| Autor: |
N. Gopalsami, H.-T. Chien, T. Elmer, S. Bakhtiari, A. C. Raptis, Donald O. Thompson, Dale E. Chimenti |
| Rok vydání: |
2009 |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings. |
| Popis: |
This paper investigates the use of surface plasmonic effect in slit resonators for sensing and imaging in the terahertz regime. The transmittance of electromagnetic (EM) waves through a narrow aperture becomes negligible when the aperture size becomes much smaller than the wavelength. However, with the resonant excitation of charge density waves in the metal/air interface, called the surface plasmons, an extraordinary transmittance has been observed through such apertures. Using slit resonators of 50 to 100 μm width, we have demonstrated enhanced transmission of THz radiation through the slits. The ability to concentrate the EM radiation through a sub‐wavelength aperture bodes well for detection of chemical or biological materials with high sensitivity or for super‐resolution imaging of materials for NDE. We present results of using a slit resonator for chemical detection and for super‐resolution imaging of materials for NDE. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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