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Nonlinear Optical Response of Au/CsPbI3 Quantum Dots and Its Laser Modulation Characteristics at 2.7 μm
Mengqi Lv1, Jin Zhao1, Leilei Guo1
1Shandong Advanced Optoelectronic Materials and Technologies Engineering Laboratory, School of Mathematics and Physics, Qingdao University of Science & Technology, Qingdao 266061, China.
Abstract:
A passively Q-switched Er:YAP laser of 2.7 µm, utilizing Au-doped CsPbI3 quantum dots (QDs) as a saturable absorber (SA), was realized. It was operated stably with a minimum pulse width of 185 ns and a maximum repetition rate of 480 kHz. The maximum pulse energy and the maximum peak power were 0.6 μJ and 2.9 W, respectively, in the Q-switched operation. The results show that the CsPbI3 QDs SA exhibits remarkable laser modulation properties at ~3 μm.
