MgTeMoO6: A neutral layered material showing strong second-harmonic generation

Growth and characterization of nonlinear optical telluromolybdate CoTeMoO 6 single crystals

“…It is worth noting that single crystals growth was also reported for closely related CdTeMoO 6 , which however crystallizes with space group P42 1 m [14]. Optical measurements also indicated that ATeMoO 6 crystals (A¼Mg, Zn, Cd) are transparent from about 0.35 to 5.4 μm [12][13][14]. MnTeMoO 6 is also transparent in a broad wavelength range, except of the 0.47-0.52 μm range [11].…”

“…Thus similar as the other compounds, CoTeMoO 6 is also expected to exhibit significant NLO properties. It has been argued that strong SHG response of these crystals can be attributed to contribution of NLO-active TeO 4 , MoO 4 and MO 6 units [11][12][13]. However, recent first-principles calculations of SHG coefficients reported for MTeMoO 6 (M ¼Mg, Zn, Cd) revised this opinion, that is, they showed that divalent cations have little contribution to the NLO response [18].…”

“…Particularly interesting NLO crystals are compounds containing Mo 6 þ or W 6 þ and cations with nonbonded electron pairs such as Se 4 þ and Te 4 þ since these cations may exhibit the second-order Jahn-Teller (SOJT) effect, which leads to the noncentrosymmetric structure and strong NLO properties in some telluromolybdates, for instance β-BaTeMo 2 O 9 [1][2][3][4][5][6][7][8]. One of promising family of telluromolybdates are ATeMoO 6 compounds (A¼Mg, Zn, Mn, Co), which crystallize in noncentrosymmetric orthorhombic crystal system with space group P2 1 2 1 2 [9][10][11][12][13]. Among this family of compounds, single crystal growth was reported recently for Mn, Zn and Mg compounds and it has been shown that these crystals display a large second harmonic generation (SHG) response of approximately 0.7, 1.1 and 1.5 Â KTP, respectively [11][12][13].…”

“…One of promising family of telluromolybdates are ATeMoO 6 compounds (A¼Mg, Zn, Mn, Co), which crystallize in noncentrosymmetric orthorhombic crystal system with space group P2 1 2 1 2 [9][10][11][12][13]. Among this family of compounds, single crystal growth was reported recently for Mn, Zn and Mg compounds and it has been shown that these crystals display a large second harmonic generation (SHG) response of approximately 0.7, 1.1 and 1.5 Â KTP, respectively [11][12][13]. It is worth noting that single crystals growth was also reported for closely related CdTeMoO 6 , which however crystallizes with space group P42 1 m [14].…”

Syntheses, structures, and characterizations of a new second-order nonlinear optical material: Pb2(SeO3)(NO3)2

“…Typical asymmetric building groups include second-order Jahn−Teller (SOJT) distorted MO 6 (M = d 0 transition metals cations, Zr 4+ , Ta 5+ , Mo 6+ , W 6+ , etc.) octahedral [1][2][3][4][5], stereochemically active lone pair cations (Se 4+ , Te 4+ , Bi 3+ , I 5+ , etc.) units [6][7][8][9], and π-conjugated system (nitrate, borate, carbonate, etc.)…”