Ultrafast and large optical nonlinearity of a TiSe2 saturable absorber in the 2 μm wavelength region

• Published in: Nanoscale Vol. 11; no. 46; pp. 22277 - 22285
• Main Authors: Rongfei Wei, Tian, Xiangling, Yang, Lupeng, Yang, Dandan, Ma, Zhijun, Guo, Hai, Qiu, Jianrong
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 14.12.2019
• Subjects: Absorbers; Bleaching; Electrons; Equilibrium; Fiber lasers; Fluence; Nonlinear response; Nonlinearity; Optoelectronic devices; Photonics; Transition metal compounds

The non-equilibrium state of correlated electron materials is crucial for both scientific research and practical applications in optoelectronic and photonic devices. Because of the weak optical nonlinearity of most materials even under a dense optical excitation, it is desirable to achieve a signifi...