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  Ghazanfari, M.R.; Vittadello, L.; Al-Sabbagh, D.; Santhosh, A.; Frankcom, C.; Fuß, F.; Von Randow, C.A.; Siemensmeyer, K.; Vrijmoed, J.C.; Emmerling, F.; Jerabek, P.; Imlau, M.; Thiele, G.: Remarkable Infrared Nonlinear Optical, Dielectric, and Strong Diamagnetic Characteristics of Semiconducting K₃[BiS₃]. The Journal of Physical Chemistry Letters 13 (2022), p. 6987-6993

10.1021/acs.jpclett.2c01689

Abstract:
The ternary sulfido bismuthate K3[BiS3] is synthesized in quantitative yields. The material exhibits nonlinear optical properties with strong second harmonic generation properties at arbitrary wavelengths in the infrared spectral range and a notable laser-induced damage threshold of 5.22 GW cm−2 for pulsed laser radiation at a wavelength of 1040 nm, a pulse duration of 180 fs, and a repetition rate of 12.5 kHz. K3[BiS3] indicates semiconductivity with a direct optical band gap of 2.51 eV. Dielectric and impedance characterizations demonstrate κ values in the range of 6−13 at 1 kHz and a high electrical resistivity. A strong diamagnetic behavior with a susceptibility of −2.73 × 10−4 m3 kg−1 at room temperature is observed. These results suggest it is a promising nonlinear optical candidate for the infrared region. The synergic physical characteristics of K3[BiS3] provide insight into the correlation of optical, electrical, and magnetic properties.