Ciret Charles, Alexander Koen, Poulvellarie Nicolas, Billet Maximilien, Mas Arabi Carlos, Kuyken Bart, Gorza Simon-Pierre, Leo François
Opt Express. 2020 Oct 12;28(21):31584-31593. doi: 10.1364/OE.402150.
The large index contrast and the subwalength tranverse dimensions of nanowires induce strong longitudinal electric field components. We show that these components play an important role for second harmonic generation in III-V wire waveguides. To illustrate this behavior, an efficiency map of nonlinear conversion is determined based on full-vectorial calculations. It reveals that many different waveguide dimensions and directions are suitable for efficient conversion of a fundamental quasi-TE pump mode around the 1550 nm telecommunication wavelength to a higher-order second harmonic mode.
