Open AccessDesign and study of nano‐plasmonic couplers using aluminium arsenide and alumina
Author(s) -
Saber Md. Ghulam,
Sagor Rakibul Hasan
Publication year - 2015
Publication title -
iet optoelectronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.379
H-Index - 42
eISSN - 1751-8776
pISSN - 1751-8768
DOI - 10.1049/iet-opt.2014.0027
Subject(s) - aluminium , materials science , plasmon , nano , gallium arsenide , arsenide , optoelectronics , nanotechnology , composite material
A theoretical study of nano‐plasmonic couplers constructed using aluminium arsenide (AlAs) and alumina (Al 2 O 3 ) is presented. The analysis has been done using the finite difference time domain technique. The dependence of coupling efficiency on the width of the air layer of silver–air–silver waveguide has been investigated to determine the optimal width of air. Coupling efficiency with the variation in input signal wavelength, reflection coefficient and return loss have been calculated numerically in order to characterise the performance of AlAs and Al 2 O 3 as nano‐plasmonic couplers. The resonant peaks have also been obtained for both AlAs and Al 2 O 3 . The couplers provide appreciable performance at 1550 nm wavelength and have simple rectangular shape with no tapering which provides advantage in the fabrication process. It also offers broadband operation.