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您的检索式：作者名="Vincent Hartmann"
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| 1 | Contribution of eiliated microprotozoans and dinoflagellates to the diet of three copepod species in the Bay of Biscay显示文摘 | Vincent D Hartmann H J | 2001 | Hydrobiologia2001，443，： | 1 |
| 2 | Contribution of Ciliated Microprotozoans and Dinoflagellates to the diet of three Copepod species in the Bay of Biscay 显示文摘 | Vincent D Hartmann H J | 2001 | Hydrobiologia2001，443，： | 1 |
| 3 | GeSnOI mid-infrared laser technology显示文摘GeSn alloys are promising materials for CMOS-compatible mid-infrared lasers manufacturing.Indeed,Sn alloying and tensile strain can transform them into direct bandgap semiconductors.This growing laser technology however suffers from a number of limitations,such as poor optical confinement,lack of strain,thermal,and defects management,all of which are poorly discussed in the literature.Herein,a specific GeSn-on-insulator(GeSnOI)stack using stressor layers as dielectric optical claddings is demonstrated to be suitable for a monolithically integration of planar Group-IV semiconductor lasers on a versatile photonic platform for the near-and mid-infrared spectral range.Microdisk-shape resonators on mesa structures were fabricated from GeSnOI,after bonding a Ge_(0.9)Sn_(0.1) alloy layer grown on a Ge strain-relaxed-buffer,itself on a Si(001)substrate.The GeSnOI microdisk mesas exhibited significantly improved optical gain as compared to that of conventional suspended microdisk resonators formed from the as-grown layer.We further show enhanced vertical out-coupling of the disk whispering gallery mode in-plane radiation,with up to 30%vertical out-coupling efficiency.As a result,the GeSnOI approach can be a valuable asset in the development of silicon-based mid-infrared photonics that combine integrated sources in a photonic platform with complex lightwave engineering. | Binbin Wang Emilie Sakat Etienne Herth Maksym Gromovyi Andjelika Bjelajac Julien Chaste Gilles Patriarche Philippe Boucaud Frédéric Boeuf Nicolas Pauc Vincent Calvo Jérémie Chrétien Marvin Frauenrath Alexei Chelnokov Vincent Reboud Jean-Michel Hartmann Moustafa El Kurdi | 2021 | Light(Science & Applications)2021，10，12： | 0 |
| 4 | Binary fluids in mesoporous materials: Phase separation studied by NMR relaxation and diffusion显示文摘Relaxation and diffusion measurements were carried out on single and binary liquids filling the pore space of controlled porous glass Vycor with an average pore size of about 4 nm.The dispersion of the longitudinal relaxation time Tr is discussed as a means to identify liquid-surface interaction based on existing models developed for metal-free glass surfaces.In addition,the change of T1 and T2 with respect to their bulk values is discussed,in particular T2 serves as a probe for the strength of molecular interactions.As the native glass surface is polar and contains a large amount of hydroxyl groups,a pronounced interaction of polar and protic adsorbate liquids is expected;however,the T dispersion,and the corresponding reduction of T2,are also observed for non-polar liquids such as alkanes and cyclohexane.Deuterated liquids are employed for simplifying data analysis in binary systems,but also for separating the respective contributions of intra-and intermolecular interactions to the overall relaxation rate.Despite the lack of paramagnetic impurities in the glass material,H and 2H relaxation dispersions of equivalent molecules are frequently found to differ from each other,suggesting intermolecular relaxation mechanisms for the'H nuclei.The variation of the T dispersion when comparing single and binary systems gives clear evidence for the preferential adsorption of one of the two liquids,suggesting complete phase separation in several cases.Measurement of the apparent tortuosity by self-diffusion experiments supports the concept of a local variation of sample composition within the porespace. | Siegfried Stapf Niklas Siebert Timo Spalek Vincent Hartmann Bulat Gizatullin Carlos Mattea | 2023 | Magnetic Resonance Letters2023，3，2： | 0 |
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