研究了Hg Cd Te红外探测器的结构以及材料特性,阐述了激光损伤Hg Cd Te红外探测器的机理,建立了Hg Cd Te红外探测器三维仿真模型,利用有限元分析法,对10.6μm CO2激光辐照Hg Cd Te探测器的温度变化情况进行了仿真,并通过参考已有文献的...研究了Hg Cd Te红外探测器的结构以及材料特性,阐述了激光损伤Hg Cd Te红外探测器的机理,建立了Hg Cd Te红外探测器三维仿真模型,利用有限元分析法,对10.6μm CO2激光辐照Hg Cd Te探测器的温度变化情况进行了仿真,并通过参考已有文献的实验数据,验证了模型的准确性。当Hg Cd Te探测器受到峰值功率密度为5×107 W/cm2的单脉冲激光辐照时,Hg Cd Te晶体的Hg离子开始析出,探测器性能降低,并不可恢复;当激光峰值功率为108 W/cm2,探测器Hg Cd Te晶体开始出现熔融现象,此时激光能量密度为1 J/cm2;当激光峰值功率为2×108 W/cm2时,铟柱达到熔融温度,探测器会出现铟柱脱落现象,被彻底损坏。展开更多
The frequency dependence of the in-plane angular change of the antiferromagnetic resonance （AFMR） field of KCuF3 is systematically measured at frequencies ranging from 3.8 to 10.6 GHz at 4.2K. The effect of inequiva...The frequency dependence of the in-plane angular change of the antiferromagnetic resonance （AFMR） field of KCuF3 is systematically measured at frequencies ranging from 3.8 to 10.6 GHz at 4.2K. The effect of inequivalent g-tensors is found to gradually diminish with decreasing the frequency, and completely vanish when the frequency is decreased to the lower-frequency branch of C-band, while the effect of the effective anisotropy field is significantly enhanced with decreasing the frequency. The calculated AFMR field Hres based on the eight-sublattice model proposed by Yamada and Kato [J. Phys. Soc. Jpn. 63 （1994）289] is in good agreement with the experimental data.展开更多
文摘研究了Hg Cd Te红外探测器的结构以及材料特性,阐述了激光损伤Hg Cd Te红外探测器的机理,建立了Hg Cd Te红外探测器三维仿真模型,利用有限元分析法,对10.6μm CO2激光辐照Hg Cd Te探测器的温度变化情况进行了仿真,并通过参考已有文献的实验数据,验证了模型的准确性。当Hg Cd Te探测器受到峰值功率密度为5×107 W/cm2的单脉冲激光辐照时,Hg Cd Te晶体的Hg离子开始析出,探测器性能降低,并不可恢复;当激光峰值功率为108 W/cm2,探测器Hg Cd Te晶体开始出现熔融现象,此时激光能量密度为1 J/cm2;当激光峰值功率为2×108 W/cm2时,铟柱达到熔融温度,探测器会出现铟柱脱落现象,被彻底损坏。
文摘The frequency dependence of the in-plane angular change of the antiferromagnetic resonance （AFMR） field of KCuF3 is systematically measured at frequencies ranging from 3.8 to 10.6 GHz at 4.2K. The effect of inequivalent g-tensors is found to gradually diminish with decreasing the frequency, and completely vanish when the frequency is decreased to the lower-frequency branch of C-band, while the effect of the effective anisotropy field is significantly enhanced with decreasing the frequency. The calculated AFMR field Hres based on the eight-sublattice model proposed by Yamada and Kato [J. Phys. Soc. Jpn. 63 （1994）289] is in good agreement with the experimental data.
