Electrically switchable mesoscale Penrose quasicrystal structure

Gorkhali, Suraj P.; Qi, Jun; Crawford, Gregory P.
January 2005
Applied Physics Letters;1/3/2005, Vol. 86 Issue 1, p011110
Academic Journal
We present the design, fabrication, and electro-optical properties of a switchable Penrose quasicrystal configuration in holographic polymer dispersed liquid crystal (H-PDLC) materials using a 5-beam hololithography exposure technique. The Penrose quasicrystal structure is confirmed through diffraction patterns and scanning electron microscopy (SEM); both show the expected tenfold symmetry. We also present electro-optic switching parameters of this quasicrystal structure and determine its index modulation to be 3×10-3 using coupled wave theory.


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