Nanooptics and photonics

Plasmonic enhancement of light to improve the parameters of solar cells
Havryliuk O.O.1, Evtukh A.A.2, Pylypova O.V.3, Semchuk O.Yu.1
1 Chuiko Institute of Surface Chemistry NAS of Ukraine. 17 Ganeral Naumova Str., Kyiv-03164, Ukraine. 
E-mail: gavrylyuk.oleksandr@gmail.com
2 V. Lashkaryov Institute of Semiconductor Physics NAS of Ukraine. 41 pr. Nauki,  Kyiv-03028, Ukraine. 
E-mail: anatoliy.evtukh@gmail.com
3 Taras Shevchenko National University of Kyiv. 60 Volodymyrska Str, Kyiv-01033, Ukraine

Surface plasmon resonance (SPR) can be generated in metal nanostructures such as gold, silver, copper and aluminium, which are promising materials in the fields of optoelectronics and plasmonics. The SPR in periodic arrays has aroused great interest because of its uniform optical properties which can be applied in integrated optoelectronics device [1]. 
The optical spectra of periodic silicon nanostructures (nanowires) with aluminum nanoparticles on their surface were calculated. The simulation was carried out using Finite-Difference Time-Domain method (FDTD).  The FDTD method is a powerful numerical algorithm for direct solution of Maxwell's equations. As a source of radiation, a plane wave with range of wavelengths 300 - 1240 nm is used. In our theoretical investigation, we use the solar spectrum AM1.5. In the simulation the following parameters of the investigated structure are used: d/P=0.8, l =2330 nm, d = 100 nm, r = 50 nm (d is the diameter of nanowires, P is the period, l is the length of nanowires, r is the radius of an aluminum nanoparticle).
On the calculated spectra of transmission, there are two minima at a wavelength of 300 and 520 nm, which may indicate the appearance of plasmon resonance at these wavelengths.

1.	Hu J., Wang C., Yang Sh., Zhou F., Li Z., Kan C.  Surface plasmon resonance in periodic hexagonal lattice arrays of silver nanodisks // Journal of Nanomaterials.-2013.-2013.-P. 1-6.