Photonics Research, 2018, 6 (6): 06000554, Published Online: Jul. 2, 2018
Ultrafast optical nonlinearity of blue-emitting perovskite nanocrystals Download: 560次
Abstract
Perovskite nanocrystals (NCs) have strong nonlinear optical responses with a number of potential applications, ranging from upconverted blue-lasing to the tagging of specific cellular components in multicolor fluorescence microscopy. Here, we determine the one-photon linear absorption cross section of two kinds of blue-emitting perovskite NCs, i.e., CsPbCl 3 and CsPb ( Cl 0.53 Br 0.47 ) 3 , by utilizing femtosecond transient absorption spectroscopy. The wavelength-dependent nonlinear refraction and two-photon absorption have been measured at wavelengths from 620 to 720 nm by performing Z-scan measurements. The nonlinear optical responses of CsPb ( Cl 0.53 Br 0.47 ) 3 are much more pronounced than those of CsPbCl 3 due to the larger structural destabilization of the former.
Junzi Li, Can Ren, Xin Qiu, Xiaodong Lin, Rui Chen, Cheng Yin, Tingchao He. Ultrafast optical nonlinearity of blue-emitting perovskite nanocrystals[J]. Photonics Research, 2018, 6(6): 06000554.