@article{albo_hu_reno_2016, 
  title={Room temperature negative differential resistance in terahertz quantum cascade laser structures}, 
  volume={109}, 
  DOI={10.1063/1.4961617}, 
  publisher={AIP Publishing}, 
  author={Albo and Hu and Reno}, 
  year={2016}, 
  month={Aug}
  }