Turkish Journal
of
Physics
phys@tubitak.gov.tr
Turkish Journal of Physics
Comparing optical sensing using slab waveguides and total internal reflection ellipsometryPhysics Department, Islamic University of Gaza,
P.O. Box 108, Gaza-PALESTINE
e-mail: staya@iugaza.edu.ps
Abstract: The sensitivity of the effective refractive index of slab waveguide sensors to variations in the refractive index of the cladding is compared to that of the ellipsometric parameters. The changes of the effective refractive index of a waveguide and the ellipsometric parameter D , due to the index change of the cladding, were derived and plotted as a function of the guiding layer thickness and with the index of the cladding. It is found that these changes almost have the same overall feature but the ellipsometric parameters showed considerable higher sensitivity than the effective index of the conventional waveguide optical sensors.
Key Words: Optical sensors, slab waveguides, sensitivity, ellipsometry
Turk. J. Phys., 35, (2011), 31-36.
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