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(Color online) Illustration of (a) the device configuration and (b) the change of the optical indicatrix with an applied electric field.
(Color online) Photograph of the short pitch polymer-stabilized chiral nematic liquid crystal between crossed polarizers for an electric field strength of E = 14 V/µm with a bipolar square wave at a frequency of 1 kHz. The grating period is Λ = 13 μm. A plot of the intensity profile is also shown.
(Color online) Photographs of the far-field diffraction pattern for different electric field strengths of a bipolar square wave with a frequency of 1 kHz. (a) E = 0 V/µm, (b) E = 7 V/µm, (c) E = 14 V/µm, and (d) E = 29 V/µm. (e) The intensity profile of the diffraction pattern for E = 29 V/µm. The incident laser wavelength was λ = 632.8 nm and the results are for an input polarization that is parallel to the E-field direction.
A plot of the ratio In /I Total (the intensity of the nth diffraction order/the total intensity of the zeroth order for E = 0 V/µm) as a function of the electric field strength. Three orders are shown: zeroth (squares), +1st (circles), and +2nd (triangles) orders. The inset corresponds to the theoretical results obtained using the expressions provided in Eqs. (1) and (2).
Response times of the diffraction grating to an isolated bipolar pulse train as a function of the electric field strength. Rise times (squares) and fall times (circles).
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