Results 121 to 130 of about 5,194,279 (273)

Resonant Domain Wall Dynamics in a Three‐Dimensional Magnetic Nano Double Helix

Advanced Materials, EarlyView.
3D magnetic nanostructures promise exciting possibilities for magnetization dynamics. However, experimental realizations remain scarce. In nanoprinted cobalt double helices, time‐resolved X‐ray microscopy reveals harmonic domain wall dynamics. Simulations identify the mode and additional higher‐frequency resonances, revealing a rich dynamic landscape ...
Pamela Morales‐Fernández, Iason Konstantinos‐Douveas, Claas Abert, Elina Zhakina, Sandra Ruiz‐Gómez, Claudia Fernández‐González, Luke Alexander Turnbull, Sebastian Wintz, Markus König, Simone Finizio, Markus Weigand, Naëmi Leo, Dieter Suess, Aurelio Hierro‐Rodríguez, Amalio Fernández‐Pacheco, Claire Donnelly   +15 more
wiley   +1 more source

Angular Quasi-Phase-Matching in a Sphere of PPRKTP

, 2018
we report the first measurements of angular quasi-phase-matching directions of secondharmonic generation performed in the periodically-poled Rb-doped KTiOPO4 biaxial crystal cut as a sphere.
Canalias, Carlota,, Alexandra Pena, Fredrik Laurell, Dazhi Lu, valdas Pasiskevicius, Carlota canalias, Segonds, P., Pasiskevicius, Valdas,, Lu, D., Patricia Segonds, Zukauskas, Andrius,, Boulanger, B., Jerome Debray, Benoit Boulanger, Peña, A., Laurell, Fredrik,, Andrius Zukauskas, Debray, J.   +17 more
core   +1 more source

Recent Progress in the Phase‐Controlled Synthesis of Ruthenium Nanocrystals for Catalytic Applications

Advanced Materials, EarlyView.
Template effect and kinetic control enable crystal‐phase engineering of Ru nanocrystals, granting access to either metastable fcc‐Ru or stable hcp‐Ru with distinct surface structures, thermal stabilities, and catalytic behaviors. Moreover, the hcp‐Ru can further serve as an epitaxial template to direct Pd and Rh nanocrystals into the metastable hcp ...
Jianlong He, Zhiqi Wang, Jiaqi Guan, Younan Xia   +3 more
wiley   +1 more source

Random Quasi-Phase-Matching On A Nanophotonic Heterogeneous Silicon Chip

, 2018
We demonstrate grating-assisted random quasi-phase-matching in unpoled thin-film lithium niobate waveguides on a silicon substrate via second-harmonic generation from near-infrared to visible ...
Sjaardema, Tracy, Camacho-Gonzalez, Guillermo F., Honardoost, Amirmahdi, Rao, Ashutosh, Malinowski, Marcin   +4 more
core   +1 more source

Beyond standard DFT: Accurate electronic and NLO characterization of ZnSe and GaN for QPM device design using HSE06 hybrid functional

Physics Open
Designing efficient optoelectronic devices requires a precise understanding of the bandgap, a parameter often poorly predicted by standard DFT. In this study, we tackle this “bandgap problem” for cubic GaN and ZnSe (space group F4‾3m) by employing the ...
Dahame Tahar, Yousfi Aissa, El Hamra Fatima, Fadla Mohamed Abdelilah, Djeradi Sabrina, Bendelala Fathi, Sarhani Mohammed Elsaid   +6 more
doaj   +1 more source

Phase Engineering of Nanomaterials (PEN): Evolution, Current Challenges, and Future Opportunities

Advanced Materials, EarlyView.
This review summarizes the synthesis, phase transition, advanced characterization spanning ex situ to in situ and operando techniques, and diverse applications of phase engineering of nanomaterials (PEN). It further outlines key challenges and future opportunities, such as phase stability, architecture control, and artificial intelligence (AI)‐driven ...
Ye Chen, Zhanxi Fan, Jingjie Ge, Qiyuan He, Zhuangchai Lai, Jiawei Liu, Chaoliang Tan, Hua Zhang   +7 more
wiley   +1 more source

Type-II quasi phase matching in periodically intermixed semiconductor superlattice waveguides

, 2010
Second-harmonic generation using the type-II polarization configuration is demonstrated in quasi-phase-matched GaAs/AlGaAs superlattice waveguides. Phase-matching wavelengths and conversion efficiencies were determined for several quasi-phase-matching ...
Aitchison, J.S., Hutchings, D.C., Helmy, A.S., Wagner, S.J., Younis, U., Holmes, B.M.   +5 more
core   +1 more source

The temperature-dependent in noncollinear SPDC for generating biphotons with single cycles

Journal of the European Optical Society-Rapid Publications
The influence of temperature on generating single cycle biphotons by noncollinear spontaneous parametric down-conversion (SPDC) in chirped quasi-phase-matching (QPM) periodically poled lithium niobate (PPLN) crystal have been studied in this paper ...
Lin Haibo, Wang Jinbao
doaj   +1 more source

Confinement‐Induced Donnan Potential Enables Sealed Hydrovoltaic Power From Microliter Water

Advanced Materials, EarlyView.
An ultrathin MXene/cellulose nanofiber (CNF) nanochannel‐based hydrovoltaic generator produces sustained direct current (DC) from a single microliter droplet under sealed operation. Asymmetric nanochannel confinement establishes a persistent ion gradient and a confinement‐induced Donnan potential, harvesting the interfacial free energy released upon ...
Sangyun Na, Geonyoung Jung, Yoojin Chang, Yun Goo Ro, Cheolhong Park, Jeonghee Yeom, Jinyoung Kim, Jeeyoon Kim, Hyejin Lee, Hyeji Oh, Hyunhyub Ko   +10 more
wiley   +1 more source

Antiphase domain tailoring for combination of modal and 4¯ -quasi-phase matching in gallium phosphide microdisks

, 2016
International audienceWe propose a novel phase-matching scheme in GaP whispering-gallery-mode microdisks grown on Si substrate combining modal and 4¯ -quasi-phase-matching for second-harmonic-generation.
Durand, Olivier, Letoublon, Antoine, Vallet, Maxime, Guillemé, Pierre, Stodolna, Julien, Ponchet, Anne, Féron, Patrice, Léger, Yoan, Dumeige, Yannick, Cornet, Charles   +9 more
core   +1 more source