Study of radiative losses of terahertz surface plasmons on plane metal-dielectric interfaces
- Resource Type
- Conference
- Authors
- Gerasimov, Vasily V.; Knyazev, Boris A.; Lemzyakov, Alexey G.; Nikitin, Alexey K.
- Source
- 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz) Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on. :1-2 Aug, 2015
- Subject
- Communication, Networking and Broadcast Technologies
Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
Photonics and Electrooptics
Optical surface waves
Surface waves
Rough surfaces
Surface roughness
Gold
Surface treatment
- Language
- ISSN
- 2162-2027
2162-2035
Radiative losses of terahertz surface plasmons (SPs) on plane metal-dielectric interfaces have been studied. Experiments performed with “gold — zinc sulfate — air” plane structures at a 130 μm wavelength have shown that a thin-film dielectric coating of the metal of about λ/500 thickness could double the SP propagation length. In addition, an optimal dielectric layer thickness corresponding to the minimum total SPs energy loss has been found. Experiments with two sets of samples of different quality of preparation combined with atomic force microscopy surface characterization demonstrated the influence of surface structure (roughness, grain, layer thickness uniformity) on the propagation length and optimal dielectric layer thickness.