Journal
CHEMISTRY OF MATERIALS
Volume 32, Issue 23, Pages 10045-10054Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.0c03268
Keywords
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Funding
- United States National Science Foundation [DMR-1611198]
- National Research Foundation of Korea (NRF) - Korean government [2017R1D1A1B03035539, 2020R1F1A1069646]
- National Research Foundation of Korea [2017R1D1A1B03035539, 2020R1F1A1069646] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The novel diamond-like Li4CdSn2S7 possesses many outstanding attributes that enable it to be a new, well-rounded front-runner among infrared (IR) nonlinear-optical materials, especially for high-intensity laser applications. Distortions of the metal-sulfur tetrahedra in accordance with Pauling's second rule give rise to a significant net dipole moment, resulting in a strong second-order nonlinear optical susceptibility (chi((2))) of 35.0 +/- 3.5 pm/V. Li4CdSn2S7 possesses an optical bandgap of 2.59 eV and an exceptional laser-induced damage threshold of >2.5 GW/cm(2), which is more than 12.5 times greater than that of AgGaSe2 measured under identical irradiation conditions. Li4CdSn2S7 possesses a melting point of similar to 780 degrees C and phase-matchability. All data indicate that Li4CdSn2S7 will outperform AgGaS2 and AgGaSe2 in difference frequency generation schemes for the generation of mid-IR radiation. New information on the recently reported Li2CdSiS4, which Li-4 CdSn2S7 also outperforms, is additionally included.
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