%0 Journal Article
%T Polarization analysis of an asymmetrically etched rib waveguide coupler for sensing applications
%A Malathi Sathish
%A Srinivas Talabattula
%J Photonic Sensors
%@ 2190-7439
%D 2013
%I 
%R 10.1007/s13320-013-0079-6
%X Deeply etched rib waveguides on silicon on insulator platform were not addressed well in research publications. We have analyzed single mode condition and polarization independence of a deeply etched rib waveguide (DE-RW) structure from biosensing perspective. With this rib structure, an asymmetrically etched integrated optic directional coupler has been numerically modeled to have the same coupling length for quasi-TE and TM modes. The coupling coefficients with the glucose solution as an upper cladding were calculated using a full vector mode solver, and the bulk refractive index sensitivity of the sensor was found as 28.305กม10 2/RIU for a fundamental quasi-TE mode.
%K Silicon on insulator (SOI)
%K deeply etched rib waveguide
%K asymmetrically etched
%K directional coupler
%K biosensor
%U http://link.springer.com/article/10.1007/s13320-013-0079-6