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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
Terahertz multichanneled filter in a superconducting photonic crystal
Wei-Hsiao Lin1, Chien-Jang Wu, Tzong-Jer Yang
1Institute of Microelectronics, Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan, Taiwan, Taiwan.
Optics Express
|January 4, 2011
Summary
Researchers theoretically investigated terahertz spectroscopic properties in a one-dimensional superconductor-dielectric photonic crystal. This study demonstrates a novel multichanneled terahertz transmission filter with comb-like resonant peaks, distinct from defect-based designs.
Area of Science:
- Condensed Matter Physics
- Optics and Photonics
- Materials Science
Background:
- Photonic crystals offer unique light manipulation properties.
- Superconductors exhibit distinct electromagnetic responses, especially at terahertz frequencies.
- Multichannel filters are crucial for various spectroscopic and communication applications.
Purpose of the Study:
- To theoretically investigate terahertz spectroscopic properties of a 1D superconductor-dielectric photonic crystal.
- To explore the potential of this structure as a multichannel terahertz transmission filter.
- To analyze the influence of temperature and structural parameters on filter performance.
Main Methods:
- Theoretical investigation using numerical calculations.
- Analysis of transmission spectra within the photonic passband.
- Examination of resonant peak behavior as a function of temperature and filling factor.
Main Results:
- A terahertz multichanneled transmission filter was theoretically achieved.
- The filter exhibits comb-like resonant peaks in its transmission spectrum at low temperatures.
- The number of resonant peaks correlates with the number of periods in the crystal.
- Increasing temperature lowers and broadens the resonant peaks.
Conclusions:
- The proposed 1D superconductor-dielectric photonic crystal can function as a temperature-tunable multichannel terahertz filter.
- This defect-free structure offers a novel approach to designing multichannel filters, differing from conventional defect-based photonic crystal filters.
- The findings provide a theoretical basis for developing advanced terahertz optical devices.
