Continuous-Wave Second-Harmonic Generation in Orientation-Patterned Gallium Phosphide Waveguides at Telecom Wavelengths

Konstantinos Pantzas (1) , Sylvain Combrié (2) , Myriam Bailly (1, 2) , Raphaël Mandouze (2) , Francesco Rinaldo Talenti (2, 3) , Abdelmounaim Harouri (1) , Bruno Gérard , Grégoire Beaudoin (1) , Luc Le Gratiet (1) , Gilles Patriarche (1) , Alfredo de Rossi (2) , Yoan Léger (4) , Isabelle Sagnes (1) , Arnaud Grisard (2)

1 C2N - Centre de Nanosciences et de Nanotechnologies
2 Thales Research and Technology [Palaiseau]
3 UNIROMA - Università degli Studi di Roma "La Sapienza" = Sapienza University [Rome]
4 FOTON - Institut des Fonctions Optiques pour les Technologies de l'informatiON

A new process to produce orientation-patterned gallium phosphide (OP-GaP) on GaAs with almost perfectly parallel domain boundaries is presented. Taking advantage of the chemical selectivity between phosphides and arsenides, OP-GaP is processed into suspended shallow-ridge waveguides. Efficient second-harmonic generation from telecom wavelengths is achieved in both Type-I and Type-II polarisation configurations. The highest observed conversion efficiency is 200% W–1 cm–2, with a bandwidth of 2.67 nm in a 1 mm-long waveguide. The variation of the conversion efficiency with wavelength closely follows a squared cardinal sine function, in excellent agreement with theory, confirming the good uniformity of the poling period over the entire length of the waveguide.

Mots clés: Gallium Phosphide; Nonlinear Optics; Second Harmonic Generation; MOVPE

Domaines: Matériaux; Optique / photonique; Physique Quantique [quant-ph]

Konstantinos Pantzas, Sylvain Combrié, Myriam Bailly, Raphaël Mandouze, Francesco Rinaldo Talenti, et al.. Continuous-Wave Second-Harmonic Generation in Orientation-Patterned Gallium Phosphide Waveguides at Telecom Wavelengths. ACS photonics, 2022, 9 (6), pp.2032-2039. ⟨10.1021/acsphotonics.2c00156⟩. ⟨hal-03697190⟩