Specular reflectivity of plasma mirrors as a function of intensity, pulse duration, and angle of incidence
Specular reflectivity of plasma mirrors as a function of intensity, pulse duration, and angle of incidence
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DOI：
10.1063/1.1525062
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发表时间：
2003
影响因子：
3.2
通讯作者：
C. Ziener;P. Foster;E. Divall;C. Hooker;M. Hutchinson;A. Langley;D. Neely
中科院分区：
文献类型：
--
作者：
C. Ziener;P. Foster;E. Divall;C. Hooker;M. Hutchinson;A. Langley;D. Neely
测量了钛宝石激光在不同入射角和两种不同脉冲长度下，由亚皮秒脉冲形成的等离子体反射镜的镜面反射率随激光强度的变化。激光脉冲能量高达250mJ，脉冲宽度分别为90和500fs，聚焦在熔融二氧化硅衬底上。当入射角在6°和45°之间时，当强度超过某一阈值强度时，镜面反射率增加到80%左右。阈值强度随脉冲长度变化，但与入射角几乎无关。对于非常高的强度，镜面反射率再次下降到仅为几个百分比的值。
The specular reflectivity of plasma mirrors formed by subpicosecond pulses from a titanium:sapphire laser has been measured for different angles of incidence and for two different pulse lengths as a function of the laser intensity. Laser pulses with energies up to 250 mJ and pulse durations of 90 and 500 fs were focused onto a fused silica substrate. For angles of incidence between 6° and 45° the specular reflectivity increases to values of about 80% for intensities above a certain threshold intensity. The threshold intensity varies with the pulse length but is nearly independent of the angle of incidence. For very high intensities the specular reflectivity drops again to values of only a few percent.