High-speed femtosecond laser plasmonic lithography and reduction of graphene oxide for anisotropic photoresponse
Tingting Zou,Bo Zhao,Wei Xin,Ye Wang,Bin Wang,Xin Zheng,Hongbo Xie,Zhiyu Zhang,Jianjun Yang,Chunlei Guo,Chunlei Guo +10 more
TLDR
A team of Chinese researchers has used ultrafast femtosecond laser plasmonic lithography (FPL) to create subwavelength grates on GO films 140 nanometres thick, which has, for the first, demonstrated the practical use of FPL for producing structures on two-dimensional films of GO for use in novel devices for applications in optoelectronics.Abstract:
Micro/nanoprocessing of graphene surfaces has attracted significant interest for both science and applications due to its effective modulation of material properties, which, however, is usually restricted by the disadvantages of the current fabrication methods. Here, by exploiting cylindrical focusing of a femtosecond laser on graphene oxide (GO) films, we successfully produce uniform subwavelength grating structures at high speed along with a simultaneous in situ photoreduction process. Strikingly, the well-defined structures feature orientations parallel to the laser polarization and significant robustness against distinct perturbations. The proposed model and simulations reveal that the structure formation is based on the transverse electric (TE) surface plasmons triggered by the gradient reduction of the GO film from its surface to the interior, which eventually results in interference intensity fringes and spatially periodic interactions. Further experiments prove that such a regular structured surface can cause enhanced optical absorption (>20%) and an anisotropic photoresponse (~0.46 ratio) for the reduced GO film. Our work not only provides new insights into understanding the laser-GO interaction but also lays a solid foundation for practical usage of femtosecond laser plasmonic lithography, with the prospect of expansion to other two-dimensional materials for novel device applications.read more
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Quo Vadis LIPSS?—Recent and Future Trends on Laser-Induced Periodic Surface Structures
TL;DR: The footprint of the research area of LIPSS is analyzed on the basis of a detailed literature search, a brief overview on its current trends is provided, the European funding strategies within the Horizon 2020 programme are described, and promising future directions are outlined.
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Bioinspired Soft Robots Based on the Moisture-Responsive Graphene Oxide
Yu-Qing Liu,Zhao-Di Chen,Dong-Dong Han,Jiang-Wei Mao,Jia-Nan Ma,Yong-Lai Zhang,Hong-Bo Sun,Hong-Bo Sun +7 more
TL;DR: Graphene oxide, which has many oxygen functional groups, is a promising candidate for use in moisture‐responsive sensors and actuators due to the strong water–GO interaction and the ultrafast transport of water molecules within the stacked GO sheets.
Journal ArticleDOI
Extremely regular periodic surface structures in a large area efficiently induced on silicon by temporally shaped femtosecond laser
Yuchan Zhang,Jiang Qilin,Kaiqiang Cao,Chen Tianqi,Ke Cheng,Shian Zhang,Donghai Feng,Tianqing Jia,Zhenrong Sun,Jianrong Qiu +9 more
TL;DR: In this article, a temporally shaped femtosecond laser-induced periodic surface structure (LSFL) was fabricated on a silicon surface by using a 4f configuration zero-dispersion pulse shaping system, where a Fourier transform limit (FTL) pulse was shaped into a pulse train with varying intervals in the range of 0.25-16.2
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Graphene-based tunable short band absorber for infrared wavelength
Vishal Sorathiya,Sunil Lavadiya,Lee S Thomas,Mohammed Abd-Elnaby,Ahmed Nabih Zaki Rashed,Mahmoud M. A. Eid +5 more
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Numerical investigation of the tunable polarizer using gold array and graphene metamaterial structure for an infrared frequency range
Vishal Sorathiya,Sunil Lavadiya,Bijrajsinh Parmar,Sudipta Das,Murali Krishna,Osama S. Faragallah,Mohammed Baz,Mahmoud M. A. Eid,Ahmed Nabih Zaki Rashed +8 more
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