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We simulate spectra of the optical microcavity based on a composite (mesoporous silicon)/(nematic liquid crystal). The incident angle-dependent calculations predict the transmission peak blueshift and splitting of transverse electric and transverse magnetic polarized modes due to birefringence of both porous host material and the anisotropic filler.
Free-standing multilayer porous silicon (PS) film containing half-wave microcavity is installed into a planar glass cell and infiltrated with a nematic liquid crystal (LC) mixture E7. Here we present the results of theoretical and experimental research of the LC orientational properties and spectral characteristics of the microcavity under variable temperature and electric field applied. The reversible...
We present the design of an interference filter containing a free-standing porous silicon (PS) multilayer film with a microcavity. The estimated pore diameter is 40 - 70 nm. The PS film is installed into a planar glass cell and infiltrated with a nematic liquid crystal (LC) mixture E7. The resonant wavelength of the structure is continuously tuned using thermal dependence of the LC effective refractive...
We present the simulation results for the local director distribution of a nematic liquid crystal (NLC) confined inside cylindrical macropores of porous silicon (PS). The Frank free energy approach is used to describe the equilibrium configuration of the NLC in porous media. The influence of the molecular anchoring strength and of an externally applied electric field is investigated. Bruggeman approximation...
We present the simulated distribution of the local director of nematic liquid crystal (NLC) which is confined inside cylindrical macropores of the porous silicon. The Frank free energy approach is used to describe the NLC in porous medium. The influence of molecular anchoring strength and external electric field applied is investigated. Bruggeman approximation is used while calculating effective refractive...
In this paper, it is presented a two-sided one-dimensional photonic bandgap microstrip structure. The structure is obtained by etching a one periodic pattern of circles in the ground plane of a microstrip line and variation of the characteristic impedance as a function of the length of the microstrip line. The calculated scattering parameters of the proposed filter are presented.
Microcavity based on macroporous silicon infiltrated with liquid crystals is described theoretically using the proposed model. We use construction of electrical contacts, which allows apply electrical field perpendicularly to the pore axis. Various cases of the pore size and different pre-orientation of liquid crystal molecules are considered. Reflection spectra for two orthogonal polarizations of...
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