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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1992),
  • paper CThI27

Enhanced optical nonlinear refractive index and fast response time of a composite polymer containing chloroplastin

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Abstract

Formerly, Chinese tea was served only as a drink and Chinese medicinal herbs were considered as mysterious materials of medicine. Recently, Zhang et al.1 reported their investigation of large nonlinearities of a solution of Chinese tea, herbal medicine, and chlorophyll. Lin et al.2 measured the nonlinearities of a solution of chloroplastin from fresh vegetables by using the Z-scan method with a He-Ne laser and suggested that the origin of the nonlinearities is heat. Using the quasi-cw laser at the 532-nm wavelength. He et al. observed transient multiple diffraction rings associated with self-defocusing from a Chinese tea solution in ethanol. They explain that the origin of the nonlinear refractive index is caused by reorientation and redistribution of the molecule.3 We have earlier estimated the nonlinear refractive index of natural active chlorophyll based on self-focusing.4

© 1992 Optical Society of America

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