期刊
PHYSICAL REVIEW B
卷 79, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.245134
关键词
electron gas; high-speed optical techniques; optical switches; photonic crystals; time resolved spectra
资金
- DFG [FOR 557, 730]
- BMBF [13N9155, 13N10146]
We study the all-optical switching behavior of one-dimensional metal-dielectric photonic crystals due to the nonlinearity induced by a hot electron gas. A polychromatic pump-probe setup is used to determine the wavelength and pump intensity dependence of the ultrafast transmission suppression as well as the dynamics of the process on a subpicosecond time scale. We find ultrafast (subpicosecond) as well as a slow (millisecond) behavior. We present a model of the ultrafast dynamics and nonlinear response, which can fit the measured data well and allows us to separate the thermal and the electronic response of the system.
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