Geometry optimization of plasmonic nanoantennas for organic solar cells

It is known that insertion of periodic cylindrical silver nanoantennas in organic thin-film solar cells increases efficiency of light absorption. In this study, we perform a geometric optimization of the nanoantennas by using genetic algorithm. Numerical calculations are based on the method of finite elements. Four types of new nanoantennas with different geometrical parameters were considered, namely, conical antenna, trunk of conical, trunk of conical exponential 1 and 2 ones. We have found that the trunk conical exponential 2 antenna provide a better solution for different angle of light incidence as compared with the others.