Slab waveguide sensor based on amplified phase change due to multiple total internal reflections

Authors : Sofyan A TAYA and Taher M ELAGEZ

Pages : 67-76

Doi:10.3906/kim-1212-66

View : 20 | Download : 13

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :We present theoretically an optical slab waveguide sensor based on amplified phase change due to multiple total internal reflections insert ignore into journalissuearticles values(TIRs);. Compared with the conventional waveguide sensors, the proposed approach provides higher sensitivity. In this sensor, we adopt the change in the ellipsometric total phase change D as the measuring probe of changes in the refractive index insert ignore into journalissuearticles values(RI); of the cladding. The change in D is calculated for large number of alternating total reflections. Numerical calculations show that D is strongly dependent on the RI variations of the cladding. Moreover, theoretical simulations show that the resolution of this sensor is predicted to be \approx 10-8 refractive index units insert ignore into journalissuearticles values(RIU);. The proposed sensor could be used as a RI and a pressure sensor.
Keywords : Slab waveguides, total internal reflection, Goos Hänchen shift, ellipsometry, uniaxial anisotropic medium, vacuum sensor