Resonance Modulations of Surface Plasmons in Arbitrary Modified Otto and Sarid Structures

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In this paper, from the Fresnel formulas and pole expansion, we derived approximation formulas of the reflectivity and resonant split in arbitrary modified Otto and Sarid structures. In accordance with the simulation results, we conclude that the modulation sensitivity of the reflectivity versus the gap thickness is larger for a modified Otto structure with a high dielectric constant prism and gold film(or silver film). In addition, the modulation sensitivity of the reflectivity versus the electro-optic dielectric constant for a modified Sarid structure with a high dielectric constant prism and silver film is much larger than that with other prisms and metal films.
社団法人応用物理学会の論文
2000-11-15