Non-linear optical response of rutile-related oxides, LiMVMVIO6, and their derivatives obtained by ion-exchange and intercalation

Abstract

Polycrystalline samples of oxides of the general formula LiM^VM^VIO₆(M^V= Nb, Ta; M^VI= Mo, W), crystallizing in a non-centrosymmetric (space group P2₁m) trirutile structure, exhibit second harmonic generation (SHG) of 1064 nm radiation with efficiencies 15–45 times that of α-quartz; interestingly, the SHG response is retained by the protonated derivatives HM^VM^VIO₆·xH₂O, and their n-alkylamine intercalates as well.