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Ligand Engineering for Broadening Infrared Luminescence of Kramers Ytterbium Ions in Disordered Sesquioxides
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2019-06-10 00:00:00 , DOI: 10.1021/acs.cgd.9b00034 Wenyu Liu 1 , Dazhi Lu 1 , Shilie Pan 2 , Min Xu 3 , Yin Hang 3 , Haohai Yu 1 , Huaijin Zhang 1 , Jiyang Wang 1
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2019-06-10 00:00:00 , DOI: 10.1021/acs.cgd.9b00034 Wenyu Liu 1 , Dazhi Lu 1 , Shilie Pan 2 , Min Xu 3 , Yin Hang 3 , Haohai Yu 1 , Huaijin Zhang 1 , Jiyang Wang 1
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Efficient, high-power ultrafast lasers and their further chirped pulse amplification (CPA) are important for modern science, which requires the laser medium with high thermal conductivity, low phonon energy, and broadband luminescence. Active ions doped sesquioxide crystals possess high thermal conductivity and low phonon energy and was considered as ideal laser media if their luminescence is broadened. However, constrained by their high melting points (>2400 °C), the achievement of high-quality sesquioxide crystals is a current challenge, and their spectra broadening has rarely been investigated. Here, on the basis of the successful growth of the Kramer Yb3+ ions doped novel sesquioxide LuxSc2-xO3 (0 ≤ x ≤ 2) crystals, the spectral width of the crystals can be broadened about three times by distorting the octahedral ligands. The optimized sesquioxide crystal has an ultrabroadband near-infrared luminescence, covering the wavelength range from 900 to 1200 nm. By investigating the distorted octahedral ligands and the relationship between phonon vibrations and the crystal components, we found that the local polarization and the electron–phonon coupling should be responsible for the luminescence broadening. This work presents a series of novel gain materials, which have promising applications in ultrafast lasers and CPA, and will be helpful for the design of novel materials with tailored luminescence properties.
中文翻译：
配体工程技术，用于扩大无序的过氧化物中的Kramers tter离子的红外发光
高效，高功率的超快激光器及其进一步的pulse脉冲放大（CPA）对于现代科学非常重要，现代科学要求激光介质具有高导热率，低声子能和宽带发光性。掺杂有活性离子的倍半氧化物晶体具有较高的热导率和较低的声子能量，并且如果它们的发光变宽，则被认为是理想的激光介质。然而，受其高熔点（> 2400°C）的限制，高质量的倍半氧化物晶体的实现是当前的挑战，并且很少研究其光谱展宽。在此，成功地掺杂了Kramer Yb 3+离子，掺杂了新型倍半氧化物Lu x Sc 2- x O 3（0≤x≤2）晶体，通过扭曲八面体配体可以将晶体的光谱宽度扩大约三倍。优化的倍半氧化物晶体具有超宽带近红外发光，覆盖900至1200 nm的波长范围。通过研究扭曲的八面体配体以及声子振动与晶体成分之间的关系，我们发现局部极化和电子-声子耦合应负责发光的展宽。这项工作提出了一系列新颖的增益材料，这些材料在超快激光器和CPA中具有广阔的应用前景，将有助于设计具有定制发光特性的新颖材料。
更新日期：2019-06-10
中文翻译：
配体工程技术，用于扩大无序的过氧化物中的Kramers tter离子的红外发光
高效，高功率的超快激光器及其进一步的pulse脉冲放大（CPA）对于现代科学非常重要，现代科学要求激光介质具有高导热率，低声子能和宽带发光性。掺杂有活性离子的倍半氧化物晶体具有较高的热导率和较低的声子能量，并且如果它们的发光变宽，则被认为是理想的激光介质。然而，受其高熔点（> 2400°C）的限制，高质量的倍半氧化物晶体的实现是当前的挑战，并且很少研究其光谱展宽。在此，成功地掺杂了Kramer Yb 3+离子，掺杂了新型倍半氧化物Lu x Sc 2- x O 3（0≤x≤2）晶体，通过扭曲八面体配体可以将晶体的光谱宽度扩大约三倍。优化的倍半氧化物晶体具有超宽带近红外发光，覆盖900至1200 nm的波长范围。通过研究扭曲的八面体配体以及声子振动与晶体成分之间的关系，我们发现局部极化和电子-声子耦合应负责发光的展宽。这项工作提出了一系列新颖的增益材料，这些材料在超快激光器和CPA中具有广阔的应用前景，将有助于设计具有定制发光特性的新颖材料。
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