ABSTRACT
We present experimental and theoretical study of the interaction of Light Induced Self-Written (LISW) waveguides in photopolymers. We show that the diffusion of the monomer controls the refractive index distribution. Consequently it influences the interaction between the LISW channels allowing the observation of anti-crossing behavior or the propagation of an array of non interacting LISW waveguides.
ABSTRACT
We present the inscription of a Light Induced Self-Written (LISW) waveguide in a 4-cyano-4'-pentylbipheny (5CB) doped photopolymer. The dynamic reorientation of the 5CB molecules in the material under applied electric field leads to birefringence in LISW waveguide and thus allows the control of the phase of the guided mode.
Subject(s)
Biphenyl Compounds/chemistry , Biphenyl Compounds/radiation effects , Molecular Imprinting/methods , Nitriles/chemistry , Nitriles/radiation effects , Refractometry/instrumentation , Surface Plasmon Resonance/instrumentation , Telecommunications/instrumentation , Electromagnetic Fields , Equipment Design , Equipment Failure Analysis , Light , Polymers/chemistry , Polymers/radiation effects , Scattering, Radiation , Surface Properties/radiation effectsABSTRACT
We perform time-resolved broadband transmission ellipsometry using the ultrafast pump-probe technique in an original setup. Our setup allows us to measure, over a wide spectral range, the optical rotary dispersion of the sample or, when needed, its circular dichroism by adding a broadband quarter-wave plate. While our experiment has been designed to study the transient states in chiral molecules, it performs sufficiently well to also characterize the ground state.
