Berlin 2018 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 29: Focussed Session: Metasurfaces I
HL 29.2: Hauptvortrag
Mittwoch, 14. März 2018, 15:30–16:00, EW 201
Harmonic generation and photon management at the nanoscale in AlGaAs nanoantennas — •Costantino De Angelis1, Dragomir Neshev2, Luca Carletti1, Lavinia Ghirardini3, Davide Rocco1, Valerio Gili4, Giovanni Pellegrini3, Marco Finazzi3, Andrea Locatelli1, Ivan Favero4, Giuseppe Marino4, Michele Celebrano3, and Giuseppe Leo4 — 1Department of Information Engineering, University of Brescia, 25123 Brescia, Italy — 2Nonlinear Physics Centre, The Australian National University, Canberra ACT 2601, Australia — 3Department of Physics, Politecnico di Milano, 20133 Milano, Italy — 4Matériaux et Phénomènes Quantiques, Université Paris Diderot, 75013 Paris, France
High-permittivity semiconductor resonators are emerging as potential platforms for nonlinear nanophotonics due to a rich variety of resonances, lossless operation, and strong volume nonlinearity. Harnessing these aspects can lead to efficient and controlled nonlinear light generation in nanoscale devices. In this work, we review recent advances for efficient frequency conversion and tunable control of the spatial and polarization properties of the emitted photons exploiting second order nonlinear processes in AlGaAs nanoantennas. By means of both numerical and experimental approaches, we demonstrate dynamic control over the directionality of the second harmonic radiation pattern generated in nanodisks by varying the angle of incidence of the pump beam and the shape of nanoresonator.