Discrete mode tuning in terahertz quantum cascade lasers.

@article{Chakraborty2012DiscreteMT,
  title={Discrete mode tuning in terahertz quantum cascade lasers.},
  author={Subhasish Chakraborty and Owen P Marshall and Chen Wei Hsin and Md Khairuzzaman and Harvey E. Beere and David A. Ritchie},
  journal={Optics express},
  year={2012},
  volume={20 26},
  pages={B306-14}
}
A holographically designed, aperiodic distributed feedback grating is used as a multi-resonance filter and embedded within an existing Fabry-Pérot (FP) terahertz (THz) quantum cascade laser (QCL) cavity. Balancing the feedback strengths of the filter resonances and the FP cavity creates a system capable of a high degree of single-mode selectivity, which is sensitive to changes in driving current. Multi-moded QCLs operating around 2.9 THz are thus modified to achieve purely electronic discrete… CONTINUE READING

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