Exciton–phonon interaction in Al0.4Ga0.6N/Al0.53Ga0.47N multiple quantum wells

Exciton–phonon interaction in Al_0.4Ga_0.6N/Al_0.53Ga_0.47N multiple quantum wells

Liu Ya-Li¹, Jin Peng^{1, †,}, Liu Gui-Peng¹, Wang Wei-Ying², Qi Zhi-Qiang³, Chen Chang-Qing³, Wang Zhan-Guo¹

(a) PL spectrum of Al_0.4Ga_0.6N/Al_0.53Ga_0.47N MQWs at T = 10 K, showing four phonon replicas of the excitonic transition at 4.591 eV with an LO phonon energy of about 98 meV by a multi-peak Gaussian fitting. The dotted lines are the fitting curves. (b) Temperature dependent PL spectra of Al_0.4Ga_0.6N/Al_0.53Ga_0.47N MQWs. The solid circles indicate the main peak positions of the spectra.