We report on the experimental observation of quasi-phase matching in a homogeneous waveguide. By fabricating a monolithic snake-shaped suspended AlGaAs nanowire on a (001) GaAs wafer, we demonstrate the unraveled version of a χ 2 whispering-gallery-mode microdisk, obtaining second-harmonic generation in the optical telecom wavelength range. With a radius of curvature of 50 μm and four spatial oscillations along the (110) average direction, a splitting of the second-harmonic spectrum occurs around the phase-matching wavelength of the corresponding straight waveguide. This splitting, which increases as the radius of curvature decreases, provides a useful degree of freedom for the design of small-footprint nonlinear photonic devices on-chip.

Directionally induced quasi-phase matching in homogeneous AlGaAs waveguides / Morais, N.; Roland, I.; Ravaro, M.; Hease, W.; Lemaître, A.; Gomez, C.; Wabnitz, Stefan; De Rosa, M.; Favero, I.; Leo, G.. - In: OPTICS LETTERS. - ISSN 0146-9592. - 42:21(2017), p. 4287. [10.1364/OL.42.004287]

Directionally induced quasi-phase matching in homogeneous AlGaAs waveguides

WABNITZ, Stefan;
2017

Abstract

We report on the experimental observation of quasi-phase matching in a homogeneous waveguide. By fabricating a monolithic snake-shaped suspended AlGaAs nanowire on a (001) GaAs wafer, we demonstrate the unraveled version of a χ 2 whispering-gallery-mode microdisk, obtaining second-harmonic generation in the optical telecom wavelength range. With a radius of curvature of 50 μm and four spatial oscillations along the (110) average direction, a splitting of the second-harmonic spectrum occurs around the phase-matching wavelength of the corresponding straight waveguide. This splitting, which increases as the radius of curvature decreases, provides a useful degree of freedom for the design of small-footprint nonlinear photonic devices on-chip.
2017
Optical frequency combs; integrated optics; Kerr effect
01 Pubblicazione su rivista::01f Lettera, Nota
Directionally induced quasi-phase matching in homogeneous AlGaAs waveguides / Morais, N.; Roland, I.; Ravaro, M.; Hease, W.; Lemaître, A.; Gomez, C.; Wabnitz, Stefan; De Rosa, M.; Favero, I.; Leo, G.. - In: OPTICS LETTERS. - ISSN 0146-9592. - 42:21(2017), p. 4287. [10.1364/OL.42.004287]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1214460
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