Figure 5From: Temperature-dependent Raman investigation of rolled up InGaAs/GaAs microtubesThermal investigation under 632.8-nm excitation. (a) Temperature dependence of the LO phonon mode of the GaAs on the tube and on the substrate, respectively. Error bars represent the spectral resolution of ±1 cm−1. Panel (b) shows the reversibility in the Raman spectra on the tube after heating to 300°C and cooling down again.Back to article page