Almuqrin Aljawhara H, Gangareddy Jagannath, Hivrekar Mahesh M, Pramod A G, Sayyed M I, Keshavamurthy K, Fatima Naseem, Jadhav K M
Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia.
Department of Post-Graduate Studies and Research in Physics, The National College, Jayanagar, Bengaluru 560070, Karnataka, India.
Materials (Basel). 2022 Mar 21;15(6):2330. doi: 10.3390/ma15062330.
Strong nonlinear absorption (NLA), reduced optical limiting (OL) thresholds, and high radiation shielding parameters are required for the effective use of glasses in the laser radiation and nuclear radiation protecting materials. In view of this, the efficacy of SmO on the nonlinear optical (NLO) and OL properties were ascertained (at 532 nm) along with radiation shielding characteristics. The open and closed aperture Z-scan profiles revealed the presence of positive NLA and nonlinear refraction (NLR) phenomena respectively. OL measurements showed the existence of limiting behavior in the studied glasses. The NLA and NLR coefficients were improved while the OL thresholds were decreased as the doping of SmO elevated to a higher doping level. These improvements in NLA, NLR coefficients and OL efficiencies were attributed to the non-bridging oxygens and high polarizable Sm ions. The NLA and OL results clearly suggest the high (5 mol %) SmO doped glass (Sm5CNLB) glass is beneficial to protect the delicate devices and human eye by suppressing the high energy laser light. The theoretical linear attenuation coefficients (LAC) values of the presented SmCNLB glasses were obtained with the help of Phy-X software between 0.284 and 1.333 MeV. At 0.284 MeV, the maximum values occur and take values between 0.302 (for Sm0CNLB) and 0.409 cm (for Sm5CNLB). We found that the LAC for the presented SmCNLB glasses is a function of SmO content, where the LAC tends to increase, corresponding to the high probabilities of interaction, as the content of SmO changes from 0 to 5 mol %. The effective atomic number (Z) for the presented SmCNLB glasses was examined between 0.284 and 1.333 MeV. As the amount of SmO is added, the Z increases, and this was observed at any energy.
为了有效地将玻璃用于激光辐射和核辐射防护材料，需要强非线性吸收（NLA）、降低的光学限幅（OL）阈值和高辐射屏蔽参数。鉴于此，研究了SmO对非线性光学（NLO）和OL性能的影响（在532 nm波长下）以及辐射屏蔽特性。开孔和闭孔Z扫描曲线分别揭示了正NLA和非线性折射（NLR）现象的存在。OL测量表明所研究的玻璃存在限幅行为。随着SmO掺杂量提高到更高水平，NLA和NLR系数得到改善，而OL阈值降低。NLA、NLR系数和OL效率的这些改善归因于非桥氧和高极化率的Sm离子。NLA和OL结果清楚地表明，高（5 mol%）SmO掺杂玻璃（Sm5CNLB）有利于通过抑制高能激光来保护精密设备和人眼。借助Phy-X软件获得了所呈现的SmCNLB玻璃在0.284至1.333 MeV之间的理论线性衰减系数（LAC）值。在0.284 MeV时出现最大值，取值范围在0.302（对于Sm0CNLB）至0.409 cm（对于Sm5CNLB）之间。我们发现所呈现的SmCNLB玻璃的LAC是SmO含量的函数，随着SmO含量从0变化到5 mol%，LAC趋于增加，这对应于更高的相互作用概率。在所呈现的SmCNLB玻璃中，在0.284至1.333 MeV之间研究了有效原子序数（Z）。随着SmO添加量的增加，Z增大，并且在任何能量下均观察到这种情况。
