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- Pancaldi, Matteo (author)
Terahertz metamaterials for light-driven magnetism
- Article/chapterEnglish2024
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- 2024
- 2024
- printrdacarrier
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- LIBRIS-ID:oai:DiVA.org:su-226933
- https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-226933URI
- https://doi.org/10.1515/nanoph-2023-0801DOI
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- Language:English
- Summary in:English
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- We describe the design of two types of metamaterials aimed at enhancing terahertz field pulses that can be used to control the magnetic state in condensed matter systems. The first structure is a so-called “dragonfly” antenna, able to realize a five-fold enhancement of the impinging terahertz magnetic field, while preserving its broadband features. For currently available state-of-the-art table top sources, this leads to peak magnetic fields exceeding 1 T. The second structure is an octopole antenna aimed at enhancing a circularly-polarized terahertz electric field, while preserving its polarization state. We obtain a five-fold enhancement of the electric field, hence expected to exceed the 1 MV/cm peak amplitude. Both our structures can be readily fabricated on top of virtually any material.
Subject headings and genre
- NATURVETENSKAP Fysik Den kondenserade materiens fysik hsv//swe
- NATURAL SCIENCES Physical Sciences Condensed Matter Physics hsv//eng
- terahertz fields
- terahertz metamaterials
- ultrafast magnetism
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- Vavassori, Paolo (author)
- Bonetti, Stefano,1982-Stockholms universitet,Fysikum,Ca’ Foscari University of Venice, Italy(Swepub:su)sbone (author)
- Stockholms universitetFysikum (creator_code:org_t)
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- In:Nanophotonics2192-8614
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