Distributed feedback terahertz frequency quantum cascade lasers with dual periodicity gratings
Distributed feedback terahertz frequency quantum cascade lasers with dual periodicity gratings
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DOI：
10.1063/1.4905338
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发表时间：
2015-01-05
影响因子：
4
通讯作者：
Vitiello, M. S.
中科院分区：
文献类型：
--
作者：
Castellano, F.;Zanotto, S.;Vitiello, M. S.
利用双周期分布反馈光栅实现了太赫兹量子级联激光器的发射频率和输出光束方向的独立控制。通过使用适当的波矢量散射模型，设计了在固定频率下提供光反馈所需的光栅的空间折射率调制，同时设计了以受控角度为中心的远场发射图案。实现了在0度和50度之间通过设计调谐的角度的单模太赫兹（THz）发射，从而导致高度准直的THz量子级联激光器的原始相位匹配方法。(C)2015年AIP Publishing LLC。
We have developed terahertz frequency quantum cascade lasers that exploit a double-periodicity distributed feedback grating to control the emission frequency and the output beam direction independently. The spatial refractive index modulation of the gratings necessary to provide optical feedback at a fixed frequency, and simultaneously, a far-field emission pattern centered at controlled angles, was designed through use of an appropriate wavevector scattering model. Single mode terahertz (THz) emission at angles tuned by design between 0 degrees and 50 degrees was realized, leading to an original phase-matching approach for highly collimated THz quantum cascade lasers. (C) 2015 AIP Publishing LLC.