Monolayer graphene as a saturable absorber in a mode-locked laser

被引：404

作者：

Bao, Qiaoliang ^{[2
]}

Zhang, Han ^{[1
]}

Ni, Zhenhua ^{[3
]}

Wang, Yu ^{[2
]}

Polavarapu, Lakshminarayana ^{[2
]}

Shen, Zexiang ^{[3
]}

Xu, Qing-Hua ^{[2
]}

Tang, Dingyuan ^{[1
]}

Loh, Kian Ping ^{[2
]}

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

[2] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore

[3] Nanyang Technol Univ, Sch Phys & Math Sci, Singapore 637371, Singapore

来源：

NANO RESEARCH | 2011年 / 4卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

Graphene; saturable absorber; laser; carrier dynamics; ultrafast photonics; ATOMIC-LAYER GRAPHENE; FIBER LASERS; ULTRAFAST PHOTONICS; NORMAL DISPERSION; CARBON NANOTUBES; SPECTROSCOPY; FEMTOSECOND; GRAPHITE; FILMS; LIFETIME;

D O I：

10.1007/s12274-010-0082-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We demonstrate that the intrinsic properties of monolayer graphene allow it to act as a more effective saturable absorber for mode-locking fiber lasers when compared to multilayer graphene. The absorption of monolayer graphene can be saturated at lower excitation intensity compared to multilayer graphene, graphene with wrinkle-like defects, or functionalized graphene. Monolayer graphene has a remarkably large modulation depth of 65.9%, whereas the modulation depth of multilayer graphene is greatly reduced due to nonsaturable absorption and scattering loss. Picosecond ultrafast laser pulses (1.23 ps) can be generated using monolayer graphene as a saturable absorber. Due to the ultrafast relaxation time, larger modulation depth and lower scattering loss of monolayer graphene, it performs better than multilayer graphene in terms of pulse shaping ability, pulse stability, and output energy.

引用

页码：297 / 307

页数：11

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