Results 21 to 30 of about 697,288 (293)

Linewidth reduction and frequency stabilization of a semiconductor laser with a combination of FM sideband locking and optical feedback [PDF]

, 1993
We describe a novel method for semiconductor laser noise reduction that uses a combination of optical and electronic feedback. A Doppler-free Faraday resonance in Cs vapor provided both optical feedback and discrimination for an electronic feedback ...
Kitching, J., Shevy, Y., Yariv, A.
core   +1 more source

Synthesis, Structure and Photochemistry of Dibenzylidenecyclobutanones

Molecules, 2022
A series of symmetrical dibenzylidene derivatives of cyclobutanone were synthesized with the goal of studying the physicochemical properties of cross-conjugated dienones (ketocyanine dyes). The structures of the products were established and studied by X-
Marina V. Fomina, Alexandra Y. Freidzon, Lyudmila G. Kuz’mina, Anna A. Moiseeva, Roman O. Starostin, Nikolai A. Kurchavov, Vyacheslav N. Nuriev, Sergey P. Gromov   +7 more
doaj   +1 more source

Relativistic stability of positronium atoms in a linearly polarized high frequency super-intense laser field

Results in Physics, 2021
Utilizing the relativistically corrected Krammers-Henneberger (KH) potential in the high frequency Floquet theory (HFFT), the ground state of the positronium (Ps) atom in a linearly polarized high frequency super-intense laser field is investigated ...
Yifan Xing, Yuanling Huang, Fengyi Yuan, Xinye Xu, Jiaxiang Wang   +4 more
doaj   +1 more source

Electron Energy-Loss Spectroscopy [PDF]

Microscopy and Microanalysis, 1997
Solid-state scientists have many analytical techniques to choose from. But electron energy-loss spectroscopy does some things that no other technique can quite match. Electron energy-loss spectroscopy can, for example, form chemical maps of nanometre-sized regions in solid samples. It can be used to characterize interfaces buried deep in samples and to
openaire   +1 more source

Efficient Optical Modulation of Exciton State Population in Monolayer MoS₂ at Room Temperature

Nanomaterials, 2022
The modulation of exciton energy and state density of layer-structured transition metal dichalcogenides (TMDs) is required for diverse optoelectronic device applications.
Zeqian Ren, Qiwei Zhang, Xiu Li, Lixia Guo, Jizhou Wu, Yuqing Li, Wenliang Liu, Peng Li, Yongming Fu, Jie Ma   +9 more
doaj   +1 more source

Distinctive character of electronic and vibrational coherences in disordered molecular aggregates

, 2013
Coherent dynamics of coupled molecules are effectively characterized by the two-dimensional (2D) electronic coherent spectroscopy. Depending on the coupling between electronic and vibrational states, oscillating signals of purely electronic, purely ...
Abramavicius, Darius, Butkus, Vytautas, Valkunas, Leonas, Zigmantas, Donatas   +3 more
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Atomic-scale characterization of nitrogen-doped graphite: Effects of dopant nitrogen on the local electronic structure of the surrounding carbon atoms [PDF]

, 2012
We report the local atomic and electronic structure of a nitrogen-doped graphite surface by scanning tunnelling microscopy, scanning tunnelling spectroscopy, X-ray photoelectron spectroscopy, and first-principles calculations. The nitrogen-doped graphite
Casolo Simone, Harada Yoshihisa, Kondo Takahiro, Nakamura Junji, Oshima Masaharu, Saito Makoto, Sakurai Masataka, Shikano Taishi, Suzuki Tetsuya, Tantardini Gian Franco, Trioni Mario Italo, 中村 潤児, 近藤 剛弘   +12 more
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Theory of Electron Spectroscopies [PDF]

, 2001
The basic theory of photoemission, inverse photoemission, Auger-electron and appearance-potential spectroscopy is developed within a unified framework starting from Fermi's golden rule. The spin-resolved and temperature-dependent appearance-potential spectroscopy of band-ferromagnetic transition metals is studied in detail.
openaire   +2 more sources

Subnanosecond Marx Generators for Picosecond Gain-Switched Laser Diodes

IEEE Photonics Journal
High precision time-of-flight based light detection and ranging (LiDAR) system needs compact ultrafast pulsed lasers, such as gain-switched semiconductor laser diodes, which have the advantages of low cost, small size, and mass-producible, for short ...
Fuyi Cao, Dongxin Jiang, Yuejun Liu, Yunpeng Tian, Xu Ran, Yisu Long, Takashi Ito, Xiaobo Hu, Guoen Weng, Hidefumi Akiyama, Shaoqiang Chen   +10 more
doaj   +1 more source

Synthesis and Spectroscopy of Buckminsterfullerene Cation ${\mathrm{C}}_{60}^{+}$ in a Cryogenic Ion Trapping Instrument

Crystals, 2021
The assignment of several diffuse interstellar bands in the near-infrared to C60+ ions present at high abundance in space has renewed interest in the astrochemical importance of fullerenes and analogues.
Ewen K. Campbell, Johanna Rademacher, Saida M. M. Bana   +2 more
doaj   +1 more source