Electromagnetic simulation of partially covered gold nanorods

ANDRÉS A. REYNOSO; IVÁN RAMOS PÉREZ; MISAEL LEÓN HILARIO

Lima

Conferencia; PhysicsXVIII Meeting of Lima; 2019

Universidad Nacional de Ingeniería, LIMA, CONCYTEC

This work proposes several modified gold nanorods in order to tune the resonance condition of the electric field enhancement factor (EF) near the surface. The proposed geometry consists of a single gold cylinder with a fixed diameter of 360 nm and a variable length (L). Gold is deposited by using masks only at the end of the cylinder in a highly controlled manner, thus obtaining a covered part (with length C and thickness t) and a discovered part (with length D), where L=D+C. The EF has been calculated for several values of the parameters C, D and e; using the discrete dipole approximation (DDA) method and carried out by DDSCAT [1]. This study assumes a constant incident field of wavelength 633 nm from a Helium-Neon laser.