Band structure for a bend-core liquid crystal fiber

Palomares, Laura O.; Castro-Garay, P.; Reyes, J. Adrian
May 2009
Applied Physics Letters;5/4/2009, Vol. 94 Issue 18, p181903
Academic Journal
We study the propagation of optical fields in a cylindrical fiber of a banana bend-core liquid crystal formed by uniformly tilted coaxial cylindrical smectic layers, surrounded by vacuum. By solving numerically Maxwell’s equations, we find the band structure in both uniaxial and biaxial limits. For the biaxial case, we show that the backward propagation is restricted to certain narrow frequency band gaps, whereas for the forward one the fiber behaves similarly to a standard waveguide. We also find that the fiber modes are elliptically polarized slowly leaky modes whose attenuation coefficients are damped oscillating functions of frequency.


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