Polymer planar waveguide device using inverted channel structure with upper liquid crystal cladding.
We propose a composite waveguide configuration based on an inverted polymer channel structure with upper nematic liquid crystal cladding. This configuration can achieve a more homogenous liquid crystal molecular alignment between the core and the liquid crystal material by minimizing the rubbing damage during preparation of the alignment layer. We demonstrated our idea with a variable optical attenuator which exhibited a 24 dB of attenuation range over a tuning peak voltage of 10 V at 1550 nm.
Xu
Y
Y
Department of Electronic Engineering, City University of Hong Kong, Hong Kong.
Uddin
M A
MA
Chung
P S
PS
Chan
H P
HP