Second Order nonlinear optical properties of the single crystal of N-benzyl 2-methyl-4-nitroaniline: Anomalous enhancement of the d333 component and its possible origin

Masazumi Fujiwara, Kazuhiro Yanagi, Minora Maruyama, Mitsuru Sugisaki, Kazuyoshi Kuroyanagi, Hironori Takahashi, Shin Ichiro Aoshima, Yutaka Tsuchiya, Andrew Gall, Hideki Hashimoto

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40 Citations (Scopus)

Abstract

A single crystal of N-benzyl 2-methyl-4-nitroaniline (BNA) whose dimensions were 8 × 10 mm (diameter × length) was grown using a vertical Bridgman method with sufficient optical transparency for spectroscopic use. Polarized reflection spectra of the crystal were measured in order to determine its linear optical parameters (refractive indices and extinction coefficients). The relative magnitudes of the d-tensor components of the crystal were determined to be d333 = (17 ± 9) × d322, d322 > d311, d311 ∼ 0 from polarization dependencies of the second harmonic generation. These results are in disagreement with previously reported theoretical studies, in which the effects of intermolecular interactions were completely neglected. Here, we have included these intermolecular interactions in the calculations assuming the presence of supra-molecular clusters. We conclude that the anomalous enhancement of d 333 is due to the interactions along the direction of the hydrogen bonds in the crystal and the resonance effect.

Original languageEnglish
Pages (from-to)8676-8685
Number of pages10
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume45
Issue number11
DOIs
Publication statusPublished - Nov 15 2006
Externally publishedYes

Keywords

  • Bridgman method
  • Nonlinear optical crystal
  • Organic crystal
  • Second harmonic generation
  • SHG
  • Single crystal
  • Supra-molecular assembly
  • Terahertz
  • Zone refining

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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