The Carrier Dynamics of PtTe₂ Nanoplates and Their Application in ~2 μm Pulsed Laser

• Published in: IEEE photonics technology letters 2024-06, Vol.36 (12), p.815-818
• Main Authors: Jin, Yicheng, Li, Kuan, Lv, Jiawen, Dong, Lulu, Wang, Peifu, Liu, Junting, Diao, Dasheng, Liu, Shande
• Format: Article
• Language: English
• Subjects: 2 μm solid-state laser; Laser excitation; Laser stability; Measurement by laser beam; Multilayers; Optical switches; Power generation; Power lasers; PtTe₂ nanoplates; Pulse duration; Pulsed lasers; Pump lasers; Recovery time; Ultrafast carrier dynamics
• ISSN: 1041-1135; 1941-0174
• DOI: 10.1109/LPT.2024.3400687

Pulse lasers operating in the \sim 2~\mu m are gaining significant application in environmental atmosphere monitoring and optical communication. In the conducted study, high-quality, multilayer PtTe2 nanoplates were effectively synthesized through the mechanical exfoliation method. Additionally, the carrier dynamics process of PtTe2 nanoplates was characterized, and the results indicate an ultrafast saturation recovery time (~10 ps), which renders it an optimal choice for generating \sim 2~\mu m pulse lasers. By utilizing PtTe2 nanoplates as saturable absorbers (SA), experimentation yielded a minimum pulse width of 608 ns, alongside an average output power of 1.7 W. This corresponds to a maximum single pulse energy of 17.9~\mu J and a peak pulse power of 29.7 W. Our findings suggest that PtTe2 could serve as a potential SA in pulse lasers for the \sim 2~\mu m.