Article
Materials Science, Ceramics
J. Wang, D. G. Wang, X. T. Li, J. Q. Zhai, G. X. Lu, C. Z. Chen
Summary: In this study, beta-tricalcium phosphate (β-TCP)/ZrO2 composite films were prepared using pulsed laser deposition technology, and the effects of different laser fluences on the properties of the films were investigated. The results showed that increasing the laser fluence resulted in an increase in the number of particles and droplets on the film surface, as well as an improvement in crystallinity. Properly increasing the laser fluence can lead to the formation of composite films with high crystallinity, good mechanical properties, and biocompatibility.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Multidisciplinary
Jihoon Jeong, Xun Li, Sangyeop Lee, Li Shi, Yaguo Wang
Summary: The study reports experimental results on heat-pulse propagation in graphite, revealing transient lattice cooling in graphite at specific temperature range. Although different from previous studies on phonon transport in graphite, the observation is consistent with hydrodynamic phonon transport theory and prior heat-pulse measurements in a homogeneous solid.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Zbynek Hubka, Roman Antipenkov, Robert Boge, Emily Erdman, Michael Greco, Jonathan T. Green, Martin Horacek, Karel Majer, Tomas Mazanec, Petr Mazurek, Jack A. Naylon, Jakub Novak, Vaclav Sobr, Petr Strkula, Murat Torun, Boguslaw Tykalewicz, Pavel Bakule, Bedrich Rus
Summary: This research presents a 1 kHz, 515 nm laser system based on commercially available equipment, developed for pumping the OPCPA stage of the Allegra laser system, with a series of techniques employed to ensure stability and high efficiency.
Article
Optics
Zijian Cui, Mingying Sun, DE'An Liu, Jianqiang Zhu
Summary: This study presents high-peak-power picosecond deep-UV laser sources and characterizes typical birefringent and nonlinear borate crystals. The demonstrated results contribute to the development of ultrahigh-peak-power deep-UV and vacuum-UV laser sources as well as important applications in high-energy-density physics, material science, and laser machining.
Article
Optics
Mikhail N. Polyanskiy, Marcus Babzien, Igor Pogorelsky, Rotem Kupfer, Konstantin L. Vodopyanov, Mark A. Palmer
Summary: A new method was developed to measure the nonlinear refractive index of air by analyzing the spatial shape evolution of a laser beam. The study also reported the first measurement of the nonlinear refractive index of air for a very short LWIR laser pulse, showing a 40% lower value compared to a previous measurement with longer pulses.
Article
Optics
Muhammad Ghawas, Valerian Freysz, Lukas Mueller, Sebastien Cassagnere, Eric Freysz
Summary: An all-normal dispersion ytterbium rod-type fiber laser oscillator has been designed, which delivers continuously tunable picosecond pulses. The central wavelength and pulse duration of the pulses can be adjusted by manipulating the position and width of a spectral bandwidth filter.
Article
Materials Science, Multidisciplinary
Ping-Han Wu, Hong-Tsu Young, Kuan-Ming Li
Summary: This study discussed the ablation thresholds of picosecond laser dual pulses in fused silica with different temporal separations. The results indicated that the lowest damage threshold of the dual-pulse ablation was at a temporal separation of 100 ps, and the energy ratios of two sub-pulses were optimized to minimize the thresholds. The study also revealed that the first sub-pulses excited the electrons of the fused silica and induced free-electron shielding and self-trapped exciton seed generation, which affected the material absorption of the second sub-pulses.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Jun Shi, Meiping Zhu, Wenyun DU, Tianbao Liu, Li Zhou, Youen Jiang, Jian Sun, Jingping LI, Jianda Shao
Summary: The performance of a mixture-based picosecond laser mirror (MPLM) coating, especially the picosecond laser-induced damage threshold (LIDT), is investigated. Two types of 1053 nm picosecond laser mirror coatings are studied: MPLM coating consisting of HfO2-Al2O3 mixture and SiO2, and traditional picosecond laser mirror (TPLM) coating consisting of HfO2 and SiO2. Comparative analysis reveals that the MPLM coating has approximately 1.2 times higher ps-LIDT compared to the TPLM coating for an 8 ps laser pulse at 1053 nm wavelength in both atmosphere and vacuum environments. The enhanced LIDT in the MPLM coating may be attributed to lower laser-induced temperature rise.
OPTICAL MATERIALS EXPRESS
(2023)
Article
Optics
Bingnan Shi, Jiatong Li, Shuai Ye, Hongkun Nie, Kejian Yang, Jingliang He, Tao Li, Baitao Zhang
Summary: In this study, a modified F-N equation and a simplified one-dimensional unfolded slicing model were developed for simulating high-power Innoslab picosecond amplifiers. Several factors were considered, and the designed amplifiers showed good agreement between experimental and numerical results. These findings demonstrate the reliability and effectiveness of the developed model in designing and optimizing high-power Innoslab picosecond laser amplifiers.
Article
Optics
Dmitry Shestakov, Evgeniia Khairullina, Andrey Shishov, Soslan Khubezhov, Sergey Makarov, Ilya Tumkin, Lev Logunov
Summary: In this study, a novel method using picosecond laser pulses and deep eutectic solvents (DES) was proposed to increase the speed and quality of laser-induced chemical liquid deposition (LCLD) for local contact fabrication. The developed technique improved the fabrication speed of conductive copper structures and achieved a lower electrical resistivity compared to previous LCLD methods. The modified LCLD method simplified the DES preparation and deposition process, eliminating the need for a vacuum chamber or photomask. Stable and reproducible operation of commercial light-emitting diodes connected by the contacts made with the proposed technique was demonstrated.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Zhaoli Li, Yanlei Zuo, Xiaoming Zeng, Zhaohui Wu, Xiaodong Wang, Xiao Wang, Jie Mu, Bilong Hu
Summary: This paper introduces a scheme for generating ultraintense few-cycle infrared pulses by directly compressing a long infrared pulse. The method uses a rapidly extending plasma grating to reflect and compress the infrared laser pulse. Simulations demonstrate that this method can compress a pulse in the mid- to far-infrared range with a duration of tens of picoseconds to a few cycles with an efficiency exceeding 60%.
MATTER AND RADIATION AT EXTREMES
(2023)
Article
Physics, Multidisciplinary
Zhaohui Wu, Yanlei Zuo, Xiaoming Zeng, Zhaoli Li, Zhimeng Zhang, Xiaodong Wang, Bilong Hu, Xiao Wang, Jie Mu, Jingqin Su, Qihua Zhu, Yaping Dai
Summary: A method for compressing laser pulses using fast-extending plasma gratings is proposed, which can achieve temporal overlap and compression of pulses by utilizing ionized light-speed gratings. This method shows promise for generating critical laser powers.
MATTER AND RADIATION AT EXTREMES
(2022)
Article
Optics
Jia Du, Zhangjian Mu, Lan Li, Junying Li
Summary: Ge2Sb2Te5 (GST) is a successful nonvolatile phase change material that can be reversibly switched between amorphous and crystalline phases by nanosecond laser pulses. High-energy laser irradiation can modify molecular bonds in the GST thin film, forming different local structures. The GeTe4-nGen subsystem plays a decisive role in laser-induced crystallization of GST.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Alexey Kiselev, Vitaly V. Ionin, Anton A. Burtsev, Nikolai N. Eliseev, Vladimir A. Mikhalevsky, Natalya A. Arkharova, Dmitry N. Khmelenin, Andrey A. Lotin
Summary: The paper presents a study on the dynamics of phase transitions in GST thin films determined by the rate of change in their optical coefficients. It was found that the time for reflectivity change was shorter than that of transmissivity, with the estimated crystallization rate being higher than the reamorphization rate.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Wael Karim, Agnes Petit, Herve Rabat, Malek Tabbal, Anne-Lise Thomann, Nadjib Semmar
Summary: This study improves the performance of ceramic electrochemical cells by increasing the surface area through the formation of laser induced periodic surface structures (LIPSS).
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
