Open AccessReverse design of a bull’s eye structure based on the plasmonic far-field pattern
Author(s) -
Atsushi Yamada,
Mitsuhiro Terakawa
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.021273
Subject(s) - optics , groove (engineering) , plasmon , surface plasmon , materials science , extraordinary optical transmission , aperture (computer memory) , finite difference time domain method , wavelength , silicon , near and far field , transmission (telecommunications) , optoelectronics , surface plasmon polariton , physics , computer science , telecommunications , acoustics , metallurgy
We present a novel concept on designing a bull's eye structure for a single-wavelength optical source. The plasmonic far-field around a subwavelength aperture on a thin gold film is calculated by finite-difference time-domain method. Based on the annular field intensity distribution on the film surface, we present a method for determining a fairly optimal first groove radius and a periodicity of the grooves that show enhanced transmission. By additionally fine-tuning groove width and groove depth, we have achieved a transmission factor of 9.74. Our novel method has high potential in applications such as silicon infrared sensors.