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Advances in ultrafast plasmonics
GPL Photonics Laboratory, State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China; Department of Physics, College of Natural and Computational Sciences, Wolaita Sodo University, Wolaita Sodo, Ethiopia.
Department of Chemical Sciences, University of Padova, Padova, Italy.
Department of Physics, University of Konstanz, Konstanz, Germany.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
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2023 (Engelska)Ingår i: Applied Physics Reviews, E-ISSN 1931-9401, Vol. 10, nr 2, artikel-id 021318Artikel, forskningsöversikt (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
American Institute of Physics (AIP), 2023. Vol. 10, nr 2, artikel-id 021318
Nationell ämneskategori
Atom- och molekylfysik och optik
Identifikatorer
URN: urn:nbn:se:umu:diva-208170DOI: 10.1063/5.0134993ISI: 001011167700001Scopus ID: 2-s2.0-85163206247OAI: oai:DiVA.org:umu-208170DiVA, id: diva2:1756179
Forskningsfinansiär
EU, Horisont Europa, 101046920Europeiska kommissionen, 964363EU, Europeiska forskningsrådet, 819871Deutsche Forschungsgemeinschaft (DFG), EXC 2089/1‐390776260Knut och Alice Wallenbergs Stiftelse, 2019.0140Kempestiftelserna, SMK21-0017Kempestiftelserna, JCK-3122Vetenskapsrådet, 2021-05784
Anmärkning

Originally included in thesis in manuscript form. 

Tillgänglig från: 2023-05-10 Skapad: 2023-05-10 Senast uppdaterad: 2024-04-11Bibliografiskt granskad
Ingår i avhandling
1. Enhancement of few-cycle light fields for relativistic nanophotonics
Öppna denna publikation i ny flik eller fönster >>Enhancement of few-cycle light fields for relativistic nanophotonics
2023 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Alternativ titel[sv]
Förbättring av få-cykliska ljusfält för relativistisk nanofotonik
Abstract [en]

Pulses of light that are both ultrashort and ultraintense are often generated using optical parametric amplifiers (OPA). These are capable of driving highly non-linear interactions with matter, which are interesting when studying the fundamental laws of our universe. Furthermore, they are also used in many scientific and industrial applications, such as particle accelerators, inertial-confinement nuclear fusion, and medical diagnostics and treatment. This thesis explores the diagnostic and optimization of pulses of light with extreme properties and utilizes them to drive electron acceleration.

The applied light pulses with very short duration (<5 fs) and high peak power (>10 TW) are sensitive to develop spatio-temporal aberrations. These are color-dependent distortions that can significantly degrade the pulse properties, like peak-intensity, and affect their applicability. Furthermore, in most cases they are not easy to correctly diagnose, with current tools failing to provide widely applicable solutions. In this thesis, we describe a new type of spatio-temporal coupling that is especially relevant for optical parametric synthesizers (OPS), systems that coherently combine multiple OPA stages. To do this, we have contributed to the development of two methods for the characterization of such aberrations, the so-called simplified-INSIGHT and HASO multispectral. These enabled us to further improve the structure of our OPS and laser systems.

We also explored the applicability of light pulses to drive relativistic electron acceleration in vacuum. To this end, an injection system using nanotips is presented, capable of inserting electrons spatially in the focus and temporally in the most intense light-cycle. This way, vacuum laser accelerated electrons of up to 14 MeV were detected using a tight focusing configuration (f#1) and their properties characterized. Furthermore, we investigated the dependence of the acceleration process when the focusing geometry is relaxed (f#3). This resulted in the unexpected outcome of similar electron energies in both cases, although the intensity was ten times reduced. This indicates that the decrease in accelerating field strength is compensated by longer acceleration lengths, which is not predicted by currently existing analytical models. 

Ort, förlag, år, upplaga, sidor
Umeå: Umeå University, 2023. s. 125
Nyckelord
Vacuum laser acceleration, spatio-spectral characterization, relativistic nanophotonics, optical parametric synthesis
Nationell ämneskategori
Atom- och molekylfysik och optik
Forskningsämne
fysik
Identifikatorer
urn:nbn:se:umu:diva-208146 (URN)978-91-8070-094-8 (ISBN)978-91-8070-093-1 (ISBN)
Disputation
2023-06-08, Lilla hörsalen - KBE301, KBC building, Umeå, 13:00 (Engelska)
Opponent
Handledare
Forskningsfinansiär
Vetenskapsrådet, 2019-02376Knut och Alice Wallenbergs Stiftelse, 2019.0140Kempestiftelserna, SMK21-0017Vetenskapsrådet, 2020-05111
Tillgänglig från: 2023-05-17 Skapad: 2023-05-10 Senast uppdaterad: 2024-05-10Bibliografiskt granskad

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Henriksson, Nilsde Andres, AitorSchnur, FritzTapani, TilaikeLin, HaifengVeisz, LászlóMaccaferri, Nicolò

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