Abstract
γ-graphyne, a two-dimensional carbon material, has attracted much attention due to its unique characteristics, such as high carrier mobility and high stability. In the present study, a γ-graphyne saturable absorber (SA) was fabricated and characterized. The linear optical absorption in the spectral range from the visible to mid-infrared as well as the nonlinear optical character of the SA were investigated. Passively Q-switched solid-state lasers emitting at 639 nm, 1342 nm and 1932 nm were realized using the γ-graphyne SA. The results indicate that γ-graphyne could be a promising alternative to the rare broadband optical modulator.
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