Relaxation dynamics of NLO crosslinked polyurethane with hemicyanine-type chromophore

Kwang Sup Lee, Hang Young Woo, Ki Jeong Moon, Hong Ku Shim, Miyun Jeong, Tong Kun Lim

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


The crosslinked polyurethane PU-W was prepared by the reaction of poly[(phenylisocyanate)-co-formaldehyde] and hydroxy-functionalized hemicyanine-type NLO chromophore. For the poled and cured polymer the χ(2) value was 30.2 pm/V measured at a wavelength of 1.064 μm. Thermal stability studies performed on PU-PV sample by the second harmonic generation activity indicated a nearly no decay of χ(2) value due to the lattice hardening of the polyurethane matrix with three bonding sites. The relaxation behaviors of aligned dipoles in PU-PV were also studied by varying poling and crosslinking conditions.

Original languageEnglish
Pages (from-to)47-52
Number of pages6
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Publication statusPublished - 1998
Externally publishedYes
EventProceedings of the 1998 IEEE Instrumentation and Measurement Technology Conference, IMTC. Part 1 (of 2) - St.Paul, MN, USA
Duration: 1998 May 181998 May 21


  • Crosslinked polyurethane
  • Nonlinearity
  • Relaxation dynamics

ASJC Scopus subject areas

  • Condensed Matter Physics


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