Bismuth-content-dependent polarized Raman spectrum of InPBi alloy

Wei Guan-Nan¹, Tan Qing-Hai¹, Dai Xing¹, Feng Qi¹, Luo Wen-Gang¹, Sheng Yu¹, Wang Kai², Pan Wen-Wu², Zhang Li-Yao², Wang Shu-Min², Wang Kai-You^{1, †,}

(a) Infrared Raman spectra for a series of InPBi samples. The pink sections (2TO), the olive sections (TO + LO) and blue ones (2LO) represent the overtones of TO and LO. (b) The Bi doping level dependent Raman shifts of the 2LO and TO + LO. The dots represent the experimental data, while the straight lines represent the linear fitting progress. (c) The Bi doping level dependent FWHM of 2LO, where the dots represent the experimental data, and the line guides the eye.