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Direct observation of surface plasmon far field for regular surface ripple formation by femtosecond laser pulse irradiation of gold nanostructures on silicon substrates
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We have directly observed the interference ripple pattern between surface plasmon far field by gold nanosphere and the incident laser on silicon substrate. We explained the ripple formation using three-dimensional finite-difference time-domain simulation method. Nanosphere is an origin for regular ripple formation due to Mie scattering. We present a new method to control the plasmonic far-field pattern using an arbitrary gold nanostructure on the silicon substrate. Previously, the formed ripples were not regular but wavy because they were formed incoherently through the self organization process originating from the random surface roughness. The ripple structure was well controlled coherently.
Title: Direct observation of surface plasmon far field for regular surface ripple formation by femtosecond laser pulse irradiation of gold nanostructures on silicon substrates
Description:
We have directly observed the interference ripple pattern between surface plasmon far field by gold nanosphere and the incident laser on silicon substrate.
We explained the ripple formation using three-dimensional finite-difference time-domain simulation method.
Nanosphere is an origin for regular ripple formation due to Mie scattering.
We present a new method to control the plasmonic far-field pattern using an arbitrary gold nanostructure on the silicon substrate.
Previously, the formed ripples were not regular but wavy because they were formed incoherently through the self organization process originating from the random surface roughness.
The ripple structure was well controlled coherently.
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