Science Advances

Supplementary Materials

This PDF file includes:

  • Supplementary Text
  • Fig. S1. Conduction band diagrams.
  • Fig. S2. Characteristics of the first order distributed feedback lasers and the FP lasers of the reference InGaAs/GaAsSb structure.
  • Fig. S3. Nonequilibrium Green’s function simulation results.
  • Fig. S4. Phonon-polariton dispersion (red) and lower polariton Hopfield coefficients of the phonon (hphon.) and photon (hphot.) components for a 4.7-THz GaAs/AlGaAs QCL (53).
  • Fig. S5. Raman spectroscopy of the four-well InGaAs/AlInGaAs QCL emitting at 3.6 THz.
  • Table S1. Layer structures and properties of all the grown samples.
  • Table S2. Selection rules for Raman backscattering from TO phonon modes polarized along the y′ or z directions, as well as LO phonon modes.
  • References (4653)

Download PDF

Files in this Data Supplement: