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year 28, Issue 2 (ICOP & ICPET 2022 2022)
ICOP & ICPET _ INPC _ ICOFS 2022, 28(2): 666-669 |
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Simiari M, Sepehri Javan N, kheiandish A. Analytical study of Optical properties of Metallic nanoparticle dimer in the dipole approximation. ICOP & ICPET _ INPC _ ICOFS 2022; 28 (2) :666-669
URL: http://opsi.ir/article-1-2624-en.html
URL: http://opsi.ir/article-1-2624-en.html
Abstract: (860 Views)
In this study, using a modified Drude model, in the dipole approximation, we have analytically investigated the optical properties of spherical gold nanoparticle dimer in the interaction with a laser beam whose polarization is parallel to the orientation of the dimer. Effect of the nanoparticles interaction on the extinction efficiency is studied and it is shown that the interparticle interaction causes an increase in the extinction efficiency and the red-shift of the plasmon resonance wavelength area. Complex permittivity of the gold nanoparticle dimer is presented for different values of nanoparticles separation. Comparing with an individual nanoparticle, it is noticed that the interaction of nanoparticles leads to the decrease in the absolute value of the real part of the permittivity and decrease in its imaginary part as well. Finally, it is shown that a cubic or an exponential relation with respect to the radius separation of nanoparticles can be fitted for the displacement of plasmon resonance wavelength.
Type of Study: Experimental |
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