Saturable absorption behavior of free-standing graphene polymer composite films over broad wavelength and time ranges

Feng, Yi‐Si; Dong, Ningning; Wang, Gaozhong; Li, Yuanxin; Zhang, Saifeng; Wang, Kangpeng; Zhang, Long; Blau, Werner J.; Wang, Jun

doi:10.1364/oe.23.000559

Cited by 69 publications

(52 citation statements)

References 46 publications

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“…All samples were tested in quartz cuvettes with 1 mm pathlength. The precision of this system was confirmed by our previous measurements of graphene/PVA films, MoS 2 nanoflake dispersions and WS 2 films [24][25][26][27]. For example, the figure of merit (FOM) = |Imχ (3) /α 0 | of graphene/PVA films was about (9.3 ± 4.4) × 10 −15 esu cm, in a good agreement with the reported result of ∼5.0 × 10 −15 esu cm [28].…”

Section: Methodssupporting

confidence: 87%

Size-dependent saturable absorption and mode-locking of dispersed black phosphorus nanosheets

Zhang

Wang

et al. 2016

Opt. Mater. Express

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Size dependence of the saturable absorption (SA) property for black phosphorus (BP) was investigated. Three types of BP dispersions with different sizes were prepared using the liquid phase exfoliation method. By fitting the Z-scan data with the analytical solution of the propagation equation, the SA coefficients NL α and the imaginary part of the third order optical susceptibility (3) Im χ are compared at two specific wavelengths, one above the bandgap of the BP monolayer at 515 nm and another between the bandgaps of the monolayer and bulk at 1030 nm. A figure of merit (FOM, |Imχ (3) /α 0 |, α 0 linear absorption) was employed to assess the SA performance of the three different dispersions. The FOM, about (2.1 ± 0.3) × 10 −14 esu cm at 515 nm, hardly depends on the size and hence the layer number of the dispersed BP nanosheets, whereas that at 1030 nm decreases from (1.14 ± 0.20) × 10 −14 to (0.50 ± 0.02) × 10 −14 esu cm when the size of the nanosheets becomes smaller. Zhang, G. S. Duesberg, and J. Wang, "Direct observation of degenerate two-photon absorption and its saturation in WS 2 and MoS 2 monolayer and few-layer films," ACS Nano 9(7), 7142-7150 (2015). 26. K. Wang, Y. Feng, C. Chang, J. Zhan, C. Wang, Q. Zhao, J. N. Coleman, L. Zhang, W. J. Blau, and J. Wang, "Broadband ultrafast nonlinear absorption and nonlinear refraction of layered molybdenum dichalcogenide

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Section: Methodssupporting

confidence: 87%

Size-dependent saturable absorption and mode-locking of dispersed black phosphorus nanosheets

Zhang

Wang

et al. 2016

Opt. Mater. Express

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“…The measured saturation intensity is low when compared to the reported values in various spectral ranges, especially at visible range [47][48][49][50][51][52][53][54]. However, it is comparable with the theoretical value [55].…”

Section: Nonlinear Optical Characterizationsupporting

confidence: 56%

Nonlinear optical absorption and asymmetric charge carrier conduction in chemical vapor deposited single-layer graphene

Thomas

Nalini

Jayaraj

et al. 2020

Mater. Res. Express

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In this work, we report the nonlinear optical absorption and asymmetric charge carrier conduction in single layer graphene films deposited by chemical vapor deposition (CVD) technique on copper foils with pretreated surface. XRD texture and pole figure analysis of the substrate are utilized for the visualization of the effect of the pretreatment on the substrate. The synthesised graphene is employed as a channel layer in a back gated field-effect transistor and the asymmetric behavior of charge carriers is analyzed. Nonlinear optical response of graphene is recorded after transferring it onto a quartz substrate. Open aperture Z-scan technique yields a nonlinear absorption coefficient of 5.34×10 6 cm GW −1 . The film exhibits saturable absorption in the visible range with a saturation intensity as low as 0.134 GW cm −2 .

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“…Figure b shows the open Z‐scan measurement of several 2D materials . According to the NLO theory, light attenuation of propagating through a NLO material can be described as follows:

\frac{d I}{d z^{'}} = - α (I) I

where I is the incident laser intensity, z’ is the propagating distance in the material, and α ( I ) is the total absorption coefficient, which including linear and nonlinear absorption processes and can be described as

α (I) = α_{0} + β_{normaleff} I

where α 0 and β eff are the linear and nonlinear absorption coefficients, respectively.…”

Section: Mechanism Of the Saturable Absorption Effect Of 2d Materialsmentioning

confidence: 99%

Recent Progress in 2D Material‐Based Saturable Absorbers for All Solid‐State Pulsed Bulk Lasers

Zhang

Liu

Wang

et al. 2019

Laser & Photonics Reviews

141

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All solid‐state pulsed lasers (ASSPLs) play a significant role in the fields of medical, military, industry, and scientific research. Passive Q‐switching and mode‐locking are two of the most effective techniques for generating ASSPLs, in which a saturable absorber (SA) is the key element that has great impact on laser output parameters. Recently, 2D layered materials have been widely studied due to their intriguing properties. Their advantages of ultrafast dynamic processing, excellent nonlinear optical response, broadband operation, and easy fabrication and integration with lasers, enable them to be excellent SAs. Herein, the recent progress of ASSPLs with 2D layered material‐based SAs is reviewed, including a brief introduction of the fundamental characteristics, fabrication methods, characterization techniques of ultrafast dynamics, and nonlinear optical properties of 2D materials, design criteria of passively Q‐switched and mode‐locked bulk lasers, and their applications in ASSPLs. Finally, the potential developments and perspectives on 2D material‐based ASSPLs are also highlighted.

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Saturable absorption behavior of free-standing graphene polymer composite films over broad wavelength and time ranges

Cited by 69 publications

References 46 publications

Size-dependent saturable absorption and mode-locking of dispersed black phosphorus nanosheets

Size-dependent saturable absorption and mode-locking of dispersed black phosphorus nanosheets

Nonlinear optical absorption and asymmetric charge carrier conduction in chemical vapor deposited single-layer graphene

Recent Progress in 2D Material‐Based Saturable Absorbers for All Solid‐State Pulsed Bulk Lasers

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