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|
| Type |
Poster Presentation |
| Area |
Physical Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
PHYS.P-218 |
| Subject |
Reflective color pixels using period dependent phase shifts in nanogratings |
| Authors |
Kyungmin Jung, June Sang Lee, Dong Ha Kim, Jerome Hyun*
Department of Chemistry and Nano Science, Ewha Womans University, Korea
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| Abstract |
Color pixels based on inorganic nanostructures are attracting increasing attention especially from the display industry as conventional organic color pixels have shown shortcomings in lifetime and stability. To this end, many kinds of reflective color pixels have been reported but have shown low contrast due to the bright background under bright-field illumination. Additionally, fabrication for making these filters has involved complicated and long processes. In this work, we demonstrate a one-step lithographic process for producing reflective color pixels that exhibit strong contrast. The color pixels are formed from nanogratings consisting of periodic etches in PMMA on a copper substrate. High contrast colors can be observed when the polarization of the incoming light and reflected light are oriented orthogonal to one another, and the grating is rotated 45 degrees relative to either one of the polarizations. Owing to the cross-polarized reflective mode, a dark background results which is essential for achieving high contrast pixels. The pixels show colors because of phase shifts arising from two contributions: Wood’s anomaly and formation of surface plasmonic polaritons. This enables colors to be tuned by changing the periodicity of the gratings. These results suggest intriguing possibilities for producing low-cost vivid color pixels. |
| E-mail |
wendy313@naver.com |
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121st General Meeting of the KCS