into a terahertz (THz) imaging system with a 4.7 THz quantum cascade laser (QCL) illumination source. Finite element (FE) simulations were utilized to design metamaterials, and a Fourier transform infrared spectrometer (FTIR) was employed to characterize the absorption spectrum of each metamaterial configuration. Process parameters for future work with the microfabrication devices have been established for the Naval Postgraduate School clean room. Analysis of experimental data provided insight in determining the refractive index of the metamaterial dielectric, SiOx, from 3–8 THz and confirmed the Lorentzian shape for the absorption spectrum as theoretically proposed by another group. Future work will incorporate the metamaterial absorber design of this research into a more efficient, cost effective, bi-material THz sensor that can be employed in a variety of naval applications.
Type
Thesis
Description
Series/Report No
Department
Physics
Physics
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Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.