Study of optical properties of Ag ellipsoid nanostructures by discrete dipole approximation method

Ranjbar, SAEED; Azarian, Abbas

doi:10.47176/ijpr.21.4.21178

Study of optical properties of Ag ellipsoid nanostructures by discrete dipole approximation method

Document Type : Original Article

Authors

SAEED Ranjbar ¹

Abbas Azarian ²

¹ Department of Physics, University of Qom, Qom, Iran

² Assistant Professor, Department of Physics, University of Qom, Qom, Iran

https://doi.org/10.47176/ijpr.21.4.21178

Abstract

In this paper, we investigate optical properties of silver ellipsoid nanostructures (SENs) by means of discrete dipole approximation (DDA), when these nanoparticles are embedded into the water. Absorption, scattering and extinction cross-sections of the SENs were calculated by change of incident wavelength in visible and near infrared region. Moreover, height, wavelength and full width at half maximum (FWHM) of extinction cross-section peaks (due to plasmon resonances) were studied by change of nanostructure's size and dielectric constant of medium. Our results show that, there are only two peaks of transverse dipole and longitudinal dipole modes in this spectrum.

Keywords

Ag ellipsoid nanostructures

discrete dipole approximation

plasmon

cross-sections

20.1001.1.16826957.1400.21.4.2.1

O VSalata, Nanobiotechnology 4, 2 (2004) 3.

C J Murphy, A M Gole, J W Stone, P N Sisco, A M Alkilany, E C Goldsmith, and S C Baxter, Accounts Chem. Res., 41, 12 (2008) 1721.

M Homberger and U Simon, Trans. R. Soc. Math. Phys. Eng. Sci. 368, 1915 (2010) 1405.

J Conde, J Rosa, J C Lima, and P V Baptista, J. Photoenergy 2012 (2011) 619530.

M C Daniel and D Astruc, Rev. 104, 1 (2004) 293.

M A Yurkin and A G Hoekstra, Quant. Spectrosc. Radiat. Transf 106, 1 (2007) 558.

M A Yurkin and A G.Hoekstra, Quant. Spectrosc. Radiat. Transf. 112, 13 (2011) 2234.

P J Flatau and B T Draine, Opt Soc Am. 11 (1994) 1491.

B T Draine, P J Flatau, User Guide for the discrete dipole approximation code DDSCAT 2. (2012) <http://www.arxiv.org/abs/1202.3424>.

V L Loke, M P Mengüc, and T A Nieminen, Quant. Spectrosc. Radiat. Transf. 112, 11 (2011) 1711.

R Schmehl, B M Nebeker, and E D Hirleman, Josa, 14, 11 (1997) 3026.

I Ayrancı, R Vaillon, and N Selcuk, Quant. Spectrosc. Radiat. Transf. 103 1 (2007) 83.

A L González and C Noguez, Comput. Theor. Nanosci. 4, 2 (2007) 231.

C F Bohren and D R Huffman, “Absorption and Scattering of Light by Small Particles”, John Wiley & Sons.Inc., New York, (1983).

M Wahbeh. “Discrete-Dipole-Approximation (DDA) study of the plasmon resonance in single and coupled spherical silver nanoparticles in various configurations”, Concordia University (2011).