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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
T-shaped plasmonic array as a narrow-band thermal emitter or biosensor.
Yia-Chung Chang1, Chih-Ming Wang, Mohammed N Abbas
1Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan, ROC.
Optics Express
|August 6, 2009
Summary
This study introduces a T-shaped plasmonic array for thermal emission and biosensing. The proposed structure exhibits a distinct resonant dip and can function as a sensitive organic material sensor.
Area of Science:
- Plasmonics
- Nanophotonics
- Materials Science
Background:
- Plasmonic nanostructures offer unique optical properties for various applications.
- T-shaped arrays present an interesting geometry for tailoring plasmonic responses.
- Effective thermal emitters and sensitive biosensors are crucial in advanced technologies.
Purpose of the Study:
- To theoretically investigate the reflection and thermal radiation properties of a T-shaped plasmonic array.
- To explore the potential of this structure as a thermal emitter and a biosensor.
- To analyze the effect of organic material infiltration on the array's optical response.
Main Methods:
- Theoretical investigation of optical properties.
- Analysis of angular dependent reflectance spectrum.
- Application of Kirchhoff's law for thermal radiation assessment.
- Simulation of T-shaped structures with varying organic material thicknesses.
Main Results:
- A clear resonant dip was observed at 0.36 eV for full polar angles.
- The structure demonstrated sharp thermal emission peaks at 3.5 microm with low sideband emission.
- Infiltration with organic materials (PMMA) caused significant shifts in resonance wavelength.
Conclusions:
- The T-shaped plasmonic array is a promising candidate for effective thermal emitters.
- The structure's sensitivity to organic material infiltration highlights its potential as a biosensor.
- The design offers tunable optical properties for specific applications.
