Results 131 to 140 of about 81,112 (307)

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source

Spectral line-by-line pulse shaping of on-chip microresonator frequency combs

, 2011
Recently, on-chip comb generation methods based on nonlinear optical modulation in ultrahigh-quality-factor monolithic microresonators have been demonstrated, where two pump photons are transformed into sideband photons in a four-wave-mixing process ...
Lei Chen, Wang, Jian, Daniel E. Leaird, Andrew M. Weiner, Miao, Houxun, Chen, Lei, Ferdous, Fahmida, Leaird, Daniel E., Srinivasan, Kartik, Kartik Srinivasan, Varghese, Leo Tom, Leo Tom Varghese, Houxun Miao, Jian Wang, Fahmida Ferdous, Weiner, Andrew M.   +15 more
core   +2 more sources

Beyond Presumptions: Toward Mechanistic Clarity in Metal‐Free Carbon Catalysts for Electrochemical H2O2 Production via Data Science

Advanced Materials, EarlyView.
Metal‐free carbon catalysts enable the sustainable synthesis of hydrogen peroxide via two‐electron oxygen reduction; however, active site complexity continues to hinder reliable interpretation. This review critiques correlation‐based approaches and highlights the importance of orthogonal experimental designs, standardized catalyst passports ...
Dayu Zhu, Hsi‐wen Wu, Xiao Wang, Jie Zhang   +3 more
wiley   +1 more source

Spectral diffusion in a three-state quantum system: studies of nonlinear optical susceptibilities

Results in Physics
We have incorporated spectral diffusion in a system of three quantum states immersed in a thermal bath for the study of optical responses in four-wave mixing spectroscopy, using the density matrix formalism and the development of quantum relaxation ...
José L. Paz, Edgar Márquez, Cristhian Dávila, Marcos A. Loroño, Lenin González-Paz, José R. Mora, Ysaias J. Alvarado   +6 more
doaj   +1 more source

CW Four-Wave Mixing in Synthetic Diamond

, 1989
We report efficient CW optical phase conjugation and resonantly enhanced four-wave mixing spectroscopy of the N-V color center in synthetic diamond. An ultra-narrow resonance is observed in the room temperature nearly degenerate four-wave mixing spectrum
D. A. Redman, S. C. Rand
core   +1 more source

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

Advanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano, Fabián Calleja, Ji Dai, Massimo Tallarida, Vera Marinova, Alessandro Barla, Marc G. Cuxart, Pierluigi Gargiani, Gonzalo N. Molina, José Angel Silva‐Guillén, Adriana I. Figueroa, Kevin García‐Díez, Sergio O. Valenzuela, Aitor Mugarza, Amadeo L. Vázquez de Parga, Rodolfo Miranda, Francisco Guinea, Manuela Garnica, Miguel A. Valbuena   +18 more
wiley   +1 more source

An Efficient Method for the Intermodal Four-Wave Mixing Process. [PDF]

Materials (Basel), 2022
Kwaśny M, Mergo P, Napierała M, Markiewicz K, Laudyn UA.   +4 more
europepmc   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Temporal characterization of ultrashort pulses via reflected four-wave mixing with perturbation on a solid surface

High Power Laser Science and Engineering
Time-domain characterization of ultrashort pulses is essential for studying interactions between light and matter. Here, we propose and demonstrate an all-optical pulse sampling technique based on reflected four-wave mixing with perturbation on a solid ...
Jinhui Li, Keyang Liu, Hao Yuan, Xingguo Wang, Qiwen Zhen, Xianglin Wang, Yishan Wang, Wei Zhao, Huabao Cao, Yuxi Fu   +9 more
doaj   +1 more source

Controlled Coherent Coupling in a Quantum Dot Molecule Revealed by Ultrafast Four-Wave Mixing Spectroscopy. [PDF]

ACS Photonics, 2023
Wigger D, Schall J, Deconinck M, Bart N, Mrowiński P, Krzykowski M, Gawarecki K, von Helversen M, Schmidt R, Bremer L, Bopp F, Reuter D, Wieck AD, Rodt S, Renard J, Nogues G, Ludwig A, Machnikowski P, Finley JJ, Reitzenstein S, Kasprzak J.   +20 more
europepmc   +1 more source