Low loss hybrid plasmonic photonic crystal waveguide for optical communication applications

Abstract

In this paper, a new design of hybrid plasmonic photonic crystal (PhC) waveguide is proposed and analyzed at operating wavelength of 1550 nm. The suggested design consists of hybrid cylindrical core with periodic grating as a cladding region. The effective index (neff), propagation length (Lp), and normalized mode effective area (Aeff) of the supported modes are numerically investigated using full vectorial finite element method. The cladding geometry is tuned to obtain long propagation length with good field confinement. The reported plasmonic PhC with uniform grating achieves long propagation length and low propagation loss of 124 µm, and 0.035 dB/µm respectively. Further, the PhC with chirped cladding offers propagation length and low propagation loss of 162 µm, and 0.0268 dB/µm at λ = 1550 nm, respectively.

Numerical scrutiny of a silica-titania-based reverse rib waveguide with vertical and rounded sidewalls

“…This indicates that the bending losses of RRWs with rounded side walls are significantly lower than the losses suffered by RRWs with vertical side walls at R=380 μm. This analysis fosters the utilization of RRWs for designing complex optical components for on-chip communication applications [36] formed with a low-cost fabrication method. h=200 nm, W=2400 nm, d=250 nm n eff =1.5073 h=200 nm, W=3200 nm, d=250 nm n eff =1.4559 h=200 nm, W=3200 nm, d=250 nm n eff =1.4669 h=200 nm, W=3200 nm, d=250 nm n eff =1.5163…”