Two-dimensional palladium ditelluride: A novel saturable absorption material for ultrafast fiber lasers

Lu, Haiming; He, Junshan; Hu, Zhiwan; Hu, Xiangxiang; He, Pengfei; Zhao, Yu; Hao, Mingming; Tao, Lili

doi:10.1016/j.infrared.2021.103962

Cited by 10 publications

(4 citation statements)

References 34 publications

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“…The insert loss of SA was calculated to be about 0.95 dB from the above data. Compared with other SAs, the Ge-SA used in our experiment has a larger modulation depth, which is beneficial to compressing the pulse width and achieving stable mode-locked output. − The transmittance at different incident light intensities was fitted by the following equation: T ( I ) = 1 − normalΔ T × exp ( − I / I sat ) − α ns where T ( I ) is the transmittance, α ns is the nonsaturation loss, Δ T is the modulation depth, I is the incident intensity, and I sat is the saturation intensity.…”

Section: Resultsmentioning

confidence: 99%

Generation of Bright–Dark Pulses in Erbium-Doped Fiber Lasers Based on a Germanene-Saturable Absorber

Shi,

Xue,

et al. 2024

ACS Appl. Nano Mater.

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As a group IV graphene-like material, germanene has fast carrier relaxation time and excellent nonlinear saturable absorption properties, which make it have a broad application prospect in the field of optics. However, in the field of laser applications, it has not been sufficiently studied. In this study, the energy band and optical property calculations of germanene with two structural defects were performed based on the density functional theory. The germanene nanosheet prepared by a liquidphase exfoliation method was systematically characterized and analyzed. High-quality germanene-saturable absorbers were selected for application in erbium-doped fiber lasers. By adjusting the device, a bright−dark soliton with a fundamental frequency of 6.28 MHz and a single-pulse energy of 2.58 nJ was obtained. Meanwhile, the dark−dark−bright, dark−bright−dark, and dark−bright−bright solitons were also experimentally observed and characterized. The study shows that germanene nanosheets have excellent nonlinear saturable absorption properties for bright−dark soliton's modulation. It also provides theoretical and experimental bases for the application of germanene in the field of ultrafast lasers.

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Section: Resultsmentioning

confidence: 99%

Generation of Bright–Dark Pulses in Erbium-Doped Fiber Lasers Based on a Germanene-Saturable Absorber

Shi,

Xue,

et al. 2024

ACS Appl. Nano Mater.

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“…Figure 1h shows a typical room‐temperature Raman spectrum taken from the red circle marked area in Figure 1g with two distinguished modes centered around 74.4 cm −1 ( E g , in‐plane) and 132.05 cm −1 ( A 1g , out‐plane). [ 14,16,22 ] The inset displays the diagram description of Te atoms’ motion in the two modes.…”

Section: Resultsmentioning

confidence: 99%

“…[12] Recently, many methods have been developed to synthesize PdTe 2 like molecular beam epitaxy (MBE), [13,14] direct epitaxial growth on the Pd (111) surface via tellurization, [15] slow cooling method, [8] and the ultrasonic liquid exfoliation. [16] Generally, exfoliated flakes ranging from monolayer to several layers have inherent electrical characteristics, purity, and high crystallinity that are useful for particular devices and basic investigations. [5,17] The Bardeen-Cooper-Schrieffer (BCS)-type superconductivity in PdTe 2 is explained by an increase in the e-ph coupling resulting from a van Hove singularity (at the Fermi level).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Electron–Phonon Coupling in Dirac Semimetal PdTe₂ via Temperature‐Dependent Raman Spectroscopy

Al-Makeen

Guo

Wang

et al. 2022

Physica Rapid Research Ltrs

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Layered Palladium ditelluride (PdTe2) is an interesting noble‐transition‐metal dichalcogenide with high electrical and thermal conductivity, exhibiting superconductivity and a type‐II Dirac semimetallic phase due to the increased electron–phonon (e–ph) coupling. Herein, the e–ph coupling constant λ of E g (in‐plane) and A 1g (out‐of‐plane) modes in the exfoliated PdTe2 nanoflakes via temperature‐dependent Raman spectroscopy within the temperature range from 80 to 580 K is determined. Both E g mode with a Gaussian line shape and A 1g mode with a Breit–Wigner–Fano line shape show nonlinear frequency redshift and linewidth broadening with temperature. The extracted e–ph coupling constants are λ E g = 1.54 and λ A 1 g = 0.55, respectively. The Raman results confirm that PdTe2 is a phonon‐mediated Bardeen–Cooper–Schrieffer superconductor.

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“…12,15 Palladium ditelluride (PdTe 2 ) was identified as a promising saturable absorber and utilized in Yb-doped mode-locked fiber lasers. 39,40 Additionally, ultrafast laser pulses with a duration of about 115 fs are generated by inserting the GaTe saturable absorber into an Er-doped fiber laser. 41 As fundamental constituents of TMDCs, metallic MTe 2 (M = V and Ta) possesses superior electrical performance.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast nonlinear optical properties of MTe₂ (M = V and Ta) and their application as broadband saturable absorbers

Zhang,

Li,

Leng

et al. 2024

J. Mater. Chem. C

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Two-dimensional palladium ditelluride: A novel saturable absorption material for ultrafast fiber lasers

Cited by 10 publications

References 34 publications

Generation of Bright–Dark Pulses in Erbium-Doped Fiber Lasers Based on a Germanene-Saturable Absorber

Generation of Bright–Dark Pulses in Erbium-Doped Fiber Lasers Based on a Germanene-Saturable Absorber

Investigation of the Electron–Phonon Coupling in Dirac Semimetal PdTe₂ via Temperature‐Dependent Raman Spectroscopy

Ultrafast nonlinear optical properties of MTe₂ (M = V and Ta) and their application as broadband saturable absorbers

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Two-dimensional palladium ditelluride: A novel saturable absorption material for ultrafast fiber lasers

Cited by 10 publications

References 34 publications

Generation of Bright–Dark Pulses in Erbium-Doped Fiber Lasers Based on a Germanene-Saturable Absorber

Generation of Bright–Dark Pulses in Erbium-Doped Fiber Lasers Based on a Germanene-Saturable Absorber

Investigation of the Electron–Phonon Coupling in Dirac Semimetal PdTe2 via Temperature‐Dependent Raman Spectroscopy

Ultrafast nonlinear optical properties of MTe2 (M = V and Ta) and their application as broadband saturable absorbers

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Product

Resources

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Investigation of the Electron–Phonon Coupling in Dirac Semimetal PdTe₂ via Temperature‐Dependent Raman Spectroscopy

Ultrafast nonlinear optical properties of MTe₂ (M = V and Ta) and their application as broadband saturable absorbers