Graphene Mode-Locked Ultrafast Laser
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- 作者：Zhipei Sun ; Tawfique Hasan ; Felice Torrisi ; Daniel Popa ; Giulia Privitera ; Fengqiu Wang ; Francesco Bonaccorso ; Denis M. Basko ; Andrea C. Ferrari
- 刊名：ACS Nano
- 出版年：2010
- 出版时间：February 23, 2010
- 年：2010
- 卷：4
- 期：2
- 页码：803-810
- 全文大小：431K
- 年卷期：0
- ISSN：1936-086X
文摘
Graphene is at the center of a significant research effort. Near-ballistic transport at room temperature and high mobility make it a potential material for nanoelectronics. Its electronic and mechanical properties are also ideal for micro- and nanomechanical systems, thin-film transistors, and transparent and conductive composites and electrodes. Here we exploit the optoelectronic properties of graphene to realize an ultrafast laser. A graphene−polymer composite is fabricated using wet-chemistry techniques. Pauli blocking following intense illumination results in saturable absorption, independent of wavelength. This is used to passively mode-lock an erbium-doped fiber laser working at 1559 nm, with a 5.24 nm spectral bandwidth and ∼460 fs pulse duration, paving the way to graphene-based photonics.