Femtoseconds-picoseconds nonlinear optics with nearly-mm thick cholesteric liquid crystals

I. C. Khoo, Chun Wei Chen, Tsung Jui Ho, Tsung Hsien Lin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


We have succeeded in fabricating unusually thick (up to ∼ 550 microns), well aligned cholesteric liquid crystals that possess low scattering loss, large operating temperature range and well-defined photonic bandgap in the visible - near infrared regime. These CLC's possess sufficiently large ultrafast (sub-picosecond) electronic optical nonlinearity needed for direct compression, stretching and recompression of femtoseconds-picoseconds laser pulses without additional optics, as demonstrated by theory and experiments. Despite such world-record setting thickness, these CLC's are extremely compact in comparison to other state-of-the-art materials/devices used for similar operations. They are therefore highly promising for miniaturization and reduced complexity of photonic platform/systems for ultrafast pulse modulations.

Original languageEnglish (US)
Title of host publicationEmerging Liquid Crystal Technologies XII 2017
EditorsLiang-Chy Chien
ISBN (Electronic)9781510606913
StatePublished - 2017
Event2017 Emerging Liquid Crystal Technologies XII Conference, ELCT 2017 - San Francisco, United States
Duration: Jan 31 2017Feb 2 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


Other2017 Emerging Liquid Crystal Technologies XII Conference, ELCT 2017
Country/TerritoryUnited States
CitySan Francisco

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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