Results 61 to 70 of about 155,967 (379)

Unveiling Phonon Contributions to Thermal Conductivity and the Applicability of the Wiedemann—Franz Law in Ruthenium and Tungsten Thin Films

Advanced Functional Materials, EarlyView.
Thermal transport in Ru and W thin films is studied using steady‐state thermoreflectance, ultrafast pump–probe spectroscopy, infrared‐visible spectroscopy, and computations. Significant Lorenz number deviations reveal strong phonon contributions, reaching 45% in Ru and 62% in W.
Md. Rafiqul Islam, Pravin Karna, Niraj Bhatt, Sandip Thakur, Helge Heinrich, Daniel M. Hirt, Saman Zare, Christopher Jezewski, Rinus T.P. Lee, Kandabara Tapily, John T. Gaskins, Colin D. Landon, Sean W. King, Ashutosh Giri, Patrick E. Hopkins   +14 more
wiley   +1 more source

Self-Guided Intense Laser Pulse Propagation in Air

Nonlinear Analysis, 2001
We report on observation of self-guiding of picosecond laser pulses in air that produces large-scale self-phase modulation. The converging picosecond laser beam produced a confined filament over 3 m of propagation with the whitelight spectrum.
R. Danielius, D. Mikalauskas, A. Dubietis, A. Piskarskas   +3 more
doaj   +1 more source

Developments of Space Debris Laser Ranging Technology Including the Applications of Picosecond Lasers

Applied Sciences, 2021
Debris laser ranging (DLR) is receiving considerable attention as an accurate and effective method of determining and predicting the orbits of space debris.
Haifeng Zhang, Mingliang Long, Huarong Deng, Shaoyu Cheng, Zhibo Wu, Zhongping Zhang, Ali Zhang, Jiantao Sun   +7 more
doaj   +1 more source

Ultrafast supercontinuum fiber-laser based pump-probe scanning MOKE microscope for the investigation of electron spin dynamics in semiconductors at cryogenic temperatures with picosecond time and micrometer spatial resolution

, 2013
We describe a two-color pump-probe scanning magneto-optical Kerr effect (MOKE) microscope which we have developed to investigate electron spin phenomena in semiconductors at cryogenic temperatures with picosecond time and micrometer spatial resolution ...
Biermann, K., Henn, T., Kiessling, T., Molenkamp, L. W., Ossau, W., Santos, P. V.   +5 more
core   +1 more source

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

Evaluation of the safety and efficacy of the dual wavelength picosecond laser for the treatment of benign pigmented lesions in Asians

Lasers in Surgery and Medicine, 2018
Cutaneous pigmentary disorders are both more common and more difficult to treat in patients with skin color given the higher melanin content in the epidermis.
K. Kung, S. Shek, C. Yeung, H. Chan
semanticscholar   +1 more source

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source

Intrapulse Correlated Dynamics of Self-Phase Modulation and Spontaneous Raman Scattering in Synthetic Diamond Excited and Probed by Positively Chirped Ultrashort Laser Pulses

Photonics, 2023
In synthetic diamond plates, the intrapulse-correlated dynamics of self-phase modulation and spontaneous nonresonant Raman scattering by center-zone optical phonons were for the first time directly investigated for tightly focused (focusing numerical ...
Sergey Kudryashov, Pavel Danilov, Jiajun Chen   +2 more
doaj   +1 more source

Coherent magnetization precession in ferromagnetic (Ga,Mn)As induced by picosecond acoustic pulses

, 2010
We show that the magnetization of a thin ferromagnetic (Ga,Mn)As layer can be modulated by picosecond acoustic pulses. In this approach a picosecond strain pulse injected into the structure induces a tilt of the magnetization vector M, followed by the ...
Akimov, A. V., Bayer, M., Bombeck, M., Brüggemann, C., Furdyna, J. K., Liu, X., Salasyuk, A. S., Sapega, V. F., Scherbakov, A. V., Yakovlev, D. R.   +9 more
core   +1 more source

Fluence dependent femtosecond quasi-particle and Eu^{2+} -spin relaxation dynamics in EuFe_{2}(As,P)_{2} [PDF]

, 2016
We investigated temperature and fluence dependent dynamics of the time resolved optical reflectivity in undoped spin-density-wave (SDW) and doped superconducting (SC) EuFe$_{2}$(As,P)$_{2}$ with emphasis on the ordered Eu$^{2+}$-spin temperature region ...
Cao, G., Mertelj, T., Mihailovic, D., Pogrebna, A., Xu, Z. A.   +4 more
core   +2 more sources