Journal
OPTICS EXPRESS
Volume 18, Issue 22, Pages 23035-23040Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.023035
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Funding
- Research Grants Council (RGC) Central Allocation [HKUST 2/07C]
- General Research Grant [412208]
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We propose a low-loss nanoscale waveguide based on gain-assisted plasmonic resonance metallic nanosphere chain. We demonstrate that by employing a gain material or even an appropriate dielectric for the host environment, waveguide loss can be reduced dramatically. A highly efficient pseudo-orthonormal basis expansion method for obtaining the complex dielectric spectra of the low-loss transmission has been developed. Eigenmode analysis revealed the physical origin of those low-loss waveguiding modes, which opens the possibility to achieve waveguiding other than using conventional dipolar resonances of individual particles. A scheme based on electron beam lithography and chemically synthesized nanoparticles has been proposed to fabricate the device. (C) 2010 Optical Society of America
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