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.
Department of Electronic Engineering, City University of Hong Kong, Hong Kong.
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Y
Xu
M A
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Uddin
P S
PS
Chung
H P
HP
Chan