Intermolecular coupling enhancement of the molecular hyperpolarizability in NLO dendrons

Shiyoshi Yokoyama, S. Mashiko

Research output: Contribution to journalConference article

Abstract

Nonlinear optical dendritic macromolecules, called azobenzene dendrons, were synthesized by adding 1-15 azobenzene branching units as second-order nonlinear optical chromophore and placing aliphatic chains at the chain end. The electronic structure of azobenzene dendrons, which were expected to become dipolar, was proven by second-order nonlinear optical properties. The hyper-Rayleigh scattering result indicated that they had a rod-shaped molecular structure, where chromophoric units were oriented noncentrosymmetrically along the molecular axis and each of units coherently contributed to the second harmonic generation. The first-order molecular hyperpolarizability was 3,010 × 10-30 esu for an azobenzene dendron having 15 azobenzene chromophores. This level of hyperpolarizability was significantly higher than the hyperpolarizability of 150 × 10-30 esu for a momomeric azobenzene chromophore.

Original languageEnglish
Pages (from-to)47-50
Number of pages4
JournalMolecular Crystals and Liquid Crystals Science and Technology Section B: Nonlinear Optics
Volume24
Issue number1-2
Publication statusPublished - Dec 1 2000
EventChitose Internatinal Forum on Photonic Sciences - Chitose, Japan
Duration: Oct 12 1999Oct 13 1999

Fingerprint

Dendrimers
Azobenzene
chromophores
augmentation
Chromophores
Rayleigh scattering
macromolecules
harmonic generations
molecular structure
rods
electronic structure
optical properties
Harmonic generation
Macromolecules
Molecular structure
Electronic structure
azobenzene
Optical properties

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Condensed Matter Physics

Cite this

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abstract = "Nonlinear optical dendritic macromolecules, called azobenzene dendrons, were synthesized by adding 1-15 azobenzene branching units as second-order nonlinear optical chromophore and placing aliphatic chains at the chain end. The electronic structure of azobenzene dendrons, which were expected to become dipolar, was proven by second-order nonlinear optical properties. The hyper-Rayleigh scattering result indicated that they had a rod-shaped molecular structure, where chromophoric units were oriented noncentrosymmetrically along the molecular axis and each of units coherently contributed to the second harmonic generation. The first-order molecular hyperpolarizability was 3,010 × 10-30 esu for an azobenzene dendron having 15 azobenzene chromophores. This level of hyperpolarizability was significantly higher than the hyperpolarizability of 150 × 10-30 esu for a momomeric azobenzene chromophore.",
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N2 - Nonlinear optical dendritic macromolecules, called azobenzene dendrons, were synthesized by adding 1-15 azobenzene branching units as second-order nonlinear optical chromophore and placing aliphatic chains at the chain end. The electronic structure of azobenzene dendrons, which were expected to become dipolar, was proven by second-order nonlinear optical properties. The hyper-Rayleigh scattering result indicated that they had a rod-shaped molecular structure, where chromophoric units were oriented noncentrosymmetrically along the molecular axis and each of units coherently contributed to the second harmonic generation. The first-order molecular hyperpolarizability was 3,010 × 10-30 esu for an azobenzene dendron having 15 azobenzene chromophores. This level of hyperpolarizability was significantly higher than the hyperpolarizability of 150 × 10-30 esu for a momomeric azobenzene chromophore.

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