@misc{indiciae5a48dd44bd89,
  title = {Resonant second-order nonlinear optical processes in quantum cascade lasers.},
  author = {Nina Owschimikow and Claire Gmachl and Alexey Belyanin and Vitaly Kocharovsky and Deborah L Sivco and Raffaele Colombelli and Federico Capasso and Alfred Y Cho},
  year = {2003},
  doi = {10.1103/physrevlett.90.043902},
  url = {https://pubmed.ncbi.nlm.nih.gov/12570424/},
  note = {Source identifier: 12570424}
}