材料科学
光电子学
带隙
二硒醚
非线性光学
非线性光学
红外线的
非线性系统
图层(电子)
紫外线
吸收(声学)
光学
纳米技术
激光器
物理
复合材料
硒
冶金
量子力学
作者
Juan Yu,Xiaofei Kuang,Junzi Li,Jiahong Zhong,Cheng Zeng,Lingkai Cao,Zongwen Liu,Zhouxiaosong Zeng,Ziyu Luo,Tingchao He,Anlian Pan,Yanping Liu
标识
DOI:10.1038/s41467-021-21267-4
摘要
Abstract Nonlinear optical effects in layered two-dimensional transition metal chalcogenides have been extensively explored recently because of the promising prospect of the nonlinear optical effects for various optoelectronic applications. However, these materials possess sizable bandgaps ranging from visible to ultraviolet region, so the investigation of narrow-bandgap materials remains deficient. Here, we report our comprehensive study on the nonlinear optical processes in palladium diselenide (PdSe 2 ) that has a near-infrared bandgap. Interestingly, this material exhibits a unique thickness-dependent second harmonic generation feature, which is in contrast to other transition metal chalcogenides. Furthermore, the two-photon absorption coefficients of 1–3 layer PdSe 2 ( β ~ 4.16 × 10 5 , 2.58 × 10 5 , and 1.51 × 10 5 cm GW −1 ) are larger by two and three orders of magnitude than that of the conventional two-dimensional materials, and giant modulation depths ( α s ~ 32%, 27%, and 24%) were obtained in 1–3 layer PdSe 2 . Such unique nonlinear optical characteristics make PdSe 2 a potential candidate for technological innovations in nonlinear optoelectronic devices.
科研通智能强力驱动
Strongly Powered by AbleSci AI