NLC-CLC-NLC cell as an electrically tunable polarization plane rotator |
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Authors: | A H Gevorgyan and K B Oganesyan |
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Institution: | 1.Yerevan State University,Yerevan,Armenia;2.Alikhanian Yerevan Physics Institute,Yerevan,Armenia |
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Abstract: | A liquid crystal optical device made of an optically anisotropic heterostructure is considered. The device consists of a cholesteric
liquid crystal (CLC) layer sandwiched by two phase-shifting anisotropic layers of a nematic liquid crystal (NLC). In this
structure each of the NLC layers is a quarterwave plate. The problem is solved both by Ambartsumian’s method of layer addition
and Muller’s matrix method. The peculiarities of reflection spectra, eigen polarizations, rotation of polarization plane and
polarization ellipticity are studied. It is shown that this device can work as a light modulator or a system for obtaining
linearly polarized light with electrically tunable rotation of the polarization plane (which is especially important for optical
communication), as well as a device for obtaining the linearly polarized light from a non-polarized one. |
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