Fabrication of 2.5 THz quantum cascade laser
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摘要: 基于束缚态到连续态跃迁有源区能带结构,实现了2.5 THz量子级联激光器的连续波工作。激光器的输出频率随电流可在2.45~2.47 THz之间可调,在连续波工作模式下的最高输出功率大于6.0 mW,最高连续波工作温度为60 K,阈值电流密度为120 A/cm2,经Si透镜整形后的输出光斑为高斯分布。Abstract: Based on bound-to-continuum intersubband transition, the 2.5 THz quantum cascade laser with a continuous-wave (CW) output power of several mW is achieved. The lasing frequency of the device can be tuned by changing the applied current. The device shows a CW output power more than 6 mW, with a threshold current density of 120 A/cm2, and a lasing work temperature up to 60 K, and it is a quasi-Gaussian intensity distribution after beam reformation by using Si lens.
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Key words:
- terahertz /
- quantum cascade laser /
- continuous-wave /
- intersubband /
- Gaussian distribution
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