Full text loading...
(a) The momentum mismatch between Si waveguide and 50 nm PSW with Ag claddings is plotted as a function of wavelength and Si waveguide width. The waveguides are 340 nm tall and on a substrate. Johnson and Christy material model is used in an in-house finite-difference mode solver to extract momentum vectors. The mismatch between and is designated as and the mismatch between and is designated as .
(a) Scanning electron microscope image of an orthogonal hybrid junction platform between Si wires () and PSW with Ag claddings (w = 50 nm, L = 1 ). The device is 340 nm tall and sits on substrate. (b) The magnitude of the propagating transverse-magnetic field on the same platform at = 1550 nm obtained through 3D simulation using Lumerical software.
Comparison between experimental and theoretical bandwidth of orthogonal junction platform between Si wires () and PSW with Ag claddings (w = 50 nm, L = 400 nm). The theoretical calculation accounts for the trapezoidal waveguide sidewalls. (Inset) Theoretical bandwidth of the same platform with vertical Si waveguide sidewalls.
The power transmission through PSWs (w = 50 nm) at is plotted as a function of PSW length. The slope of the linear fit conveys information on PSW propagation loss, while the intercept at L = 0 is used to extract the coupling efficiency of the orthogonal junction.
The coupling efficiency of a single hybrid orthogonal junction (inset) is plotted as a function of wavelength. The solid and dash lines represent the calculated coupling efficiency simulated using trapezoidal and rectangular Si waveguide, respectively.
The propagation loss of air-filled PSW (w = 50 nm) with Ag claddings is plotted as a function of wavelength.
Article metrics loading...