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New Developments in Liquid Crystals by Georgiy V. Tkachenko, edr

By Georgiy V. Tkachenko, edr

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The transmission spectrum through infiltrated FP cavities (see Sect. 1) is shown in Fig. 18 (black dotted line) for a temperature T = 32 °C slightly lower than the LC-K15 clearing point (see Sect. 2). Due to the application of an electric field (applied tension = +/- 10 V) the FP peak blue-shifts (black dashed line), thus showing a decrease of the hole refractive index nhole. This latter effect is reversible: when switching off the electric field (applied tension = 0 V), the peak comes back to its initial location (grey dashed line).

2004). e. e. electric field perpendicular and parallel to the hole axis, respectively: see Fig. , 2007). Fig. 5. , 2007): (a) Cut view of a PhC etched through a InP/(Ga,In)(As,P)/InP planar waveguide [the GaInAsP core layer is sketched (dashed lines)]: the hole depth is d ≥ 4 μm. The white arrows indicate the orientation of the electric field for the transverse electric (TE) and magnetic (TM) polarization directions; (b) Top view of a 8-rows thick ΓΜ-oriented PhC slab (a = lattice period; D = hole diameter); (c) Top view of a Fabry-Perot cavity between two 4-rows thick ΓΜ –oriented PhC mirrors (W = cavity width).

3) for the transverse electric (TE) polarization (see Fig. e. 7 (El-Kallassi, 2009). The choice of organic molecules to fill the air holes of planar PhCs stems naturally from the following properties of organic materials: they offer a large variety of interesting optical properties both in the visible and in the near infrared spectral regions that often depend on the molecular organization; there exist a wide palette of different molecular organizations depending on the molecule interactions. g.

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