Details

Autor(en) / Beteiligte

• Kilbane, Deirdre
• Prinz, Eva
• Eul, Tobias
• Hartelt, Michael
• Mahro, Anna-Katharina
• Hensen, Matthias
• Pfeiffer, Walter
• Aeschlimann, Martin

Titel

Plasmonic wavelength-dependent optical switch

Ist Teil von

• Optics express, 2023-03, Vol.31 (6), p.9579-9590

Ort / Verlag

United States

Erscheinungsjahr

2023

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We design and experimentally demonstrate an optical switch based on the interference of plasmonic modes in whispering gallery mode (WGM) antennas. Simultaneous excitation of even and odd WGM modes, enabled by a small symmetry breaking via non-normal illumination, allows switching the plasmonic near field between opposite sides of the antenna, depending on the excitation wavelength used in a wavelength range of 60 nm centered around 790 nm. This proposed switching mechanism is experimentally demonstrated by combining photoemission electron microscopy (PEEM) with a tunable wavelength femtosecond laser source in the visible and infrared.