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Second-harmonic optical circular dichroism of plasmonic chiral helicoid-III nanoparticles
Florian Spreyer, Jungho Mun, Hyeohn Kim +4
While plasmonic particles can provide optical resonances in a wide spectral range from the lower visible up to the near-infrared, often symmetry effects are utilized to obtain part…
Influence of plasmon resonances and symmetry effects on second harmonic generation in WS2-plasmonic hybrid metasurfaces
Florian Spreyer, Claudia Ruppert, Philip Georgi +1
The nonlinear process of second harmonic generation (SHG) in monolayer (1L) transition metal dichalcogenides (TMD), like , strongly depends on the polarization state of the e…
A nonlinear metasurface combining telecom-range intersubband transitions in GaN/AlN quantum wells with resonant plasmonic antenna arrays
Jan Mundry, Florian Spreyer, Valentin Jmerik +3
We realize and investigate a nonlinear metasurface taking advantage of intersubband transitions in ultranarrow GaN/AlN multi-quantum well heterostructures. Owing to huge band offse…
Second-harmonic imaging of plasmonic Pancharatnam-Berry phase metasurfaces coupled to monolayers of WS2
Florian Spreyer, Ruizhe Zhao, Lingling Huang +1
The nonlinear processes of frequency conversion like second harmonic generation (SHG) usually obey certain selection rules, resulting from the preservation of different kind of phy…