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Li2TiTeO6 nonlinear optical single-crystal flakes for broadband terahertz radiation

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【作者】 牛耀楷于洁陈尚志万胡杰谭云昕曾小雪孙晓谢金龙高泽亮文岐业

【Author】 Yaokai Niu;Jie Yu;Shangzhi Chen;Hujie Wan;Yunxin Tan;Xiaoxue Zeng;Xiao Sun;Jinlong Xie;Zeliang Gao;Qiye Wen;School of Electronic Science and Engineering, University of Electronic Science and Technology of China;Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China;State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University;State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China;

【通讯作者】 高泽亮;文岐业;

【机构】 School of Electronic Science and Engineering, University of Electronic Science and Technology of ChinaShenzhen Institute for Advanced Study, University of Electronic Science and Technology of ChinaState Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong UniversityState Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China

【摘要】 Terahertz(THz) radiation sources are essential for spectroscopy,imaging,and communications,yet most laser-driven nonlinear crystals suffer from limited bandwidth,strong absorption,and low damage thresholds.Here,we report Li2TiTeO6(LTTO),a novel oxide nonlinear crystal,as an efficient broadband THz emitter via the optical rectification(OR) effect.Under 800 nm femtosecond laser excitation,LTTO produces a gap-free THz emission spectrum covering 0.1-4.5 THz,which is significantly broader than that of ZnTe.Furthermore,LTTO was applied to substance identification and polarization modulation of the THz beam.These findings establish LTTO as a promising nonlinear crystal for practical broadband THz sources.

【Abstract】 Terahertz(THz) radiation sources are essential for spectroscopy,imaging,and communications,yet most laser-driven nonlinear crystals suffer from limited bandwidth,strong absorption,and low damage thresholds.Here,we report Li2TiTeO6(LTTO),a novel oxide nonlinear crystal,as an efficient broadband THz emitter via the optical rectification(OR) effect.Under 800 nm femtosecond laser excitation,LTTO produces a gap-free THz emission spectrum covering 0.1-4.5 THz,which is significantly broader than that of ZnTe.Furthermore,LTTO was applied to substance identification and polarization modulation of the THz beam.These findings establish LTTO as a promising nonlinear crystal for practical broadband THz sources.

【基金】 supported by the National Key Research and Development Program of China (No. 2023YFB3811305);the National Natural Science Foundation of China(Nos. 62235004 and 62311530115);the Open Foundation of China-Belarus Belt and Road Joint Laboratory on Electromagnetic Environment Effect (No. ZBKF2024031002);the Shenzhen Science and Technology Program(No. KQTD20200820113010022)
  • 【文献出处】 Chinese Optics Letters ,中国光学快报(英文版) , 编辑部邮箱 ,2026年05期
  • 【分类号】O734;O441.4;TN249
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