Nonlinear optical properties of modified DR1/silica films with highly ordered structures

Young Sun Cho, Kyung Shin Min, Jae Suk Lee, Gyoujin Cho, Kyeong Taek Jung, Yong Gun Shul, Tatsuo Wada, Hiroyuki Sasabe

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Crosslinkable organic NLO chromophore (DRS) has been prepared and chemically incorporated into silica matrices using a sol-gel process. By monitoring the decay of UV absorbance as a function of time and temperatures, a number of electrically poled DRS/silica matrice system has been investigated to elucidate the relaxation behaviors of the oriented organic chromophore by the poling. The value of the second order NLO coefficient d33 was 47 pm/V for the DRS/silica matrice films with 0.4 μm thickness. In addition, from the result of dramatic decreasing of UV absorbance after poling, it is speculated that the DRS may act as a liquid crystalline mesogenic groups and effectively oriented by the poling at the phase (nematic) transition temperature (80°C) and locked in by the crosslinking. The crosslinking reactions between silica matrices and DRS chromophores have been proved using 29Si solid NMR measurement.

Original languageEnglish
Pages (from-to)263-266
Number of pages4
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume294-95
DOIs
Publication statusPublished - 1997

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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