Gyrotropic band gap optical sensors
Document Type
Article
Publication Date
6-2-2010
Abstract
Faraday-effect-active photonic band gap structures fabricated in iron garnet films are shown to provide a platform for optical sensing based on refractive index detection. Strong near-band gap-edge polarization rotations serve as a sensitive probe to cover-index changes in birefringent magneto-optic waveguides. A wide index range from air to n=1.6 is explored. Device sensitivity is found to improve with cover index increase. Theoretical analysis of Bloch modes polarization state shows large near stop-band edge rotations and strong sensitivity to cover index. The combined effects of geometrical waveguide birefringence and Faraday rotation contribute to the strength of the sensor response. © 2010 American Institute of Physics.
Publication Title
Applied Physics Letters
Recommended Citation
Dissanayake, N.,
Levy, M.,
Jalali, A.,
&
Fratello, V.
(2010).
Gyrotropic band gap optical sensors.
Applied Physics Letters,
96(18).
http://doi.org/10.1063/1.3427404
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/8900
