Guili Wang, Wentian Wu, Chunxiao Li and Jiyong Yao
{"title":"Rare-earth oxychalcogenide Eu2ZnGe2OS6: a phase-matching infrared nonlinear optical material with [GeOS3] units†","authors":"Guili Wang, Wentian Wu, Chunxiao Li and Jiyong Yao","doi":"10.1039/D4CE01051E","DOIUrl":null,"url":null,"abstract":"<p >Oxychalcogenides have been highly anticipated as nonlinear optical (NLO) crystals because of their excellent optical properties. Herein, a rare-earth oxychalcogenide Eu<small><sub>2</sub></small>ZnGe<small><sub>2</sub></small>OS<small><sub>6</sub></small> was successfully designed and synthesized. It crystallizes in the non-centrosymmetric <em>P</em><img>2<small><sub>1</sub></small><em>m</em> space group with highly polarized mixed-anion [GeOS<small><sub>3</sub></small>] units and exhibits an indirect band gap of 2.22 eV, a moderate second harmonic generation (SHG) response (0.4 × AGS), and phase-matching properties. Additionally, Eu<small><sub>2</sub></small>ZnGe<small><sub>2</sub></small>OS<small><sub>6</sub></small> exhibits a significant calculated birefringence of 0.173@2090 nm. This research has enriched the rarely studied rare-earth oxychalcogenide system and provided new ideas for the design of promising IR NLO crystals.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 47","pages":" 6683-6687"},"PeriodicalIF":2.6000,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ce/d4ce01051e?page=search","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"CrystEngComm","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/ce/d4ce01051e","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Oxychalcogenides have been highly anticipated as nonlinear optical (NLO) crystals because of their excellent optical properties. Herein, a rare-earth oxychalcogenide Eu2ZnGe2OS6 was successfully designed and synthesized. It crystallizes in the non-centrosymmetric P21m space group with highly polarized mixed-anion [GeOS3] units and exhibits an indirect band gap of 2.22 eV, a moderate second harmonic generation (SHG) response (0.4 × AGS), and phase-matching properties. Additionally, Eu2ZnGe2OS6 exhibits a significant calculated birefringence of 0.173@2090 nm. This research has enriched the rarely studied rare-earth oxychalcogenide system and provided new ideas for the design of promising IR NLO crystals.
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