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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

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[Surface plasmon resonance sensor working at terahertz frequency].

Hui Feng¹, Li Wang

¹Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China. fenghui@aphy.iphy.ac.cn

Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu

|October 20, 2011

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This study compares optical and terahertz frequency surface plasmon resonance sensors (SPRS). Terahertz-SPRS simplifies dielectric constant determination, offering a valuable bio-sensing method.

Area of Science:

Physics
Spectroscopy
Nanotechnology

Context:

Surface Plasmon Resonance Sensors (SPRS) are crucial for material analysis.
Terahertz (THz) technology is increasingly vital in biological and medical applications.

Purpose:

To analyze a terahertz-frequency surface plasmon resonance sensor (THz-SPRS) with angular modulation.
To compare THz-SPRS with traditional optical SPRS.

Summary:

Unlike optical SPRS which shows a reflection dip, THz-SPRS exhibits an enhanced reflection peak.
The peak position in THz-SPRS depends only on refractive indices, not metal film properties.
This simplifies determining a sample's dielectric constant compared to optical methods.

Impact:

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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

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The THz-SPRS device offers a simplified method for dielectric constant determination.
This technology presents a valuable approach for bio-sensing and analysis in the biological and medical fields.