International Journal of Optics and Photonics
IJOP
Basic Sciences
http://ijop.ir
1
admin
1735-8590
2538-4007
10.52547/ijop
1735-8590
en
jalali
1397
10
1
gregorian
2019
1
1
13
1
online
1
fulltext
en
Considerably Enhanced Second-Harmonic Generation in Resonant U-Shaped Nano-Structures
عمومى
General
پژوهشي
Research
In this paper, we perform a detailed study of the spectral response of the gold U-shaped nano-structures for different geometrical parameters and polarizations in order to obtain significant localization factor in the wavelength 1.55 μm. The obtained near-field distribution of electric fields reveals that resonances in these nano-structures correspond to the even and odd plasmonic modes depending on the geometrical parameters and polarization directions. Considerably large localization factor is obtained for the first odd mode in specific geometrical parameters. Then, this structure is considered to be surrounded by a typical second-order nonlinear dielectric. The effective susceptibility is calculated for the considered structure, using the nonlinear retrieval method, to demonstrate the enhanced second-harmonic generation quantitatively. In order to represent the applicability of the investigated structure in nano-scale light sources and frequency doublers, its second harmonic generation efficiency is compared with the efficiency of the nonlinear dielectric alone with the same dimensions. <div style="text-align: justify;"></div>
Plasmonic modes, localization factor, effective susceptibility, enhanced nonlinearity
13
22
http://ijop.ir/browse.php?a_code=A-10-124-1&slc_lang=en&sid=1
Rana
Asgari Sabet
asgarisabet@tabrizu.ac.ir
10031947532846002480
10031947532846002480
No
Research Institute for Applied Physics and Astronomy, University of Tabriz
Habib
Khoshsima
khoshsima@tabrizu.ac.ir
10031947532846002481
10031947532846002481
Yes
Research Institute for Applied Physics and Astronomy, University of Tabriz