Strong second harmonic generation from the tantalum thioarsenates A 3Ta 2AsS 11 (A = K and Rb)

Tarun K. Bera, Joon I. Jang, John B. Ketterson, Mercouri G. Kanatzidis

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201 Scopus citations


The strongly anisotropic thioarsenates A 3Ta 2AsS 11 are stabilized in a polysulfide flux. All compounds contain the same parallel 1/∞ [Ta 2AsS 11 3-] polymeric anionic chains, but the size of the alkali-metals has a profound effect on the packing of the chains. The K + or Rb + favor noncentrosymmetric packing of the chains, whereas the larger Cs + favors the centrosymmetric packing. The chains feature the combination of two asymmetric units [Ta 2S 11] and [AsS 3] and exhibit strong nonlinear optical (NLO) second harmonic generation (SHG) response. Polycrystalline samples exhibit is up to × 15 times stronger SHG than that of commercially used AgGaSe 2.

Original languageEnglish (US)
Pages (from-to)75-77
Number of pages3
JournalJournal of the American Chemical Society
Issue number1
StatePublished - Jan 14 2009

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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