Subwavelength optical confinement and long propagation using grating based hybrid plasmonic waveguide with ultra-high nonlinearity

A grating based hybrid plasmonic waveguide with subwavelength optical confinement and larger propagation length is proposed. The grating assisted low-loss guiding of hybrid plasmonic-photonic mode is achieved with high nonlinearity of 18.7 × 10
⁷
km
^-1
w
^-1
. An acceptably low propagation loss of 4 dB/mm and hence a large propagation length of 1027-μm with modal area of 0.00017/μm
²
are reported.