Enhanced optical nonlinearity near the photonic bandgap edges of a cholesteric liquid crystal |
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| Authors: | Hwang Jisoo Ha N Y Chang H J Park Byoungchoo Wu J W |
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| Institution: | Department of Physics, Ewha Womans University, Seoul 120-750, South Korea. |
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| Abstract: | The third-order Kerr nonlinear optical effect of a one-dimensional photonic bandgap structure of a cholesteric liquid crystal is investigated. In a femtosecond nonlinear transmission measurement, nonlinear optical changes in the bandgap edges are observed. From analysis of the dispersion relation, Kerr nonlinear coefficients of nematics, forming the cholesteric liquid crystal, are found to be enhanced by 1-2 orders of magnitude through the photonic bandgap structure. |
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