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Proceedings Paper

Saturable absorption in graphene at 800-nm band
Author(s): Shunbin Lu; Shuqing Chen; Zhiwei Zheng; Han Zhang; Chujun Zhao; Shuangchun Wen
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Paper Abstract

Graphene, due to its linear energy band structure and the Pauli blocking principle, exhibits broadband optical saturable absorption. We experimentally demonstrated the saturable absorption in graphene with different layers at 800 nm. By performing the balanced twin-detector method, we are able to characterize the nonlinear optical property of the as-fabricated different layer graphene samples. Under strong illumination, we find that absorption of graphene decreases with the increase of incident power, and by fitting the experiment data with theoretical model, the saturable intensity and the normalized modulation depth is measured to be 7.911 GW/cm2 and 10.6% in 3 layers sample and 2.77 GW/cm2 and 73.6% in monolayer sample, respectively. The experimental result shows that graphene may be a promising saturable absorber, with the potential laser photonics applications, such as laser mode locker or Q-switcher, at 800 nm band.

Paper Details

Date Published: 13 December 2012
PDF: 6 pages
Proc. SPIE 8555, Optoelectronic Devices and Integration IV, 855512 (13 December 2012); doi: 10.1117/12.999624
Show Author Affiliations
Shunbin Lu, Hunan Univ. (China)
Shuqing Chen, Hunan Univ. (China)
Zhiwei Zheng, Hunan Univ. (China)
Han Zhang, Hunan Univ. (China)
Chujun Zhao, Hunan Univ. (China)
Shuangchun Wen, Hunan Univ. (China)

Published in SPIE Proceedings Vol. 8555:
Optoelectronic Devices and Integration IV
Xuping Zhang; Hai Ming; Joel M. Therrien, Editor(s)

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