Figure 2From: Microstructure and optical properties of Pr3+-doped hafnium silicate filmsFTIR spectra of samples and detailed spectra between 800 and 1,020 cm−1. (a) FTIR spectra of samples measured at Brewster’s angle (65°) as a function of TA for 1 h of nitrogen flow. Si-O bands are marked by dashed lines. (b) Detailed spectra between 800 and 1,020 cm−1 for better observation of the peak position in this range.Back to article page