Open AccessMicrowave and optical saturable absorption in graphene
Author(s) -
Zheng Zhang,
Chujun Zhao,
Shunbin Lu,
Yu Chen,
Ying Li,
Han Zhang,
Shuangchun Wen
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.023201
Subject(s) - saturable absorption , graphene , materials science , microwave , optics , absorption (acoustics) , absorbance , laser , optoelectronics , absorption band , fiber laser , telecommunications , nanotechnology , physics , wavelength , computer science , composite material
We report on the first experiments on saturable absorption in graphene at microwave frequency band. Almost independent of the incident frequency, microwave absorbance of graphene always decreases with increasing the power and reaches at a constant level for power larger than 80 µW, evidencing the microwave saturable absorption property of graphene. Optical saturable absorption of the same graphene sample was also experimentally confirmed by an open-aperture Z-scan technique by one laser at telecommunication band and another pico-second laser at 1053 nm, respectively. Herein, we are able to conclude that graphene is indeed a broadband saturable absorber that can operate at both microwave and optical band.