Terahertz quantum-cascade lasers based on an interlaced photon-phonon cascade
Terahertz quantum-cascade lasers based on an interlaced photon-phonon cascade
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DOI：
10.1063/1.1650905
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发表时间：
2004-02-23
影响因子：
4
通讯作者：
Ritchie, DA
中科院分区：
文献类型：
--
作者：
Köhler, R;Tredicucci, A;Ritchie, DA
已经开发了一种太赫兹（THz）量子级联激光器，该激光器利用交替的光子和声子发射级实现从较低激光能级有效提取电子。电子的热膨胀大大减少，导致高达95 K的操作和弱的温度依赖性的功率与电流斜率效率。阈值电流密度在6 K时为280 A·cm ~（-2），在90 K时增加到580 A·cm ~（-2）。在30 K和80 K下分别获得了10 mW和4 mW的峰值输出功率。(C)2004年，美国物理学会。
A THz (lambdasimilar to80 mum) quantum-cascade laser utilizing alternating photon- and phonon-emitting stages has been developed to achieve efficient extraction of electrons from the lower laser level. Thermal backfilling of electrons is drastically reduced leading to an operation up to 95 K and a weak temperature dependence of the power versus current slope efficiency. The threshold current density is 280 A cm(-2) at 6 K and increases to 580 A cm(-2) at 90 K. Peak output powers of 10 mW at 30 K and 4 mW at 80 K are obtained. (C) 2004 American Institute of Physics.