Microring resonators made of materials with a zinc-blend or diamond lattice allow exploiting their 4-bar symmetry to achieve quasi-phase matching condition for second-order optical nonlinearities. However, fabrication tolerances impose severe limits on the quasi-phase matching condition, which in turn degrades the generation efficiency. Here, we present a method to mitigate these limitations. As an example, we studied the geometry and the pump wavelength conditions to induce the second-harmonic generation in silicon-based microrings with a second-order susceptibility χ(2) zxy ̸≠ 0. We found the best compromises between performances and experimental requirements, and we unveil a strategy to minimize the impacts of fabrication defects. The method can be easily transferred to other material systems.

Robust geometries for second-harmonic-generation in microrings exhibiting a 4-bar symmetry / Guilleme, P.; Vecchi, C.; Castellan, C.; Signorini, S.; Ghulinyan, M.; Bernard, M.; Parisi, M.; Pavesi, L.. - In: APPLIED SCIENCES. - ISSN 2076-3417. - 10:24(2020), pp. 1-12. [10.3390/app10249047]

Robust geometries for second-harmonic-generation in microrings exhibiting a 4-bar symmetry

Guilleme P.;Vecchi C.;Castellan C.;Signorini S.;Ghulinyan M.;Bernard M.;Parisi M.;Pavesi L.
2020-01-01

Abstract

Microring resonators made of materials with a zinc-blend or diamond lattice allow exploiting their 4-bar symmetry to achieve quasi-phase matching condition for second-order optical nonlinearities. However, fabrication tolerances impose severe limits on the quasi-phase matching condition, which in turn degrades the generation efficiency. Here, we present a method to mitigate these limitations. As an example, we studied the geometry and the pump wavelength conditions to induce the second-harmonic generation in silicon-based microrings with a second-order susceptibility χ(2) zxy ̸≠ 0. We found the best compromises between performances and experimental requirements, and we unveil a strategy to minimize the impacts of fabrication defects. The method can be easily transferred to other material systems.
2020
24
Guilleme, P.; Vecchi, C.; Castellan, C.; Signorini, S.; Ghulinyan, M.; Bernard, M.; Parisi, M.; Pavesi, L.
Robust geometries for second-harmonic-generation in microrings exhibiting a 4-bar symmetry / Guilleme, P.; Vecchi, C.; Castellan, C.; Signorini, S.; Ghulinyan, M.; Bernard, M.; Parisi, M.; Pavesi, L.. - In: APPLIED SCIENCES. - ISSN 2076-3417. - 10:24(2020), pp. 1-12. [10.3390/app10249047]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/287249
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