Science Advances

Supplementary Materials

This PDF file includes:

  • Supplementary Notes
  • Table S1. Representative cases for sensitivity and uncertainty analysis.
  • Fig. S1. TEM images of representative GaAs/AlAs SLs.
  • Fig. S2. Cross-sectional TEM images of representative SLs.
  • Fig. S3. Sample structural characterizations using XRD, TEM, and PNR.
  • Fig. S4. Representative TDTR data sets and fits for samples with no ErAs nanodots.
  • Fig. S5. Representative TDTR data sets and fits for samples with 25% ErAs nanodots coverage.
  • Fig. S6. Computed sensitivity and residual contour when fitting to the TDTR signal amplitude.
  • Fig. S7. Representative results from the Monte Carlo simulations of TDTR.
  • Fig. S8. Thermal conductivities for short-period SLs as a function of the number of periods and at different temperatures.
  • Fig. S9. Theoretical SL phonon dispersion relation ω(k) from Γ to X.
  • Fig. S10. Raman spectra for representative SLs (16-, 200-, and 300-period SLs with each level of ErAs coverage).
  • Fig. S11. Thermal conductivity as a function of pump modulation frequency at a range of temperatures.
  • Fig. S12. TDTR amplitude data for all the SLs with 6-MHz modulation at 200, 40, and 30 K.
  • References (5052)

Download PDF

Files in this Data Supplement: