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A photonic crystal-based broadband graphene saturable absorber
- Source :
- Optics Letters Vol. 44, Issue 19, pp. 4785-4788 (2019)
- Publication Year :
- 2018
-
Abstract
- The enhanced nonlinear optical response of a one-dimensional (1D) photonic crystal (PC) made from polymers and graphene composites is observed. The graphene PC was fabricated by spin-coating. It shows obvious bandgaps at two wavelengths in transmittance. Femtosecond Z-scan measurement at 515 nm and 1030 nm reveals a distinct enhancement in the effective nonlinear absorption coefficient Beff (and imaginary part of third-order dielectric susceptibility ImX(3)) for graphene nanoflakes embedded in the PC, when compared with the bulk graphene-polymer dispersion. The effect is studied in a wide range of laser intensities. The inclusion of graphene into a 1D-PC remarkably decreases the saturable absorption threshold and saturation intensity, providing a desired solution for an advanced all-optical laser mode-locking device.<br />Comment: 10 pages, 2 figures, 1 table
- Subjects :
- Physics - Optics
Subjects
Details
- Database :
- arXiv
- Journal :
- Optics Letters Vol. 44, Issue 19, pp. 4785-4788 (2019)
- Publication Type :
- Report
- Accession number :
- edsarx.1808.07668
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1364/OL.44.004785