Electrical tuning of three-dimensional photonic crystals using polymer dispersed liquid crystals

2005 ◽  
Vol 86 (5) ◽  
pp. 051103 ◽  
Author(s):  
Dennis McPhail ◽  
Martin Straub ◽  
Min Gu
Keyword(s):  
Liquid Crystals ◽  
Photonic Crystals ◽  
Three Dimensional ◽  
Polymer Dispersed Liquid Crystals ◽  
Polymer Dispersed

Polymer Dispersed Liquid Crystals as Mesoscale 2D and 3D Lattices

2001 ◽  
Vol 694 ◽  
Author(s):  
Michael J. Escuti ◽  
Gregory P. Crawford
Keyword(s):  
Liquid Crystals ◽  
Three Dimensional ◽  
Polymer Morphology ◽  
Dynamic Switching ◽  
Bragg Regime ◽  
Multiple Dimensions ◽  
Polymer Dispersed Liquid Crystals ◽  
Polymer Dispersed ◽  
Almost All ◽  
2D And 3D

AbstractWe introduce and explore two- and three-dimensional lattices formed in Holographic-Polymer Dispersed Liquid Crystals (H-PDLC) materials, which exhibit an electrically controllable index modulation in multiple dimensions. As electro-optically active holograms, these materials exhibit fast dynamic switching phenomena (~100 microseconds), and are simple to fabricate. While many applications have been proposed for these materials, almost all are based on one-dimensional index modulations in various grating regimes. However, constraints in additional dimensions lead to a much greater sensitivity of the polymer morphology to monomer functionality, exposure irradiance, and grating pitch. In an effort to begin to understand this relationship, two-dimensional triangle lattices were created using two monomeric blends exposed over a range of powers. Final diffraction efficiency (Bragg regime), saturation voltage, and polymer morphology were examined from the resulting triangle lattices. Three- dimensional lattices are discussed and a six-beam holographic method is proposed. Photonic crystal applications are envisioned where the pseudo-bandgap can be electrically controlled.

Polymer Dispersed Liquid Crystals as Mesoscale 2D and 3D Lattices

2001 ◽  
Vol 709 ◽  
Author(s):  
Michael J. Escuti ◽  
Gregory P. Crawford
Keyword(s):  
Liquid Crystals ◽  
Three Dimensional ◽  
Polymer Morphology ◽  
Dynamic Switching ◽  
Bragg Regime ◽  
Multiple Dimensions ◽  
Polymer Dispersed Liquid Crystals ◽  
Polymer Dispersed ◽  
Almost All ◽  
2D And 3D

ABSTRACTWe introduce and explore two- and three-dimensional lattices formed in Holographic-Polymer Dispersed Liquid Crystals (H-PDLC) materials, which exhibit an electrically controllable index modulation in multiple dimensions. As electro-optically active holograms, these materials exhibit fast dynamic switching phenomena (~100 microseconds), and are simple to fabricate. While many applications have been proposed for these materials, almost all are based on one-dimensional index modulations in various grating regimes. However, constraints in additional dimensions lead to a much greater sensitivity of the polymer morphology to monomer functionality, exposure irradiance, and grating pitch. In an effort to begin to understand this relationship, two-dimensional triangle lattices were created using two monomeric blends exposed over a range of powers. Final diffraction efficiency (Bragg regime), saturation voltage, and polymer morphology were examined from the resulting triangle lattices. Three-dimensional lattices are discussed and a six-beam holographic method is proposed. Photonic crystal applications are envisioned where the pseudo-bandgap can be electrically controlled.

Holographic polymer-dispersed liquid crystals and polymeric photonic crystals formed by holographic photolithography

2006 ◽  
Vol 14 (2) ◽  
pp. 155-165 ◽  
Author(s):  
Thein Kyu ◽  
Scott Meng ◽  
Hatice Duran ◽  
Kumar Nanjundiah ◽  
Gregory R. Yandek
Keyword(s):  
Liquid Crystals ◽  
Photonic Crystals ◽  
Polymer Dispersed Liquid Crystals ◽  
Polymer Dispersed

Optical and electro-optical properties of photonic crystals based on polymer-dispersed liquid crystals

2010 ◽  
Vol 101 (1-2) ◽  
pp. 245-252 ◽  
Author(s):  
M.-S. Li ◽  
S.-Y. Huang ◽  
S.-T. Wu ◽  
H.-C. Lin ◽  
A. Y.-G. Fuh
Keyword(s):  
Optical Properties ◽  
Liquid Crystals ◽  
Photonic Crystals ◽  
Polymer Dispersed Liquid Crystals ◽  
Polymer Dispersed
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