Controlled stacking of graphene monolayer saturable absorbers for ultrashort pulse generation in erbium-doped fiber lasers

Rosa, Henrique G.; Castañeda, Juan A.; Cruz, Carlos Henrique de Brito; Padilha, Lázaro A.; Gomes, José Carlos Viana; Souza, E. A. Thoroh de; Fragnito, H.L.

doi:10.1364/ome.7.002528

Cited by 17 publications

(2 citation statements)

References 24 publications

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“…In addition, compared with traditional SAs, including semiconductor saturable absorber mirrors or carbon nanotubes, graphene does not require bandgap optimization and diameter or chiral adjustment, thus greatly simplifying the preparation process. With these advantages, graphene and its derivatives, such as graphene oxide, reduced graphene oxide, and graphene composite materials, have been widely developed in mode‐locked fiber lasers, as shown in Table . In terms of the performance of these mode‐locked lasers, some exciting results have been obtained, including minimum pulse‐width, maximum output power, and repetition rates of 29 fs, 520 mW, and 162 GHz, respectively.…”

Section: Versatile Pulsed Lasers Using 2d Layered Materialsmentioning

confidence: 99%

2D Layered Materials: Synthesis, Nonlinear Optical Properties, and Device Applications

Guo

Xiao

Wang

et al. 2019

Laser & Photonics Reviews

407

197

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In recent years, 2D layered materials, including graphene, topological insulators, transition metal dichalcogenides, black phosphorus, MXenes, graphitic carbon nitride, and metal‐organic frameworks, have attracted considerable interest due to their potential applications in the fields of physics, chemistry, biology, and energy. Their rise in the field of nonlinear photonics began around 2009 and has become an important research direction. Here, the synthesis techniques, nonlinear optical properties, integration strategies, and device applications of layered materials are reviewed. In terms of nonlinear optical properties, the focus is on saturable absorption and Kerr nonlinearity. On this basis, their applications in various pulsed lasers, including fiber lasers, solid‐state lasers, waveguide lasers, and related nonlinear optical phenomenon, are summarized. In addition, novel optical devices using layered materials, such as optical modulators, optical polarizers, optical switchers, and even all‐optical device, are also involved. It is believed that the development of 2D layered materials in the field of photonics will continue to deepen, thus laying a good foundation for its practical application.

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Section: Versatile Pulsed Lasers Using 2d Layered Materialsmentioning

confidence: 99%

2D Layered Materials: Synthesis, Nonlinear Optical Properties, and Device Applications

Guo

Xiao

Wang

et al. 2019

Laser & Photonics Reviews

407

197

View full text Add to dashboard Cite

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“…It has been found that there is a good linear relationship between the I (E 2g )/ I (A 1g ) ratio and the number of layers in few‐layered TaSe 2 , MoS 2 , and WSe 2 . It then becomes a reliable strategy to estimate the number of layers of these 2D materials, including graphene . As can be seen in Figure b, the circles represent the I (E 2g )/ I (A 1g ) ratio of few‐layered TaS 2 .…”

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confidence: 97%

Flexible Foil of Hybrid TaS₂/Organic Superlattice: Fabrication and Electrical Properties

Zong

Yoo

Zhang

et al. 2019

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2D transitional metal dichalcogenide (2D-TMDC) materials, as inorganic graphene analogs (IGAs), have been intensively investigated for their novel chemical and physical properties when the thickness is reduced to a few atomic layers, such as MoS 2 , WS 2 , among others. [1] Tantalum disulfide, TaS 2 , one of the TMDC materials, has attracted growing attention recently. In the bulk state, TaS 2 occupies 2H or 1T structure, which is composed of covalently bonded STaS layers. 1T-TaS 2 with Ta in octahedral coordination with S atoms exhibits semiconducting behavior, and it has a commensurate charge density wave (CCDW) phase under 180 K. Adjusted by pressure, the superconductivity of 1T-TaS 2 develops in the CCDW state and survives to very high pressure. [2][3][4] 2H-TaS 2 with Ta in trigonal prismatic coordination with S atoms exhibits metallic behaviors with CDW phase transition (T CDW = 75 K) and superconductivity (T c = 0.8 K). [5][6][7][8] The electrical conductivity of single-crystal 2H-TaS 2 can reach 6.8 × 10 4 S m −1 at room temperature. [9] When the thickness is reduced to a few layers, interesting phenomena have been found, such as gate-tunable phase transition [10] and enhanced superconductivity, [11] which are promising properties for applications like electrical oscillators, [12] fast memories, [13] hydrogen evolution catalyst. [14] Until now, 2D TaS 2 has been mainly synthesized by the mechanical exfoliation method, [15] which is time consuming and of poor reproductivity and low yield. It has been noticed that the exfoliation of TaS 2 seems rather difficult and the atomically thin layers are unstable in ambient environments due to easy oxidation. [16] Complex encapsulation techniques are therefore required to help preserve the samples in air. [16] The chemical vapor deposition method [17] proves to be swift and effective in fabrication of high-quality 2D materials, but large-area synthesis of full-coverage atomically thin material is still in progress. For device applications, solution-based chemical synthesis is particularly important, as the product can be easily integrated into electronic devices.There is a new solution-based strategy to synthesize 2D materials in the form of inorganic/organic superlattice, in which the inorganic layers may get close to the low-dimensional state due to the spatial separation by the organic molecules. In our previous papers, we synthesized a hybrid superlattice with alternating 2D [TiS 2 ] monolayers and organic cations through an electrochemical reaction process. [18] The isolation of the [TiS 2 ] TaS 2 nanolayers with reduced dimensionality show interesting physics, such as a gate-tunable phase transition and enhanced superconductivity, among others. Here, a solution-based strategy to fabricate a large-area foil of hybrid TaS 2 /organic superlattice, where [TaS 2 ] monolayers and organic molecules alternatively stack in atomic scale, is proposed. The [TaS 2 ] layers are spatially isolated with remarkably weakened interlayer bonding, resulting in lattice vibration ...

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Saturable Absorption in 2D Nanomaterials and Related Photonic Devices

Wang

Baker‐Murray

Blau

2019

Laser & Photonics Reviews

134

104

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Wide-spectral saturable absorption (SA) has been experimentally demonstrated in two-dimensional (2D) nanomaterials with outstanding performance, such as low saturation intensity, deep modulation depth, and fast recovery time of excited carriers. Hence, 2D nanomaterials can be utilized as saturable absorbers for mode-locking or Q-switching to generate laser pulses with short duration and high repetition rate. Here, the SA properties of graphene, layered transition metal dichalcogenides, Group-V elements, and other 2D nanomaterials are reviewed by summarizing their slow-or fastsaturable absorption behavior using the modified Frantz-Nodvik model or the steady-state solution of Hercher's rate equations. The dependence of SA in 2D nanomaterials on excitation wavelength, linear absorption coefficient, and pulse duration is also explained. Finally, the applications of these 2D nanomaterials in a range of pulsed lasers are summarized. Figure 2. a-c) Schemes showing the principle of open-aperture (a), closed-aperture Z-scans (b), and I-scan (c).

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Controlled stacking of graphene monolayer saturable absorbers for ultrashort pulse generation in erbium-doped fiber lasers

Cited by 17 publications

References 24 publications

2D Layered Materials: Synthesis, Nonlinear Optical Properties, and Device Applications

2D Layered Materials: Synthesis, Nonlinear Optical Properties, and Device Applications

Flexible Foil of Hybrid TaS₂/Organic Superlattice: Fabrication and Electrical Properties

Saturable Absorption in 2D Nanomaterials and Related Photonic Devices

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Controlled stacking of graphene monolayer saturable absorbers for ultrashort pulse generation in erbium-doped fiber lasers

Cited by 17 publications

References 24 publications

2D Layered Materials: Synthesis, Nonlinear Optical Properties, and Device Applications

2D Layered Materials: Synthesis, Nonlinear Optical Properties, and Device Applications

Flexible Foil of Hybrid TaS2/Organic Superlattice: Fabrication and Electrical Properties

Saturable Absorption in 2D Nanomaterials and Related Photonic Devices

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Flexible Foil of Hybrid TaS₂/Organic Superlattice: Fabrication and Electrical Properties