Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics III
Q 62.82: Poster
Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer
Search for non-resonant field enhancement in an isotropic nonlinear optical medium — •Rojiar Penjweini1,2, Marianne Bader1,2, Markus Sondermann1,2, and Gerd Leuchs1,2 — 1Max-Planck-Institute for the Science of Light, Erlangen, Germany — 2Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg, Erlangen, Germany
One mechanism for field enhancement is an imbalance in the amplitudes of incoming and outgoing dipole waves, which are usually of equal amplitude in the absence of an absorber. Here, we investigate the possibility to induce such an imbalance and hence field enhancement in a non-resonant nonlinear medium. More specific, we use a noble gas as an isotropic nonlinear medium and examine third harmonic generation. The dipole waves are generated by focusing radially polarized doughnut modes with a deep parabolic mirror. As an indication for field enhancement we look for an excess generation of third harmonic photons when increasing the solid angle. Besides the specific problem treated here, our setup opens the possibility for nonlinear optics in the strongly non-paraxial regime.