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Near-field analysis of transmission interference through unparallel nanoslits
CHEN Zhuo * #,HE Kaiting
School of Physics, Nanjing University, Nanjing 210093
*Correspondence author
#Submitted by
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Funding: Doctoral Program of Higher Education Research Fund （No.20110091120041）
Opened online: 1 December 2015
Accepted by: none
Citation: CHEN Zhuo,HE Kaiting.Near-field analysis of transmission interference through unparallel nanoslits[OL]. [ 1 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4664452
 
 
We report an experimental near-field study of the optical transmission through a thin metal film perforated by two unparallel nanoslits. Using scanning near-field optical microscopy (SNOM), periodic transmission patterns on slits are directly observed. The wavelength, generation-conversion efficiency, and intrinsic phase factor of surface plasmon polaritons (SPPs) at a fixed incident wavelength of 785 nm are inferred by fitting the experimental results with a simple analytical model, through which the role of propagating SPPs in the oscillatory transmission intensity is clearly evidenced. In addition, the visibility of interference pattern can be further improved by replacing one single slit with a slit array.
Keywords:Optics; Surface plasmons; transmission interference; unparallel nanoslits
 
 
 

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