Femtosecond pump-probe studies of reduced graphene oxide thin films

Ruzicka, Brian A.; Werake, Lalani K.; Zhao, Hui; Wang, Shuai; Loh, Kian Ping

doi:10.1063/1.3421541

Cited by 64 publications

(73 citation statements)

References 21 publications

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“…In addition to polarization control, mechanical stretching of the fiber is also used to maintain an optimum cavity length while achieving initial mode-locking. Note that the value of normal dispersion of the cavity is in the range of passive mode-locking, as reported by a number of experimental studies [29][30][31][32][33].…”

supporting

confidence: 60%

Blue-Shifted Rogue Waves Generation in Normal Dispersion Fiber Laser

Afzal

Alameh

Lee

2015

IEEE Photon. Technol. Lett.

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In the presence of noise in normal dispersion fiber mode-locked lasers, "dissipative resonance" disappears, which leads to instability of spectral broadening and makes the asymptotic accumulation of energy impossible. We experimentally generate dissipative soliton molecules-like spectral peaks and rogue waves in the frequency domain in a self-mode-locked fiber laser. Due to noise in the initial triangular-shaped mode locked wave, these molecules are arranged in the form of lobes on the longer wavelength side, thus forming three virtual groups of soliton molecules. Further dissipative accumulation of power in the mode-locked wave ultimately leads to the formation of a blue-shifted group of three rogue waves, due to the effective fusion of adjacent soliton molecules. This is the first report of an experimental observation of blue-shifted and three rogue waves in a single experiment. The results have far reaching implications for experimentation with soliton collisions, optical rogue waves, and understanding of hydrodynamics.Index Terms-Passive mode-lock fiber lasers, normal dispersion, instability of dissipative soliton resonance, bound solitons, supercontinuum, rogue waves.

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supporting

confidence: 60%

Blue-Shifted Rogue Waves Generation in Normal Dispersion Fiber Laser

Afzal

Alameh

Lee

2015

IEEE Photon. Technol. Lett.

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“…TA imaging has been developed for visualizing single nanomaterials, such as gold nanoparticles3435, nanowires36, semiconductor and meta nanostructures3738, single-walled carbon nanotubes394041. Recently, TA spectroscopy and imaging have been employed to study the carrier dynamics in graphene4243 and graphene oxide4445 with limited sensitivity.…”

mentioning

confidence: 99%

Highly sensitive transient absorption imaging of graphene and graphene oxide in living cells and circulating blood

Zhang

Chung

et al. 2015

Sci Rep

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We report a transient absorption (TA) imaging method for fast visualization and quantitative layer analysis of graphene and GO. Forward and backward imaging of graphene on various substrates under ambient condition was imaged with a speed of 2 μs per pixel. The TA intensity linearly increased with the layer number of graphene. Real-time TA imaging of GO in vitro with capability of quantitative analysis of intracellular concentration and ex vivo in circulating blood were demonstrated. These results suggest that TA microscopy is a valid tool for the study of graphene based materials.

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“…[5][6][7] However, it is known that the solubility and/or processability are the first issue for many perspective applications of graphene-based materials. 1 For example, the ultrafast carrier dynamics, combined with large absorption and Pauli blocking, make graphene an ideal ultrabroadband and fast saturable absorber in the application of ultrafast laser.…”

mentioning

confidence: 99%

Ultrafast carrier dynamics and saturable absorption of solution-processable few-layered graphene oxide

Zhao

Liu

Yan

et al. 2011

Applied Physics Letters

160

113

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Ultrafast carrier dynamics and saturable absorption of few-layered graphene oxide, well-dispersed in organic solvent, are studied using femtosecond pump-probe and Z-scan techniques. The results demonstrate that few-layered graphene oxide has a fast energy relaxation of hot carriers and strong saturable absorption, which is comparable with that of reduced graphene oxide. Fast carrier relaxation combined with well solution processing capability arises from the large fraction of sp2 carbon atom inside the few-layered graphene oxide sheet together with oxidation mainly existing at the edge areas. This superiority of few-layered graphene oxide will facilitate potential applications of graphene for ultrafast photonics.

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Femtosecond pump-probe studies of reduced graphene oxide thin films

Abstract: Articles you may be interested inLaser direct patterning of a reduced-graphene oxide transparent circuit on a graphene oxide thin film

Cited by 64 publications

References 21 publications

Blue-Shifted Rogue Waves Generation in Normal Dispersion Fiber Laser

Blue-Shifted Rogue Waves Generation in Normal Dispersion Fiber Laser

Highly sensitive transient absorption imaging of graphene and graphene oxide in living cells and circulating blood

Ultrafast carrier dynamics and saturable absorption of solution-processable few-layered graphene oxide

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