CIOP   05384
CENTRO DE INVESTIGACIONES OPTICAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Study of High Harmonics Generation (HHG) employing field enhancement by mean of metallic nanostructures
Autor/es:
E.NEYRA; F.VIDELA; G.A. TORCHIA
Lugar:
La Habana
Reunión:
Conferencia; International Conference on Optics, Photonics and Photosciences; 2014
Institución organizadora:
ICTP-ICO
Resumen:
In
the last years a great interest have been devoted to HHG founded in their
broaden possibilities of application because it constitutes a unique source of
coherent radiation in the XUV-XSoft Ray spectral range. Likewise, part of this
radiation fall in the window water, and also it can generate attosecond ultra-short
pulses, allowing studying natural processes occurring in this temporal scale. It can be mentioned, as a novelty in the
state of art, that field enhancement has been reported (Kim, S. et al, Nature,
2008) opening a new study field in the area although not free of controversy (M.
Silvis. et al, Nature 2013).
We
present a preliminary theoretical study of high harmonic generation in Argon
gas introducing the effect of field
enhancement achieved employing metallic nanostructures excited by a femtosecond laser whose wavelength is 800
nm.
Taken
into account that the achievable enhancement strongly depends on shape geometry
an array of bow ties nanostructures was used. The near field resulting after
irradiation was simulated by mean of the commercial software RSoft. Applying the
Newton equations in the semi-classical three step model and the Time Dependence
Schrödinger Equation (TDSE) considering only one dimension, we were able to
predict the spectrum of the harmonics and its cut-off energy. We also will
explore different noble metals in the available nanostructures such as silver,
gold, copper and others. The main features will be analyzed and discussed in
order to get knowledge in the HHG process considering the effect given by the
nanostructures.