Optical characteristics of nanocomposite materials have been modeled depends on materials of the nanoparticles and the matrix, the size and shape of nanoparticles. The optical constants of diamond-like carbon films doped with nanoparticles of silver are considered within the framework of the effective theory of Maxwell—Garnett. It is shown that the concentration, size, shape of nanoparticles and the interaction between them affect the value of the complex effective refractive index of the nanocomposite and are crucial for provision of maximum absorption peak (plasmon peak) and the width of the absorption spectrum. The modeling of the optical properties of the diamond-like carbon film doped by silver nanoparticles with spheroidal shape was provided. In this case the plasmon peaks are shifted to longer wavelengths and broadened. In addition, additionale absorption peaks appear.
It is demonstrate that renormalized Maxwell—Garnett effective theory, which includes size effect and near field interaction between nanoparticles, can be successfully applied to describe the optical properties of silver diamond-like carbon nanocomposite films with the high concentration of Ag nanoparticles. The obtained results suggest as well that a random mixture consisting of a diamond-like carbon film with embedded isolated silver inclusions is promising material for the fabrication of tunable nanocomposites that could used in different optical systems employing surface plasmon resonance.
1. Ajayan, P. M., Schadler, L. S., Braun, P. V (2003). Nanocomposite Science and Technology, Wiley-VCH Verlag GmbH Co, Weinheim. 2. Berini, P. (2014), “Surface plasmon photodetectors and their applications”, Laser & Photonics Reviews, vol. 8, no. 2, pp. 197–220. 3. Robertson, J. (2002), “Diamond like amorphous carbon”, Sci. Eng. R-Rep., vol. 37, pp. 129–281. 4. Podgornika, B., Vižintin, J., Jacobson, S., Hogmar, S. (2006), “Tribological behaviour of WC/C coatings operating under different lubrication regimes”, Wear, no 261, pp. 32–40. 5. Yaremchuk, I., Tamulevičienė, A., Tamulevičius, T., Šlapikas, K., Balevičius, Z., Tamulevičius, S., (2014), “Modeling of the plasmonic properties of DLC-Ag nanocomposite films”, Physica status solidi (a), vol. 21, no 2, pp. 329–335. 6. Tritsaris, G.A,. Mathioudakis, C., Kelires, P.C., Kaxiras, E., (2012), “Optical and elastic properties of iamond-like carbon with metallic inclusions: A theoretical study”, Journal of Applied Physics, voll. 112, pp. 103503-1 — 103503-6. 7. Maxwell, G., (1906), “Colours in metal glasses, in metallic films, and in metallic solutions. II”, Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Characterю, pp. 237–288. 8. Stroud, D., (1998), “The effective medium approximations: Some recent developments”, Superlattices and microstructures, vol. 23, no 3, pp. 567— 573. 9. Ruppin, R., (2000), “Evaluation of extended Maxwell-Garnett theories” Optics Communications, vol. 182, no 4, pp. 273–279. 10. Barrera, R.G., Monsivais, G., Mochán, W.L. (1988) “Renormalized polarizability in the Maxwell Garnett theory”, Physical Review B, vol. 38, no. 8, pp. 5371–5377. 11. Khlebtsov, N.G., (2008), “Optics and biophotonics of nanoparticles with a plasmon resonance”, Kvantovaya. Electroika, vol. 38. no 6, pp. 504–529. 12. Treacy, M.M.J., (2002), “Dynamical diffraction explanation of the anomalous transmission of light through metallic gratings” Physical Review B, vol. 66, no 19, pp. 195105–19109. 13. Johnson, P.B., Christy, R-W., (1972), “Optical constants of the noble metals”, Physical review B, vol. 6, no 12, pp. 4370–4379. 14. Berger, A., (1993), “Prolate silver particles in glass surfaces”, Journal of non-crystalline solids, vol. 163, no 2, pp. 185–194. 15. Meškinis, Š., Čiegis, A., Vasiliauskas, A., Šlapikas, K., Gudaitis, R., Yaremchuk, I., Fitio, V., Bobitski, Y., Tamulevičius, S., (2015), “Annealing Effects on Structure and Optical Properties of Diamond-Like Carbon Films Containing Silver”, Nanoscale Research Letters, vol. 11, no 146, pp. 1–9. 16. Bohren, C. F., (1983), Absorption and scattering of light by small particles, Wiley, New York.