Results 51 to 60 of about 1,168,263 (300)

Picosecond and sub-picosecond pulse generation in semiconductor lasers [PDF]

Journal de Physique III, 1992
Generation of short optical pulses in semiconductor lasers is of practical interest for an increasing number of applications. It is also of fundamental interest because of its tight relation with the field of semiconductor laser dynamics. After an introductory review, we compare the performances of gain-switching, Q-switching and mode-locking ...
Lourtioz, J.-M., Chusseau, Laurent, Stelmakh, N.   +2 more
openaire   +1 more source

Optimal Control Drives Ultrafast and Energy‐Efficient Magnetization Switching in Van der Waals Magnets

Advanced Materials, EarlyView.
ABSTRACT The accelerating expansion of data‐centric technologies is sharply increasing the energy burden of information storage, placing unprecedented pressure on the efficiency of magnetic switching. Conventional field‐driven reversal, once the foundation of magnetic memory, has become impractical in modern architectures due to its high energy cost ...
Mohammad H. Badarneh, PeiYu Cai, Elton J. G. Santos   +2 more
wiley   +1 more source

Research on fiber-solid hybrid picosecond laser technology based on serrated aperture beam shaping

Frontiers in Physics
The high beam fill factor of the flat-top laser can effectively increase the output power of the laser without damaging the components. A fiber-solid hybrid high-energy picosecond pulsed laser system was studied, which realized the gain bandwidth ...
Shun Li, Yang Yang, Haiqiang Wang, Yunchen Zhu, Meijiao Wang, Chao Ma, Xinmin Fan, Yang Zhao, Huizhe Jing, Daiping Liu   +9 more
doaj   +1 more source

Effect of surface plasmon on optical detection of picosecond ultrasonic pulses generated in aluminum nanofilms

Photoacoustics, 2023
Photoacoustic and thermoacoustic detection methods, including picosecond ultrasonic laser sonar based on metallic thin films, are widely used in industrial applications for their noninvasiveness.
Ting-Shan Lee, Chi-Kuang Sun
doaj   +1 more source

Picosecond Laser Ablation of Dentine in Endodontics

Lasers in Medical Science, 1999
. The interaction of picosecond laser radiation with human dental tissue was investigated in this study, in order to determine the ablation rates and the surface characteristics of the dentine by using scanning electron microscopy (SEM). Dentine ablation was performed by using tooth sections of different thicknesses (0.5–2.0 mm).
Serafetinides, AA, Khabbaz, MG, Makropoulou, MI, Kar, AK   +3 more
openaire   +2 more sources

Clustomesogen Showing Sub‐Zero Liquid Crystal Properties: Supramolecular Assembly Between Cs2[Mo6Ii8(OCOC2F5)6] and Hexaethylenoxide Containing Mesogenic Dimers

Advanced Materials, EarlyView.
Associating a red‐NIR phosphorescent octahedral hexanuclear molybdenum cluster compound with hexaethyleneoxide chains bearing mesogenic units on both ends leads to an emissive hybrid liquid crystal showing mesomorphism on a very unusual temperature range down to −25°C.
Killiann Heinz, Jeanne Rebours, Zoulikha Zerrouqi, Noée Dumait, Maria Amela‐Cortes, Nikolai Scheuring, Sara Simonovska, Sebastian Marino, Max Ebert, Stéphane Cordier, Sabine Laschat, Yann Molard   +11 more
wiley   +1 more source

A low jitter regenerative amplification picosecond pulse laser with the external trigger signal as local main wave for the SLR

Results in Optics
A distributed feedback picosecond (DFB) pulse laser has been designed with a single pulse energy of 5 pJ and a pulse width of 200 ps, resulting in a spectrum width of 0.12 nm.
Mingliang Long, Zhibo Wu, Ming Wen, Yan Liang, Haifeng Zhang, Hao Chang, Huarong Deng, Zhongping Zhang   +7 more
doaj   +1 more source

Green Picosecond Laser Machining of Thermoset and Thermoplastic Carbon Fiber Reinforced Polymers

Micromachines, 2021
There has been an increase in demand for the development of lightweight and high-strength materials for applications in the transportation industry. Carbon fiber reinforced polymer (CFRP) is known as one of the most promising materials owing to its high ...
Insung Choi, Su-Jin Lee, Dongsig Shin, Jeong Suh   +3 more
doaj   +1 more source

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

Advanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

Neural network analysis of quasistationary magnetic fields in microcoils driven by short laser pulses

Scientific Reports, 2022
Optical generation of kilo-tesla scale magnetic fields enables prospective technologies and fundamental studies with unprecedentedly high magnetic field energy density.
Iu. V. Kochetkov, N. D. Bukharskii, M. Ehret, Y. Abe, K. F. F. Law, V. Ospina-Bohorquez, J. J. Santos, S. Fujioka, G. Schaumann, B. Zielbauer, A. Kuznetsov, Ph. Korneev   +11 more
doaj   +1 more source