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| 2. |
- Vismarra, F., et al.
(författare)
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Isolated Attosecond Pulse Generation Driven by Spatio-Temporal Pulse Reshaping in a Semi-infinite Gas Cell
- 2023
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Ingår i: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023. - 9798350345995
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Konferensbidrag (refereegranskat)abstract
- High-order harmonic generation (HHG) is an ubiquitous tool of great interest in many fields of research from imaging to ultrafast spectroscopy [1]. In its most common implementation, an intense (≈ 1014 W/cm2) infrared (IR) pulse is focused on a noble gas target yielding a train of attosecond pulses in the extreme ultraviolet (XUV) spectral region. By adopting proper strategies and target geometries, it is possible to isolate an attosecond pulse out of the train. In this work, we demonstrate the generation of isolated attosecond pulses by spatio-temporal reshaping of few-cycle IR driving pulses in a semi-infinite gas cell. We combine numerical simulations and experiments to investigate the interplay between the spatio-temporal reshaping of the driving field, the generation of harmonics and the isolation of an attosecond pulse.
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| 3. |
- Gil-López, Águeda, et al.
(författare)
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Building an Enterprise for the Future Through Network Bricolage and Memories of the Past
- 2023
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Ingår i: Collective Entrepreneurship in the Contemporary European Services Industries: A Long Term Approach. - : Emerald Publishing Limited. - 9781801179508 - 1801179506 - 9781801179515 - 1801179514 ; , s. 95-116
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- This chapter explores how network bricolage, as a form of collective entrepreneurship, develops over time and influences the shape and form of an organization. Using a historical organization study of SEUR, a Spanish courier company founded in 1942, the authors show how network bricolage is implemented as a dynamic process of collaborative efforts between bricoleurs who draw on their historical experience to build and develop an organization. Our study offers two main contributions. In combining network bricolage with ideas of collective entrepreneurship, the authors first extend knowledge about the practice of bricolage and the role of the bricoleur in the entrepreneurial context beyond start-up. Second, the authors show that, while entrepreneurs’ decisions are historically contingent, it is how entrepreneurs wed past experience with current context which informs their actions in the present, shaping the enterprise for the future.
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- Palacin, M. R., et al.
(författare)
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Roadmap on multivalent batteries
- 2024
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Ingår i: JPhys Energy. - 2515-7655. ; 6:3
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Forskningsöversikt (refereegranskat)abstract
- Battery technologies based in multivalent charge carriers with ideally two or three electrons transferred per ion exchanged between the electrodes have large promises in raw performance numbers, most often expressed as high energy density, and are also ideally based on raw materials that are widely abundant and less expensive. Yet, these are still globally in their infancy, with some concepts (e.g. Mg metal) being more technologically mature. The challenges to address are derived on one side from the highly polarizing nature of multivalent ions when compared to single valent concepts such as Li+ or Na+ present in Li-ion or Na-ion batteries, and on the other, from the difficulties in achieving efficient metal plating/stripping (which remains the holy grail for lithium). Nonetheless, research performed to date has given some fruits and a clearer view of the challenges ahead. These include technological topics (production of thin and ductile metal foil anodes) but also chemical aspects (electrolytes with high conductivity enabling efficient plating/stripping) or high-capacity cathodes with suitable kinetics (better inorganic hosts for intercalation of such highly polarizable multivalent ions). This roadmap provides an extensive review by experts in the different technologies, which exhibit similarities but also striking differences, of the current state of the art in 2023 and the research directions and strategies currently underway to develop multivalent batteries. The aim is to provide an opinion with respect to the current challenges, potential bottlenecks, and also emerging opportunities for their practical deployment.
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