Excellent nonlinear absorption properties of β-antimonene nanosheets

Zhang, Fang; Wang, Mengxia; Wang, Zhengping; Han, Kezhen; Liu, Xiaojuan; Xu, Xinguang

doi:10.1039/c8tc00306h

Cited by 44 publications

(22 citation statements)

References 42 publications

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“…The Raman spectra obtained for Sb and Sb 2 Te 3 are presented in Figure A,B. In the Raman spectrum of the Sb bulk crystal (Figure A), two bands at 117 and 153 cm −1 belonging to E g in‐plane and A 1g out‐of‐plane vibrational modes were detected . In contrast, in the spectra of the sheets, a loss in the vibrational modes in the above‐mentioned regions was observed.…”

Section: Resultsmentioning

confidence: 96%

“…Layered rhombohedral antimony (Sb) has the particularity to be in the middle of the pnictogens (group 5A) exhibiting semimetallic character. In contrast with orthorhombic black phosphorus (BP), Sb does not possess true van der Waals interactions between individual layers, and is more stable under ambient conditions and still conserves high charge mobility . The Sb exfoliation to obtain antimonene is now in the spotlight because its sheets are expected to present low thermal conductance, semiconducting character and tunable bandgap from 0 to 2.28 eV, which is suitable for optoelectronic applications .…”

Section: Introductionmentioning

confidence: 99%

“…Compared to Sb 2 Te 3 , with higher interlayer distances and weaker interactions, there are not many exfoliation works reported too. High‐quality sheets of Sb and Sb 2 Te 3 have been obtained by epitaxial growth, mechanical and/or liquid‐phase exfoliation methods.…”

Section: Introductionmentioning

confidence: 99%

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Towards Antimonene and 2D Antimony Telluride through Electrochemical Exfoliation

Marzo

Gusmão

Sofer

et al. 2020

Chemistry A European J

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Two-dimensional (2D) layered antimony (Sb) and antimony telluride (Sb 2 Te 3 )a re two valuable materials for optoelectronic devices and thermoelectric applications. Preparing high-quality sheets of thesem aterials is the initial phase to promotet heir expected issues. Herein, micrometer-sized few-to-multilayered sheetso fS ba nd Sb 2 Te 3 have been obtained by electrochemical exfoliation. The layered rhombo-hedralS bw as exfoliated in Na 2 SO 4 and Li 2 SO 4 electrolytes by anodic-cationic intercalation, and Sb 2 Te 3 was exfoliated in Na 2 SO 4 .T hese findings are important contributions for the solution-based room-temperature electrochemical exfoliation, whichi ss table under glove-box-free conditions, to further improve the productiono fh igh-quality exfoliated sheets. exfoliated switchingv oltage in 4and 10 min. In the insert the height profilesa long the x axis of some selected sheets.

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Towards Antimonene and 2D Antimony Telluride through Electrochemical Exfoliation

Marzo

Gusmão

Sofer

et al. 2020

Chemistry A European J

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“…From Figure 13a, it can be seen that antimonene showed the typical SA response, and the achieved saturable intensity and modulation depth are 14.25 GW/cm 2 and 3.96% at 800 nm and 15.10 GW/cm 2 and 19.72% at 1500 nm. However, the RSA response of antimonene was observed by Xu et al for the first time [100]. When the pulse energy was above 7.43 μJ excitation at 1064 nm, the…”

Section: Antimonenementioning

confidence: 94%

Recent Progress in Two-Dimensional Nanomaterials for Laser Protection

2019

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The Nobel Prize in Physics 2018, “For groundbreaking inventions in the field of laser physics”, went to Arthur Ashkin and Gérard Mourou and Donna Strickland. Their inventions have revolutionized laser physics and greatly promoted the development of laser instruments, which have penetrated into many aspects of people’s daily lives. However, for the purpose of protecting human eyes or optical instruments from being damaged by both pulsed and continuous wave laser radiation, the research on laser protective materials is of particular significance. Due to the intriguing and outstanding physical, chemical, and structural properties, two-dimensional (2D) nanomaterials have been extensively studied as optical limiting (OL) materials owing to their broadband nonlinear optical (NLO) response and fast carrier relaxation dynamics that are important for reducing the laser intensity. This review systematically describes the OL mechanisms and the recent progress in 2D nanomaterials for laser protection.

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“…We summarize the NLA parameters of the CrOCl crystal and other typical 2D SA materials (graphene, BP QDs, MoS 2 , N‐G, g‐C 3 N 4 , and β‐Sb) that used similar experimental conditions (a nanosecond laser and a picosecond laser) in Table . For nanosecond laser excitation, compared to graphene, BP QDs, and MoS 2 , the CrOCl crystal exhibits a larger nonlinear absorption coefficient β for a comparable saturation intensity I s at 1.06 µm.…”

Section: Nla Parameters Of Crocl and Other Typical 2d Sa Materialsmentioning

confidence: 99%

Broadband CrOCl Saturable Absorber with a Spectral Region Extension to 10.6 µm

Wang

Zhang

Wang

et al. 2019

Advanced Optical Materials

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Many studies have focused on NLO materials that are used in highpower pulsed lasers in the ultraviolet, visible, and near-infrared (IR) spectral ranges. Constrained by the currently available mid-IR NLO materials, mid-IR pulsed lasers with a wavelength range from 2.5 to 20 µm are underdeveloped. [5,6] NLO materials with saturable absorption properties are often used as the SAs of passively Q-switched lasers and modelocked lasers. Saturable absorption is one kind of NLO effect induced by the imaginary part of the complex third-order susceptibility. The saturable absorber (SA), which is the key component of a pulsed laser, is used to generate a high-energy pulse according to the material's saturable absorption characteristics. Traditional SAs are mainly divided into two categories: ion-doped crystals, such as chromium (Cr)-doped yttrium aluminum garnet (Cr:YAG) crystals or ceramics, and semiconductor saturable absorber mirrors. However, traditional SAs have the disadvantages of a complex preparation process, wavelength sensitivity, and a narrow modulation bandwidth. [7][8][9][10] In recent years, many new SAs were reported and demonstrated, including polarizer [11] and various 2D materials. [12,13] Benefiting from an adjustable bandgap, broadband transmittance, large nonlinearity, high carrier density and mobility, 2D SAs such as graphene, [14,15] black phosphorus, [16,17] topological insulators, [18,19] and transition metal dichalcogenides [20] have attracted attention in materials and optics research. However, the low laser damaged threshold (LDT) and uneven quality of 2D SAs greatly limit their application in the field of high-power solidstate lasers. In addition, the lack of scalable, reliable synthesis methods for 2D materials is a significant impediment that needs to be addressed. Hence, it is necessary and urgent to study new ultra-wideband NLO materials with excellent performance, especially over the wide range of IR bands. Ideal IR NLO materials should possess a wide range of transmission bands, strong NLO effects, and a high LDT. [21,22] Cr-ion-doped crystals play important roles in laser modulation. The valence states of Cr ions mainly include Cr 2+ , Cr 3+ , Cr 4+ , and Cr 5+ . The most common Cr 4+ -ion-doped crystals are typical SA materials for producing pulsed lasers near 1 µm in passively Q-switched and mode-locked lasers. For example, a dual-wavelength pulsed laser was achieved at 1.06 and 1.33 µm with a Nd:GdVO 4 laser using a Cr 4+ :YAG SA in 2016. [23] Crystals doped with Cr ions of other valences (Cr 2+ and Cr 5+ ) Nonlinear optical (NLO) materials with saturable absorption have attracted increasing attention because of their broad applications in the fields of optical communication, materials processing, biological detection, and surgery. However, their development is limited in the mid-infrared (IR) range due to a lack of available materials with a wideband NLO response. Herein, the optical properties and applications of the transition metal oxychloride CrOCl, which has a broadband transpare...

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Excellent nonlinear absorption properties of β-antimonene nanosheets

Cited by 44 publications

References 42 publications

Towards Antimonene and 2D Antimony Telluride through Electrochemical Exfoliation

Towards Antimonene and 2D Antimony Telluride through Electrochemical Exfoliation

Recent Progress in Two-Dimensional Nanomaterials for Laser Protection

Broadband CrOCl Saturable Absorber with a Spectral Region Extension to 10.6 µm

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