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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
Terahertz scattering by subwavelength cylindrical arrays.
Gretel M Png1, Christophe Fumeaux, Mark R Stringer
1School of Electrical and Electronic Engineering, University of Adelaide, SA 5005, Australia. gretel.png@adelaide.edu.au
Optics Express
|June 7, 2011
Summary
Full-wave electromagnetic simulations accurately verify terahertz (THz) spectroscopic measurements of subwavelength scatterers. This approach overcomes limitations of analytical solutions, revealing crucial near-field coupling effects for improved scattering analysis.
Area of Science:
- Electromagnetics
- Spectroscopy
- Materials Science
Background:
- Terahertz (THz) spectroscopy is used to study materials with subwavelength structures.
- Analytical solutions for scattering are limited, especially for multiple scatterers, as they neglect near-field coupling.
Purpose of the Study:
- To verify terahertz (THz) transmission-mode spectroscopic measurements using a full-wave electromagnetic field simulator.
- To investigate the limitations of analytical solutions in modeling THz scattering from periodic arrays of cylindrical scatterers.
Main Methods:
- Utilized a full-wave electromagnetic field simulator to model THz wave interaction with periodic arrays.
- Compared simulation results with experimental transmission-mode spectroscopic measurements.
Main Results:
- Full-wave simulations accurately elucidated experimental terahertz (THz) spectroscopic measurements.
- Analytical solutions, which ignore near-field mutual coupling, failed to accurately verify the measurements.
- Simulations provided insights into how test conditions influence scattering behavior.
Conclusions:
- Full-wave electromagnetic simulation is a reliable method for verifying terahertz (THz) spectroscopic measurements of complex scattering systems.
- Near-field mutual coupling is critical for accurate modeling of THz scattering in periodic arrays.
- This validated simulation approach enhances understanding of subwavelength scatterer behavior.
