Effects of the surface relief profile on liquid crystal aligning capabilities of laser-induced periodic surface structures
- Authors
- Lee, Jong Jin; Oh, Cha Hwan; Lee, Geon Joon; Lee, YoungPak; Paek, Sang Hyon
- Issue Date
- Sep-2006
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- liquid crystal alignment; surface relief grating; anchoring energy
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.49, no.3, pp.894 - 898
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 49
- Number
- 3
- Start Page
- 894
- End Page
- 898
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/181036
- ISSN
- 0374-4884
- Abstract
- The effect of the surface-relief profile on the liquid crystal (LC) alignment was studied using surface-relief gratings (SRGs) that were created on photo-resist (PR) films by holographic lithography. By measuring the anchoring energies of the LC molecules for various surface-relief profiles, we found that the LC molecules on the SRG-patterned PR (SRG-PPR) substrate had a large anchoring energy for a short SRG period and/or a large SRG depth. The anchoring energy of LC molecules on the SRG-PPR substrate was obtained from the analyzer-angle-dependent transmittance of the [Rubbed PI/LC/SRG-PPR] type, 90 degrees-twisted nematic liquid crystal (TNLC) cell prepared using a rubbed polyimide substrate and an SRG-PPR substrate with one of four different SRG periods (or an SRG-PPR substrate with one of three different SRG depths) as the front and the back alignment layers.
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