期刊
OPTICS LETTERS
卷 42, 期 21, 页码 4287-4290出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.42.004287
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资金
- Consiglio Nazionale delle Ricerche (CNR)
- SATT IdF-Innov
- Ministero dell'Universita e della Ricerca (PRIN-KEZNYM)
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 chi((2)) whispering-gallery-mode microdisk, obtaining second-harmonic generation in the optical telecom wavelength range. With a radius of curvature of 50 mu m 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. (C) 2017 Optical Society of America
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