Exploring Femtosecond Laser Ablation by Snapshot Ultrafast Imaging and Molecular Dynamics Simulation

Yao, Jinzhong; Qi, Dalong; Liang, Hongtao; He, Yilin; Yao, Yunhua; Jia, Tianqing; Yang, Yongqiang; Sun, Zhenrong; Zhang, Shian

doi:10.34133/2022/9754131

Cited by 25 publications

(6 citation statements)

References 61 publications

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“…It can be related to the adjusted ultrafast-laser parameters leading to the differences in temperature, pressure, and irradiation. [17,32,33] The localized temperature and pressure induced by ultrafast laser have a diverse effect on liquid nanophase separation. The pressure generated inside the glass can reach several even dozens of gigapascal levels with different laser parameters, [23,24] which can facilitate the liquid separation processing.…”

Section: Resultsmentioning

confidence: 99%

Pure Blue Perovskites Nanocrystals in Glass: Ultrafast Laser Direct Writing and Bandgap Tuning

Sun

Tan

et al. 2023

Laser & Photonics Reviews

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Chemical engineering in lead halide perovskite nanocrystals (PNCs) has garnered significant attention for tailoring optoelectronic properties, such as bandgap, quantum yield (QY), and stability. Here, pure blue emissive PNCs in glass by using ultrafast laser are reported. The emission wavelength is tuned in the range from 461 to 520 nm by engineering the chemical composition in the B-site Cd/Pb mix-cation system. The photoluminescence (PL) QY of CsCd x Pb 1−x Br 3 PNCs reaches 13.4% for the pure blue emission at 467 nm, which is twice that of CsPbBr y Cl 3−y PNCs. The pure blue emissive PNCs exhibit remarkable stability when exposed to ultraviolet (UV) radiation, heat, and ethanol solvents. The ultrafast laser print patterns can be encrypted and decrypted for information, which shows great potential for crucial information security applications. These results imply that B-site engineering for lead halide PNCs embedded in glass is effective to tailor the PL spectra and increase the PL QY. The pure blue emissive PNCs hold great potential in the applications of blue and full-color emissive devices.

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Section: Resultsmentioning

confidence: 99%

Pure Blue Perovskites Nanocrystals in Glass: Ultrafast Laser Direct Writing and Bandgap Tuning

Sun

Tan

et al. 2023

Laser & Photonics Reviews

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“…In addition, we can design the new coded aperture to match the H-STAR acquisition method in the future so that the number of channels can be slightly reduced to improve the field of view (FOV) of the entire system. This work will play an important role in the understanding of ultrafast processes such as femtosecond laser–matter interaction, − ultrashort pulse light field measurement, and atomic time scale. H-STAR will be a highly robust and suitable ultrafast imaging technique for studying transient, nonrepetitive events.…”

Section: Discussionmentioning

confidence: 99%

High-Channel Spectral-Temporal Active Recording (H-STAR) for Femtosecond Scenes Observation in a Single-Shot

Meng,

Liu,

Yin

et al. 2024

ACS Photonics

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Ultrafast compressed imaging is promising for capturing a large number of frames and providing single-shot observations of various unknown and important transient scenes. However, this technique often compromises spatial resolution in order to capture ultrafast phenomena with larger frame numbers. In this paper, a high-channel spectral-temporal active recording (H-STAR) is proposed, which achieves both femtosecond-level ultrafast imaging speed and high spatial resolution by substantially increasing the number of imaging channels. H-STAR can realize the highest spatial resolution of 101.6 lp/mm, the highest frame rate of 5.52 trillion frames per second, and the highest frame number of 120. The advantages of H-STAR, including its compact optical structure, high frame rate, large number of frames, and high imaging quality, are demonstrated through the capture of laser-induced plasma dynamics and the twice-reflection of the light spot. H-STAR enables single-shot and precise recording of ultrafast processes with both spatial and temporal complexity.

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“…In contrast, the multiple-shot methods can only collect information from a column (from point scanning) or a slice (from line scanning) of the datacube. 41 Meanwhile, distinguished from single-shot framing (or mapping) photography, 30,34,42 CUP maintains time continuity in data acquisition, which further enhances the amount of acquirable information. 18 Because of its unprecedented imaging ability, CUP immediately became a research focus since its invention.…”

Section: Introductionmentioning

confidence: 99%

Tutorial on compressed ultrafast photography

Lai,

Marquez,

Liang

2024

J. Biomed. Opt.

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. Significance Compressed ultrafast photography (CUP) is currently the world’s fastest single-shot imaging technique. Through the integration of compressed sensing and streak imaging, CUP can capture a transient event in a single camera exposure with imaging speeds from thousands to trillions of frames per second, at micrometer-level spatial resolutions, and in broad sensing spectral ranges. Aim This tutorial aims to provide a comprehensive review of CUP in its fundamental methods, system implementations, biomedical applications, and prospect. Approach A step-by-step guideline to CUP’s forward model and representative image reconstruction algorithms is presented with sample codes and illustrations in Matlab and Python. Then, CUP’s hardware implementation is described with a focus on the representative techniques, advantages, and limitations of the three key components—the spatial encoder, the temporal shearing unit, and the two-dimensional sensor. Furthermore, four representative biomedical applications enabled by CUP are discussed, followed by the prospect of CUP’s technical advancement. Conclusions CUP has emerged as a state-of-the-art ultrafast imaging technology. Its advanced imaging ability and versatility contribute to unprecedented observations and new applications in biomedicine. CUP holds great promise in improving technical specifications and facilitating the investigation of biomedical processes.

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Exploring Femtosecond Laser Ablation by Snapshot Ultrafast Imaging and Molecular Dynamics Simulation

Cited by 25 publications

References 61 publications

Pure Blue Perovskites Nanocrystals in Glass: Ultrafast Laser Direct Writing and Bandgap Tuning

Pure Blue Perovskites Nanocrystals in Glass: Ultrafast Laser Direct Writing and Bandgap Tuning

High-Channel Spectral-Temporal Active Recording (H-STAR) for Femtosecond Scenes Observation in a Single-Shot

Tutorial on compressed ultrafast photography

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