TITLE

Conditions to cancel the laser polarization dependence of a subwavelength tip

AUTHOR(S)
Houard, J.; Vella, A.; Vurpillot, F.; Deconihout, B.
PUB. DATE
March 2009
SOURCE
Applied Physics Letters;3/23/2009, Vol. 94 Issue 12, p121905
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Using laser assisted atom probe tomography, we investigate the polarization dependence of the absorption coefficient of a subwavelength Al tip illuminated by an ultrashort laser pulse. In practice, we find an equilibrium condition as a function of the incident wavelength for which the atom evaporation rate becomes independent of the wave polarization. It is experimentally shown that this condition only depends on the ratio between the tip radius and the laser wavelength. Furthermore, our calculations demonstrate that a transverse local plasmon polariton mode can be resonantly excited at the tip apex.
ACCESSION #
37259597

 

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