Skip to Main Content
 

Global Search Box

 
 
 

ETD Abstract Container

Abstract Header

4-Gap Asymmetric Terahertz Metasurfaces

Burrow, Joshua Anthony
http://orcid.org/0000-0002-1237-4662
http://rave.ohiolink.edu/etdc/view?acc_num=dayton150091131322781

Abstract Details

2017, Master of Science (M.S.), University of Dayton, Electro-Optics.
Achieving high quality (Q)-factor resonant modes allows for drastic improvement of performance in many plasmonic structures. However, the excitation of high Q-factor resonances, especially multiple high q-factor resonances, has been a huge challenge in traditional metamaterials (MMs) due to ohmic and radiation losses. Here, we experimentally demonstrate simultaneous excitation of double Gaussian line shape resonances in a terahertz (THz) MM composed of an asymmetric 4-gap ring resonator. In a symmetric 4-gap ring resonator only the low Q-factor asymmetrically line shaped inductance-capacitive (LC) and dipole modes can be excited from an incident THz wave. By vertically displacing two adjacent arms a distance δ ≥ 40µm the fourfold symmetry of the planar MM breaks leading to two additional polarization dependent and frequency invariant higher Q-factor modes. The symmetry broken high Q-factor modes can be exploited for multi-band filters, slow light devices, and ultra-sensitive sensors. Therefore, we studied the performances of the symmetric and asymmetric MM devices as ultra-flexible biological sensors. An analyte of Bovine Serum Albumin (BSA) is applied to the surface of the MM causing each mode to uniquely red-shift linearly to the concentration of BSA. The results demonstrate the usefulness of a cost-effective THz planar MM-assisted biological sensor that could be used in food product quality, environmental monitoring, and global health care.
Jay Mathews (Advisor)
Imad Agha (Committee Member)
Andrew Sarangan (Committee Member)
Thomas Searles (Committee Member)
53 p.
Electrical Engineering; Optics; Physics
terahertz; metamaterial; metasurface; asymmetric; bio-sensing; bio-sensor

Recommended Citations

Citations

  • Burrow, J. A. (2017). 4-Gap Asymmetric Terahertz Metasurfaces [Master's thesis, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton150091131322781

    APA Style (7th edition)

  • Burrow, Joshua. 4-Gap Asymmetric Terahertz Metasurfaces. 2017. University of Dayton, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=dayton150091131322781.

    MLA Style (8th edition)

  • Burrow, Joshua. "4-Gap Asymmetric Terahertz Metasurfaces." Master's thesis, University of Dayton, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=dayton150091131322781

    Chicago Manual of Style (17th edition)

dayton150091131322781
481
© 2017, all rights reserved.
This open access ETD is published by University of Dayton and OhioLINK.