Beam coupling in nanotube-doped nematic liquid-crystal films

Wei Lee*, Sheng Long Yeh, Chih Chao Chang, Chien Chih Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


Diffraction gratings written in films of nematic liquid crystals doped with multiwall carbon nanotubes were investigated by measurements of exponential beam-coupling coefficients. These phase gratings were induced by the interference modulation of two coherent optical beams, in conjunction with an externally applied dc field. Systematic and consistent results of the gain properties indicate that the observed coherent-beam amplification depends strongly on the pump-to-probe intensity ratio.

Original languageEnglish
Pages (from-to)791-795
Number of pages5
JournalOptics Express
Issue number13
StatePublished - 1 Jan 2001

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