Abstract
A theoretical investigation is presented for
nematic liquid crystal photonic bandgap fibers (LCPBGFs), in which the rotation
angle of liquid crystal's director $n$ could
be arbitrarily controlled by external electric field. Based on the investigation
on the polarization effect of photonic bands, we propose two orthogonal polarization-dependent
bandgap maps to describe the mode guiding behavior. The symmetry properties
analysis of photonic band structure reveals that the bandgap map of LCPBGFs
is approximately independent of the rotation angle of director. The guiding
properties of LCPBGFs including the position and width of high transmission
windows, single-mode single-polarization or ultrahigh birefringence guiding,
confinement loss, and coupling loss are investigated. Specifically, the high
loss peaks due to the coupling between guided mode and polarization-dependent
photonic bands will greatly narrow the transmission windows of the LCPBGFs.
The polarization axis of the guided mode is determined by the rotation angle
of the director, which could be controlled by external electric field.
© 2008 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription