Adiabatic and nonadiabatic nanofocusing of plasmons by tapered gap plasmon waveguides
- 24 July 2006
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 89 (4) , 041111
- https://doi.org/10.1063/1.2236219
Abstract
Adiabatic and nonadiabatic nanofocusing of plasmons in tapered gap plasmon waveguides is analyzed using the finite-difference time-domain algorithm. Optimal adaptors between two different subwavelength waveguides and conditions for maximal local field enhancement are determined, investigated, and explained on the basis of dissipative and reflective losses in the taper. Nanofocusing of plasmons into a gap of width with more than 20 times increase in the plasmon energy density is demonstrated in a silver-vacuum taper of long. Comparison with the approximate theory based on the geometrical optics approximation is conducted.
Keywords
This publication has 27 references indexed in Scilit:
- Plasmonic subwavelength waveguides: next to zero losses at sharp bendsOptics Letters, 2005
- Nanoscale Fabry–Pérot Interferometer using channel plasmon-polaritons in triangular metallic groovesApplied Physics Letters, 2005
- Single-mode subwavelength waveguide with channel plasmon-polaritons in triangular grooves on a metal surfaceApplied Physics Letters, 2004
- Low-Dimensional Optical Waves And Nano-Optical CircuitsOptics and Photonics News, 2004
- Plasmonic NanolithographyNano Letters, 2004
- Channel plasmon–polariton in a triangular groove on a metal surfaceOptics Letters, 2004
- Watching energy transferNature Materials, 2003
- Local detection of electromagnetic energy transport below the diffraction limit in metal nanoparticle plasmon waveguidesNature Materials, 2003
- Single Molecule Detection Using Surface-Enhanced Raman Scattering (SERS)Physical Review Letters, 1997
- Probing Single Molecules and Single Nanoparticles by Surface-Enhanced Raman ScatteringScience, 1997