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Liquid crystal based nonlinear fishnet metamaterials
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) Schematic of the LC infiltrated fishnet metamaterial. (b) Scanning electron microscope image (top view) of the fabricated fishnet metamaterials. (c) Side view of the LC cell: DL is a dielectric layer, S—100 μm thick plastic spacers. Parameters for the fabricated Au-MgF2-Au fishnet are h d  = hm  = 50 nm, a = 190 nm, b = 350 nm, and c = 600 nm.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Experimental setup for the transmission spectral measurement of the fishnet metamaterial, where AP is an aperture, BS—beam splitter, S—fishnet sample, P—polarizer, OSA—optical spectrum analyzer, and M1, M2—microscope objectives. (b) Measurement of linear transmission of the LC cell, including Au-MgF2-Au fishnet metamaterials. Solid lines—experimental results; dashed lines—numerical simulations. (i) empty structure; (ii) the structure fully infiltrated with E7 nematic liquid crystal.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Experimental setup for nonlinear transmissions measurement at 1550 nm. A—attenuator, PD1, PD2—photodiode detectors, P—polarizer, BS1, BS2—beam splitters, and M1, M2—microscope objectives. (b) Measured transmission at 1550 nm vs. input power for two bias voltages 0 V and 40 V. Dashed line—linear dependence. Inset: Normalized transmission vs. incident laser power.


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Scitation: Liquid crystal based nonlinear fishnet metamaterials