We demonstrate an electrically tunable binary retarder (ETBR) with a self-aligned liquid crystal (LC) on an anisotropic polymer film produced by photo-assisted imprinting. The ETBR has two parts: a tunable optical layer of an LC and a static optical layer of an imprinted anisotropic polymer film possessing two different in-plane optic axes. The anisotropic polymer film was produced using reactive mesogens spontaneously aligned along the topographic microgrooves by imprinting under the exposure of ultraviolet light. An electrically tunable hybrid wave plate, whose phase retardation varies from a quarter to a half-wave, is constructed using the self-aligned LC layer on the imprinted polymer film that behaves as a quarter wave plate with two alternating optic axes. This approach can be used to design a new class of tunable optical devices with multiple in-plane optic axes.
© 2013 Optical Society of America
Original Manuscript: January 16, 2013
Revised Manuscript: February 18, 2013
Manuscript Accepted: February 18, 2013
Published: March 8, 2013
Jiyoon Kim, Yong-Woon Lim, Jun-Hee Na, and Sin-Doo Lee, "Tunable binary retarder using self-aligned liquid crystal on anisotropic polymer film by photo-assisted imprinting," Appl. Opt. 52, 1752-1757 (2013)