Abstract
We systematically investigate ultrafast dynamic nonlinear mechanisms of photonic crystals (PhCs) with femtosecond (fs) pumping via the transmission change of a signal pulse. The pumping causes a nonlinear decrease (or increase) in the dielectric constant of the PhC material. A new phenomenon of the asymmetric change in the transmission spectra was observed in the gap region and the band-gap edge modes. For the band region, a sloped change in the transmission spectra was observed, and for the transition region, a hybrid of the two was observed. In addition, a universal dynamic picture of the fs nonlinear responses of the PhC was constructed.
© 2021 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Yushen Dou, Xueyang Shi, and Xunya Jiang
Opt. Express 27(24) 35710-35718 (2019)
Rukang Li
J. Opt. Soc. Am. B 38(6) 1990-1996 (2021)
Stefan Scholz, Ortwin Hess, and Roland Rühle
Opt. Express 3(1) 28-34 (1998)