Efficiency enhancement by transient electron dynamic control in shaped femtosecond laser fabrication of metals

Zhan, Ningwei; Jia, Jinhua; Guo, Baoping; Jiang, Lan; Wang, Lifei; Zhang, Qiang

doi:10.1016/j.apsusc.2022.154441

Cited by 3 publications

(1 citation statement)

References 29 publications

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“…Ultrafast science is an important aspect of modern scientific research that involves exploring the dynamic behaviors of microscopic particles 1–5 and developing strategies 6–12 to elucidate these behaviors through ultrahigh spatial and temporal resolution. This technique allows researchers to understand, apply, and control the related physics, 13–15 chemistry, 16,17 and other macroscopic phenomena 18–20 of these particles.…”

Section: Introductionmentioning

confidence: 99%

Probing electron and lattice dynamics by ultrafast electron microscopy: Principles and applications

Lian,

Sun,

Jiang

2023

Int Journal of Mech Sys Dyn

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Microscale charge and energy transfer is an ultrafast process that can determine the photoelectrochemical performance of devices. However, nonlinear and nonequilibrium properties hinder our understanding of ultrafast processes; thus, the direct imaging strategy has become an effective means to uncover ultrafast charge and energy transfer processes. Due to diffraction limits of optical imaging, the obtained optical image has insufficient spatial resolution. Therefore, electron beam imaging combined with a pulse laser showing high spatial–temporal resolution has become a popular area of research, and numerous breakthroughs have been achieved in recent years. In this review, we cover three typical ultrafast electron beam imaging techniques, namely, time‐resolved photoemission electron microscopy, scanning ultrafast electron microscopy, and ultrafast transmission electron microscopy, in addition to the principles and characteristics of these three techniques. Some outstanding results related to photon–electron interactions, charge carrier transport and relaxation, electron–lattice coupling, and lattice oscillation are also reviewed. In summary, ultrafast electron beam imaging with high spatial–temporal resolution and multidimensional imaging abilities can promote the fundamental understanding of physics, chemistry, and optics, as well as guide the development of advanced semiconductors and electronics.

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Section: Introductionmentioning

confidence: 99%

Probing electron and lattice dynamics by ultrafast electron microscopy: Principles and applications

Lian,

Sun,

Jiang

2023

Int Journal of Mech Sys Dyn

Self Cite

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High‐Efficiency Targeted Gene Transfection of Cells Using Temporal and Spatial Shaping Femtosecond Laser Irradiation

Guo,

Song

2024

Journal of Biophotonics

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Laser‐irradiation‐assisted cell gene transfection is sterile and nontoxic, but the low transfection efficiency cannot meet the application requirements. To improve the efficiency, a temporal and spatial shaping method of a femtosecond laser is proposed. Using the time shaping method, we can segment the pulse into subpulses of varying energies and with a defined delay, thereby influencing the interaction between electrons and photons, ultimately enhancing transfection efficiency. The transfection efficiency is further improved by spatially shaping the laser pulse to extend the focusing beam's working distance and reduce the cell's sensitivity to the focal position. Through the characterization of the viability and transfection efficiency of HEK‐293T cells, the method achieved efficient and active transfection, with a maximum transfection efficiency of 45.1% and a cell survival rate of 93.6%. This method provides key technical support for femtosecond laser transfection and promotes its further application in clinical practice.

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Coupling effect of evaporation-plasma shielding and its influence on femtosecond laser ablation

He,

Yang,

Zhang

et al. 2024

Appl. Phys. A

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Efficiency enhancement by transient electron dynamic control in shaped femtosecond laser fabrication of metals

Cited by 3 publications

References 29 publications

Probing electron and lattice dynamics by ultrafast electron microscopy: Principles and applications

Probing electron and lattice dynamics by ultrafast electron microscopy: Principles and applications

High‐Efficiency Targeted Gene Transfection of Cells Using Temporal and Spatial Shaping Femtosecond Laser Irradiation

Coupling effect of evaporation-plasma shielding and its influence on femtosecond laser ablation

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