POLICRYPS-based electrically switchable Bragg reflector

doi:10.1364/OE.23.032696

2015-12-10

Luciano De Sio *

Nelson V. Tabiryan

Timothy J. Bunning

DOI：10.1364/OE.23.032696

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摘要

En 中文

The formation and characterization of a switchable volume reflective element fabricated from a polymer liquid crystal (LC) polymer slice (POLICRYPS) structure by holographic photopolymerization at high temperature (65 degrees C) using a photosensitive/nematic liquid crystal prepolymer mixture is reported. The submicron Bragg structure formed consists of periodic continuous polymeric walls separated by periodic LC channels. The phase separated NLC self-aligns in a homeotropic alignment between the polymer walls as indicated by polarizing optical microscopy analysis (Maltese cross). The resulting periodic grating structure results in a Bragg reflection notch upon illumination with white light due to the periodic variation in refractive index. Electro-optical experiments realized through in-plane electrodes and temperature experiments confirm that the multilayer structure acts as a Bragg mirror whose reflection efficiency can be controlled by either a small (similar to 3V/mu m) electric field or temperature. (C) 2015 Optical Society of America

Keyword:

DISPERSED LIQUID-CRYSTALS

PHOTONIC CRYSTALS

GRATINGS

FABRICATION

PHASE

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期刊

Optics Express

IF:

3.3

论文数:

6.1W

被引数:

14.3W

机构

United States Department of Defense

学者数:

2.8W

论文数: 2.3W

被引数: 172

beam engineering for advanced measurements co.

学者数:

论文数: 30

被引数: 0

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