Journal
APPLIED OPTICS
Volume 56, Issue 20, Pages 5731-5735Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.56.005731
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Funding
- LG Display
- National Research Foundation of Korea (NRF) [2016R1A2B4010361]
- Brain Korea 21 Plus
- National Research Foundation of Korea [2016R1A2B4010361] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We report a method of broadening the reflection bandwidth of polymer-stabilized cholesteric liquid crystal (PSCLC). The top substrate was consecutively coated with a polyimide (PI) and a reactive mesogen (RM) layer, while the bottom substrate was coated with only PI. We exposed the top substrate with the RM coating to UV light. The reflection bandwidth of the PSCLC samples where the top substrate was over-coated with RM was significantly broader than the samples where both substrates were coated with PI. In addition to the effect of the UV intensity gradient, the RM-coated top substrate has a chemical affinity to bulk RM, promoting formation of the pitch gradient and broadening the reflection bandwidth in the sample. (C) 2017 Optical Society of America.
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