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中国科学通报：英文版

Numerical study of threshold gain behavior for a THz random laser in a two-dimensional active disordered medium with a three-level atomic system

Liu, Yong, Jinsong, Wang, Kejia

Published Jan 1, 2011• 0 citations
OpenAlex

Abstract

由数字地解决马方程和率方程在一二维(2D ) 用有一个三水平的原子系统的红宝石谷物做的活跃随机的媒介，为 THz 随机的激光的阀值获得行为被调查。光谱有抽的率的紧张变化为两个被计算横向磁性(TM ) 回答并且横向电(TE ) 领域。计算结果证明放射激光的那 THz 随机能发生在 2D TM 和 TE 案例的混乱媒介。进一步的分析表明放射激光的 THz 为 TM 领域的阀值为 TE 领域是比那低的。

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由数字地解决马方程和率方程在一二维(2D ) 用有一个三水平的原子系统的红宝石谷物做的活跃随机的媒介，为 THz 随机的激光的阀值获得行为被调查。光谱有抽的率的紧张变化为两个被计算横向磁性(TM ) 回答并且横向电(TE ) 领域。计算结果证明放射激光的那 THz 随机能发生在 2D TM 和 TE 案例的混乱媒介。进一步的分析表明放射激光的 THz 为 TM 领域的阀值为 TE 领域是比那低的。
By numerically solving Maxwell’s equations and rate equations in a two-dimensional (2D) active random media made of ruby grains with a three-level atomic system, the threshold gain behavior for a THz random laser is investigated. The spectral intensity variation with the pumping rate is calculated for both the transverse magnetic (TM) field and the transverse electric (TE) field. The computed results show that THz random lasing could occur in a 2D disordered medium for both the TM and TE cases. Further analysis reveals that the THz lasing threshold for TM fields is lower than that for TE fields.
我们理论上在单个模式的探查激光驾驶的四水平的原子的光学地稠密的媒介调查非线性的吸收和人口动力学的反应，经由拿偶极子偶极子(NDD ) 附近的密度依赖者相互作用进考虑。探查的吸收上的效果删除的 NDD 和人口动力学的影响经由数字计算被预言。NDD 效果能随 NDD 相互作用的力量的增加逐渐地归结为短暂吸收，这被显示出，并且短暂扩大能被完成。在不变的限制，探查地为强壮的 NDD 相互作用展出透明性。或者，人口完全由于 NDD 效果以扎根的状态留下。
By numerically solving Maxwell’s equations and rate equations in a two-dimensional (2D) active random media made of ruby grains with a three-level atomic system, the threshold gain behavior for a THz random laser is investigated. The spectral intensity variation with the pumping rate is calculated for both the transverse magnetic (TM) field and the transverse electric (TE) field. The computed results show that THz random lasing could occur in a 2D disordered medium for both the TM and TE cases. Further analysis reveals that the THz lasing threshold for TM fields is lower than that for TE fields.