Figure 1
On-chip waveplate design and fabrication.
(a) 3D view of the polarization rotating device integrated in-line with a standard Si wire waveguide of 400 nm width and 250 nm height. (b) Polarization rotation segment integrated at the output end of a laser to generate circular polarization. (c) Cross section of the polarization rotation device. It is an asymmetric hybrid plasmonic waveguide, consisting of a Si wire waveguide, a thin SiO2 gap and a partially covering metal strip on top. (d) Scanning electron micrograph (SEM) showing the device in-line integrated with a Si wire waveguide. (e) Top view SEM of the rotation section.
