August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【208】Cubic response of 2-dimensional charge layers

Aug 31, 2021, 3:15 PM
Room C

Room C

Talk Surfaces, Interfaces and Thin Films Surfaces, Interfaces and Thin Films


Helga Böhm (JKU Linz)


Nonlinear nanoscale optics, a success story driven by ultra-short laser pulses of immense power, commonly invokes surface plasmons, highly sensitive to details of the tightly confined electric field. Intrinsically 2D materials like graphene or so-called TMDs additionally offer gate-tunability of their nonlinear response.
We develop the spectral representation of $n$th order response functions in general, then focus on the cubic longitudinal density response of charge carriers in semiconductor heterostructures. Depending on the perturbing signal, collective and single-particle modes give a rich spectrum displaying multifaceted frequency mixing. We further discuss spin-/valley-polarized systems, relevant in plasmonics, and give preliminary results for graphene.

Primary authors

Helga Böhm (JKU Linz) Mr Mario Graml (JKU) Mr Dominik Kreil (JKU)


Mr Maximilian Schober (JKU)

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