A Hybrid-Plasmonic-Waveguide-Based Polarization-Independent Directional Coupler

Transmission Characteristics Analysis Of a Directional Coupler Based on Hybrid SNIMS Plasmonic Waveguide

We numerically simulate a directional coupler based on hybrid SNIMS (semiconductor-nanowire-insulator-metal strip) plasmonic waveguide using COMSOL. The distributions of electromagnetic field and longitudinal energy flux density when only fundamental mode propagates in waveguides are analyzed. The dependences of coupling length and maximum transfer power on the distance of two parallel waveguid...

A Polarization Independent Optical Directional Coupler Based on Slot Waveguides

Low loss coupler to interface silicon waveguide and hybrid plasmonic waveguide

A metallic coupler is proposed to interface a silicon on insulator (SOI) waveguide with a narrow hybrid plasmonic waveguide (200× 200 nm). The device operation is investigated and optimized to attain the best tradeoff between the mode confinement and the propagation loss. Calculations reveal that a high confinement and low loss of the energy is achieved from a silicon slab waveguide into the di...

Polarization-independent optical directional coupler based on slot waveguides.

A polarization-independent optical directional coupler based on slot waveguides is proposed and analyzed by using rigorous full-vectorial analysis methods based on a finite-element scheme. Properly choosing materials and structural parameters makes the coupling length for quasi-TE modes become equal to that for quasi-TM modes. Tolerances to operating wavelength and structural parameters are als...

Ultra-Compact Directional Coupler Using Hybrid Plasmonic Waveguide with Dual Metallic Layers

We analyze hybrid plasmonic waveguides with metallic layers on two sides. Confinement of closely stacked metal induces large difference of effective indices of vertical even and odd modes. This phenomenon can be utilized as ultracompact vertical directional coupler. Simulation shows directional coupling can be achieved in less than 1 μm.