title: Scalable high-precision tuning of photonic resonators by resonant cavity-enhanced photoelectrochemical etching.
abstract: Photonic lattices of mutually interacting indistinguishable cavities represent a cornerstone of collective phenomena in optics and could become important in advanced sensing or communication devices. The disorder induced by fabrication technologies has so far hindered the development of such resonant cavity architectures, while post-fabrication tuning methods have been limited by complexity and poor scalability. Here we present a new simple and scalable tuning method for ensembles of microphotonic and nanophotonic resonators, which enables their permanent collective spectral alignment. The method introduces an approach of cavity-enhanced photoelectrochemical etching in a fluid, a resonant process triggered by sub-bandgap light that allows for high selectivity and precision. The technique is presented on a gallium arsenide nanophotonic platform and illustrated by finely tuning one, two and up to five resonators. It opens the way to applications requiring large networks of identical resonators and their spectral referencing to external etalons.
authors.affiliation: Matériaux et Phénomènes Quantiques, Université Paris Diderot, CNRS UMR 7162, Sorbonne Paris-Cité, 10 rue Alice Domon et Léonie Duquet, Paris 75013, France.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Gil-Santos
authors.affiliation: Matériaux et Phénomènes Quantiques, Université Paris Diderot, CNRS UMR 7162, Sorbonne Paris-Cité, 10 rue Alice Domon et Léonie Duquet, Paris 75013, France.
authors.forename: Christopher
authors.identifier: 0000-0002-9391-2468
authors.initials: C
authors.lastname: Baker
authors.affiliation: Laboratoire de Photonique et de Nanostructures, Route de Nozay, CNRS, Marcoussis 91460, France.
authors.forename: Aristide
authors.initials: A
authors.lastname: Lemaître
authors.affiliation: Laboratoire de Photonique et de Nanostructures, Route de Nozay, CNRS, Marcoussis 91460, France.
authors.forename: Carmen
authors.initials: C
authors.lastname: Gomez
authors.affiliation: Matériaux et Phénomènes Quantiques, Université Paris Diderot, CNRS UMR 7162, Sorbonne Paris-Cité, 10 rue Alice Domon et Léonie Duquet, Paris 75013, France.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Leo
authors.affiliation: Matériaux et Phénomènes Quantiques, Université Paris Diderot, CNRS UMR 7162, Sorbonne Paris-Cité, 10 rue Alice Domon et Léonie Duquet, Paris 75013, France.
authors.forename: Ivan
authors.initials: I
authors.lastname: Favero