Attilio Zillihttps://orcid.org/0000-0003-1845-6850,1 Agostino Di Francescantonio,1 Davide Rocco,2 Fabrizio Conti,1 Vincent Vinel,3 Adrien Borne,3 Aristide Lemaître,4 Paolo Biagioni,1 Lamberto Duò,1 Costantino De Angelis,2,5 Giuseppe Leo,3 Marco Finazzi,1 Michele Celebrano1
1Politecnico di Milano (Italy) 2Univ. degli Studi di Brescia (Italy) 3Univ. Paris Cité, CNRS, Lab. Matériaux et Phénomènes Quantiques (France) 4Univ. Paris-Saclay, CNRS, Ctr. de Nanosciences et de Nanotechnologies (France) 5Istituto Nazionale di Ottica (Italy)
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We propose a dual-beam pumping scheme whereby a pulse of telecom frequency ω (1550 nm wavelength) is mixed with its frequency-doubled replica at 2ω. This brings about sum-frequency generation at ω+2ω = 3ω on top of third harmonic at ω+ω+ω = 3ω. We exploited the diffraction by an AlGaAs metasurface for realizing the symmetry breaking which is key to avoid averaging out the interference between the two coherent frequency-tripling pathways. The upconverted light can thereby be routed into different diffraction orders with high selectivity, based on the pumps’ relative phase, providing a platform for GHz-rate amplitude modulation and information encoding.
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Attilio Zilli, Agostino Di Francescantonio, Davide Rocco, Fabrizio Conti, Vincent Vinel, Adrien Borne, Aristide Lemaître, Paolo Biagioni, Lamberto Duò, Costantino De Angelis, Giuseppe Leo, Marco Finazzi, Michele Celebrano, "Interferometric all-optical routing of upconverted light by dielectric metasurfaces," Proc. SPIE PC12646, Metamaterials, Metadevices, and Metasystems 2023, PC126460Q (4 October 2023); https://doi.org/10.1117/12.2677509