slot hybrid

An on-chip Mach-Zehnder interferometer (MZI) hydrogen sensor, applying a double-slot hybrid plasmonic (DSHP) waveguide composed of a Si waveguide and two Pd disks on both sides as the sensing arm, is designed. The optical confinement factor of the sensing area can be up to 87#x0025;. For the MZI hydrogen sensor with a DSHP waveguide of 14#x2005;#x00B5;m, the sensitivity can be as high as 11 ...