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This approach is also promising for all\u2010optical switching using low\u2010intensity optical beams. In this work, plasmonic circular dichroism is demonstrated using closely spaced gold nanoparticle dimers, exhibiting high near\u2010field contrast under left\u2010circularly polarized (LCP) and right\u2010circularly polarized (RCP) illumination. Using scanning near\u2010field optical microscopy (SNOM), the dichroic behavior of the dimers under LCP and RCP illumination is mapped, enabling hot spots to become cold spots with full optical control. More importantly, the eigenmode excitations and their contributions to the plasmonic chiroptical response are directly revealed, which enables the complete understanding of the chiral behavior in complex nanostructures. These findings are valuable for designing nanophotonic devices.<\/jats:p>","DOI":"10.1002\/nap2.70154","type":"journal-article","created":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T11:34:15Z","timestamp":1780486455000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Chiral Light\u2013Matter Interaction for Controlling Nanoplasmonic Fields"],"prefix":"10.1002","volume":"15","author":[{"given":"L\u00e1z\u00e1r","family":"T\u00f3th","sequence":"first","affiliation":[{"name":"ELI ALPS The Extreme Light Infrastructure ERIC  Szeged Hungary"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Judit","family":"Budai","sequence":"additional","affiliation":[{"name":"ELI ALPS The Extreme Light Infrastructure ERIC  Szeged Hungary"},{"name":"University of Szeged  Szeged 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