Artigo Revisado por pares

A visible-near infrared tunable waveguide based on plasmonic gold nanoshell

2008; IOP Publishing; Volume: 17; Issue: 7 Linguagem: Inglês

10.1088/1674-1056/17/7/038

ISSN

2058-3834

Autores

Haixi Zhang, Ying Gu, Gong Qi-Huang,

Tópico(s)

Photonic and Optical Devices

Resumo

A tunable plasmonic waveguide via gold nanoshells immerged in a silica base is proposed and simulated by using the finite difference time-domain (FDTD) method. For waveguides based on near-field coupling, transmission frequencies can be tuned in a wide region from 660 to 900 nm in wavelength by varying shell thicknesses. After exploring the steady distributions of electric fields in these waveguides, we find that their decay lengths are about 5.948–12.83 dB/1000 nm, which is superior to the decay length (8.947 dB/1000 nm) of a gold nanosphere plasmonic waveguide. These excellent tunability and transmittability are mainly due to the unique hollow structure. These gold nanoshell waveguides should be fabricated in laboratory.

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