Interaction of electromagnetic wave with sub-wavelength structures: plasmon waveguide

Władysław M. Saj

doi:10.1117/12.639048

6 December 2006 Interaction of electromagnetic wave with sub-wavelength structures: plasmon waveguide

Władysław M. Saj

Proceedings Volume 5945, 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 59451P (2006) https://doi.org/10.1117/12.639048
Event: 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2005, Nitra, Slovakia

Abstract

We propose two dimensional waveguide composed of silver rods in hexagonal lattice where coupling of surface plasmons is responsible for transport of energy. We examine guiding properties of this structure for lattice constant 200 nm, diameter of rods 100 nm and wavelength λ = 500 nm using Finite Difference Time Domain method. Electromagnetic wave is guided for transverse magnetic mode (light polarized perpendiculary to rods). Estimated attenuation factor is a = 5.63 dB/μm and group velocity of the signal is v_g=0.86 c. Interference pattern observed along the waveguide can be explained as standing wave created by reflection from edge of the structure. From period of this standing wave we calculate that phase velocity is v_p = (6.4 ± 0.1) c. Transverse electric mode when light is polarized parallel to rods is not guided in the structure.

Citation Download Citation

Władysław M. Saj "Interaction of electromagnetic wave with sub-wavelength structures: plasmon waveguide", Proc. SPIE 5945, 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 59451P (6 December 2006); https://doi.org/10.1117/12.639048

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