Use of a near-field optical probe to locally launch surface plasmon polaritons on plasmonic waveguides: A study by the finite difference time domain method

2004 ◽  
Vol 64 (5-6) ◽  
pp. 453-458 ◽  
Author(s):  
B.S. Hwang ◽  
M.H. Kwon ◽  
Jeongyong Kim
Keyword(s):  
Finite Difference ◽  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Near Field ◽  
Optical Probe ◽  
Plasmonic Waveguides ◽  
Difference Time ◽  
Plasmon Polaritons

Three-Dimensional Finite-Difference Time-Domain Method Modeling of Nanowire Optical Probe

2014 ◽  
Vol 602-605 ◽  
pp. 3359-3362
Author(s):  
Chun Li Zhu ◽  
Jing Li
Keyword(s):  
Finite Difference ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Incident Light ◽  
Near Field ◽  
Three Dimensional ◽  
Polarization Direction ◽  
Near Field Imaging ◽  
Difference Time ◽  
Field Imaging

In this paper, output near fields of nanowires with different optical and structure configurations are calculated by using the three-dimensional finite-difference time-domain (3D FDTD) method. Then a nanowire with suitable near field distribution is chosen as the probe for scanning dielectric and metal nanogratings. Scanning results show that the resolution in near-field imaging of dielectric nanogratings can be as low as 80nm, and the imaging results are greatly influenced by the polarization direction of the incident light. Compared with dielectric nanogratings, metal nanogratings have significantly enhanced resolutions when the arrangement of gratings is perpendicular to the polarization direction of the incident light due to the enhancement effect of the localized surface plasmons (SPs). Results presented here could offer valuable references for practical applications in near-field imaging with nanowires as optical probes.

Localized Surface Plasmon Resonance of Single Silver Nano-Hemisphere

2013 ◽  
Vol 818 ◽  
pp. 137-140
Author(s):  
Rui Li ◽  
Kun Liu ◽  
Shi Pan ◽  
Jian Hua Ding
Keyword(s):  
Surface Plasmon Resonance ◽  
Finite Difference ◽  
Surface Plasmon ◽  
Time Domain ◽  
Plasmon Resonance ◽  
Finite Difference Time Domain ◽  
Localized Surface Plasmon Resonance ◽  
Resonance Effect ◽  
Localized Surface Plasmon ◽  
Difference Time

In this work, we use 3D finite difference time domain (3D-FDTD) to calculate the plasmon resonance effect for a single silver hemisphere in which the palsmon line shape have distinct peaks when the particles are located on a glass substrate. The dependence of the resonance on hemisphere size and the ratio of height over radius are characterized, and it is found that the surface interface effect played an important role on the plasman resonace effect for a single silver hemisphere.

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