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Publications (4 of 4) Show all publications
Caligiuri, V., Kwon, H., Griesi, A., Ivanov, Y. P., Schirato, A., Alabastri, A., . . . Garoli, D. (2024). Dry synthesis of bi-layer nanoporous metal films as plasmonic metamaterial. Nanophotonics, 13(7), 1159-1167
Open this publication in new window or tab >>Dry synthesis of bi-layer nanoporous metal films as plasmonic metamaterial
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2024 (English)In: Nanophotonics, ISSN 2192-8606, Vol. 13, no 7, p. 1159-1167Article in journal (Refereed) Published
Abstract [en]

Nanoporous metals are a class of nanostructured materials finding extensive applications in multiple fields thanks to their unique properties attributed to their high surface area and interconnected nanoscale ligaments. They can be prepared following different strategies, but the deposition of an arbitrary pure porous metal is still challenging. Recently, a dry synthesis of nanoporous films based on the plasma treatment of metal thin layers deposited by physical vapour deposition has been demonstrated, as a general route to form pure nanoporous films from a large set of metals. An interesting aspect related to this approach is the possibility to apply the same methodology to deposit the porous films as a multilayer. In this way, it is possible to explore the properties of different porous metals in close contact. As demonstrated in this paper, interesting plasmonic properties emerge in a nanoporous Au–Ag bi-layer. The versatility of the method coupled with the possibility to include many different metals, provides an opportunity to tailor their optical resonances and to exploit the chemical and mechanical properties of components, which is of great interest to applications ranging from sensing, to photochemistry and photocatalysis.

Place, publisher, year, edition, pages
Walter de Gruyter, 2024
Keywords
catholuminescence, EELS, multilayer, nanoporous metal, plasmonics
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:umu:diva-222964 (URN)10.1515/nanoph-2023-0942 (DOI)001182345800001 ()2-s2.0-85187950164 (Scopus ID)
Funder
EU, Horizon 2020, 964995Swedish Research Council, 2021-05784The Kempe Foundations, JCK-3122
Available from: 2024-04-11 Created: 2024-04-11 Last updated: 2024-04-11Bibliographically approved
Tapani, T., Lin, H., de Andres, A., Jolly, S. W., Bhuvanendran, H. & Maccaferri, N. (2024). Vortex plate retarder-based approach for the generation of sub-20 fs light pulses carrying orbital angular momentum. Journal of Optics, 26(4), Article ID 045502.
Open this publication in new window or tab >>Vortex plate retarder-based approach for the generation of sub-20 fs light pulses carrying orbital angular momentum
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2024 (English)In: Journal of Optics, ISSN 2040-8978, E-ISSN 2040-8986, Vol. 26, no 4, article id 045502Article in journal (Refereed) Published
Abstract [en]

We use a vortex retarder-based approach to generate few optical cycles light pulses carrying orbital angular momentum (OAM) (known also as twisted light or optical vortex) from a Yb:KGW oscillator pumping a noncollinear optical parametric amplifier generating sub-10 fs linearly polarized light pulses in the near infrared spectral range (central wavelength 850 nm). We characterize such vortices both spatially and temporally by using astigmatic imaging technique and second harmonic generation-based frequency resolved optical gating, respectively. The generation of optical vortices is analyzed, and its structure reconstructed by estimating the spatio-spectral field and Fourier transforming it into the temporal domain. As a proof of concept, we show that we can also generate sub-20 fs light pulses carrying OAM and with arbitrary polarization on the first-order Poincaré sphere.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2024
Keywords
optical vortex, orbital angular momentum, twisted light, ultrashort light pulses, vortex plate retarder
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:umu:diva-222577 (URN)10.1088/2040-8986/ad2e1f (DOI)001183679100001 ()2-s2.0-85187554162 (Scopus ID)
Funder
Swedish Research Council, 2021-05784The Kempe Foundations, JCK-3122EU, Horizon 2020, 801505
Available from: 2024-04-08 Created: 2024-04-08 Last updated: 2024-04-11Bibliographically approved
Nana Koya, A., Romanelli, M., Kuttruff, J., Henriksson, N., Stefancu, A., Grinblat, G., . . . Maccaferri, N. (2023). Advances in ultrafast plasmonics. Applied Physics Reviews, 10(2), Article ID 021318.
Open this publication in new window or tab >>Advances in ultrafast plasmonics
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2023 (English)In: Applied Physics Reviews, E-ISSN 1931-9401, Vol. 10, no 2, article id 021318Article, review/survey (Refereed) Published
Abstract [en]

In the past 20 years, we have reached a broad understanding of many light-driven phenomena in nanoscale systems. The temporal dynamics of the excited states are instead quite challenging to explore, and, at the same time, crucial to study for understanding the origin of fundamental physical and chemical processes. In this review, we examine the current state and prospects of ultrafast phenomena driven by plasmons both from a fundamental and applied point of view. This research area is referred to as ultrafast plasmonics and represents an outstanding playground to tailor and control fast optical and electronic processes at the nanoscale, such as ultrafast optical switching, single photon emission, and strong coupling interactions to tailor photochemical reactions. Here, we provide an overview of the field and describe the methodologies to monitor and control nanoscale phenomena with plasmons at ultrafast timescales in terms of both modeling and experimental characterization. Various directions are showcased, among others recent advances in ultrafast plasmon-driven chemistry and multi-functional plasmonics, in which charge, spin, and lattice degrees of freedom are exploited to provide active control of the optical and electronic properties of nanoscale materials. As the focus shifts to the development of practical devices, such as all-optical transistors, we also emphasize new materials and applications in ultrafast plasmonics and highlight recent development in the relativistic realm. The latter is a promising research field with potential applications in fusion research or particle and light sources providing properties such as attosecond duration.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2023
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:umu:diva-208170 (URN)10.1063/5.0134993 (DOI)001011167700001 ()2-s2.0-85163206247 (Scopus ID)
Funder
EU, Horizon Europe, 101046920European Commission, 964363EU, European Research Council, 819871German Research Foundation (DFG), EXC 2089/1‐390776260Knut and Alice Wallenberg Foundation, 2019.0140The Kempe Foundations, SMK21-0017The Kempe Foundations, JCK-3122Swedish Research Council, 2021-05784
Note

Originally included in thesis in manuscript form. 

Available from: 2023-05-10 Created: 2023-05-10 Last updated: 2024-04-11Bibliographically approved
Tapani, T., Lin, H., Henriksson, N. & Maccaferri, N. (2023). Non-degenerate magneto-optical pump-probe spectroscopy of thermal and nonthermal spin dynamics in magnetic and magnetoplasmonic materials with sub-15 fs time resolution. In: Mario Bertolotti; Anatoly V. Zayats; Alexei M. Zheltikov (Ed.), Proceedings of SPIE - The International Society for Optical Engineering: . Paper presented at Nonlinear Optics and Applications XIII 2023, Prague, 24-25 april, 2023.. SPIE - International Society for Optical Engineering, Article ID 1256905.
Open this publication in new window or tab >>Non-degenerate magneto-optical pump-probe spectroscopy of thermal and nonthermal spin dynamics in magnetic and magnetoplasmonic materials with sub-15 fs time resolution
2023 (English)In: Proceedings of SPIE - The International Society for Optical Engineering / [ed] Mario Bertolotti; Anatoly V. Zayats; Alexei M. Zheltikov, SPIE - International Society for Optical Engineering, 2023, article id 1256905Conference paper, Published paper (Refereed)
Abstract [en]

Photonics and spintronics represent a great promise to overcome the fundamental limits of electronics since light and spins are simultaneously much faster and less dissipative of electrons. In this framework, the quest for energy-efficient data processing and storage functionalities led great attention to the field of femtomagnetism, the study and control of magnetism using ultrashort light pulses. However, our knowledge of magnetic phenomena and ultrafast light-matter interactions in nanoscale magnetic materials is extremely limited. In this work, we introduce a time-resolved magneto-optical pump-probe spectroscopy scheme enabling to access both the thermal and nonthermal spin (and charge) dynamics with sub-15 fs temporal resolution. We test the capabilities of our system on archetypical magnetic and magnetoplasmonic materials, such as Ni thin films and Ni nanodisks.

Place, publisher, year, edition, pages
SPIE - International Society for Optical Engineering, 2023
Series
Proceedings of SPIE, ISSN 0277786X, E-ISSN 1996756X ; 12569
Keywords
Magnetoplasmonics, Nanostructures, Nickel, Nonthermalized electrons, Plasmonics, Pump-probe, Ultrafast magnetism, Ultrafast spin dynamics
National Category
Condensed Matter Physics Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:umu:diva-214602 (URN)10.1117/12.2665673 (DOI)2-s2.0-85171200917 (Scopus ID)9781510662582 (ISBN)9781510662599 (ISBN)
Conference
Nonlinear Optics and Applications XIII 2023, Prague, 24-25 april, 2023.
Note

Volume 12569: Nonlinear Optics and Applications

Available from: 2023-09-28 Created: 2023-09-28 Last updated: 2024-04-11Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-5256-3292

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