Nonlinear active materials: An illustration of controllable phase matchability

Hongcheng Lu, Romain Gautier, Martin D. Donakowski, T. Thao Tran, Bryce W. Edwards, Juan C. Nino, P. Shiv Halasyamani, Zhengtang Liu, Kenneth R. Poeppelmeier*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

93 Scopus citations


For a crystal to exhibit nonlinear optical (NLO) activity such as second-harmonic generation (SHG), it must belong to a noncentrosymmetric (NCS) space group. Moreover, for these nonlinear optical (NLO) materials to be suitable for practical uses, the synthesized crystals should be phase-matchable (PM). Previous synthetic research into SHG-active crystals has centered on (i) how to create NCS compounds and/or (ii) how to obtain NCS compounds with high SHG efficiencies. With these tactics, one can synthesize a material with a high SHG efficiency, but the material could be unusable if the material was nonphase-matchable (non-PM). To probe the origin of phase matchability of NCS structures, we present two new chemically similar hybrid compounds within one composition space: (I) [Hdpa]2NbOF5·2H2O and (II) HdpaNbOF4 (dpa = 2,2′-dipyridylamine). Both compounds are NCS and chemically similar, but (I) is non-PM while (II) is PM. Our results indicate - consistent with organic crystallography - the arrangement of the organic molecule within hybrid materials dictates whether the material is PM or non-PM.

Original languageEnglish (US)
Pages (from-to)11942-11950
Number of pages9
JournalJournal of the American Chemical Society
Issue number32
StatePublished - Aug 14 2013

ASJC Scopus subject areas

  • General Chemistry
  • Biochemistry
  • Catalysis
  • Colloid and Surface Chemistry


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