A nanowire optical nanocavity for broadband enhancement of spontaneous emission

Autor: Niels Gregersen, Saptarshi Kotal, Romain Fons, Jean-Michel Gérard, Matteo Finazzer, Y. Genuist, Andreas Dyhl Osterkryger, Joël Bleuse, Julien Claudon, Alberto Artioli, Yujing Wang
Přispěvatelé: Nanophysique et Semiconducteurs (NPSC), PHotonique, ELectronique et Ingénierie QuantiqueS (PHELIQS), Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), DTU Fotonik, Danmarks Tekniske Universitet = Technical University of Denmark (DTU), Epitaxie et couches minces (NEEL- EpiCM), Institut Néel (NEEL), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), ANR-19-CE47-0009,IPOD,Source efficace de photons intriqués et indiscernables à la demande(2019)
Rok vydání: 2021
Předmět:
Zdroj: Applied Physics Letters
Applied Physics Letters, 2021, 118 (19), pp.194002. ⟨10.1063/5.0045834⟩
Kotal, S, Artioli, A, Wang, Y, Østerkryger, A D, Finazzer, M, Fons, R, Genuist, Y, Bleuse, J, Gérard, J-M, Gregersen, N & Claudon, J 2021, ' A nanowire optical nanocavity for broadband enhancement of spontaneous emission ', Applied Physics Letters, vol. 118, no. 19, 194002 . https://doi.org/10.1063/5.0045834
ISSN: 1077-3118
0003-6951
DOI: 10.1063/5.0045834
Popis: International audience; To deliver an optimal performance for photonic quantum technologies, semiconductor quantum dots should be integrated in a carefully designed photonic structure. Here, we introduce a nanowire optical nanocavity designed for free-space emission. Thanks to its ultrasmall mode volume, this simple structure offers a large acceleration of spontaneous emission (predicted Purcell factor of 6.3) that is maintained over a 30-nm bandwidth. In addition, a dielectric screening effect strongly suppresses the emission into the 3D continuum of radiation modes. The fraction of spontaneous emission funneled into the cavity mode reaches 0.98 at resonance and exceeds 0.95 over a 100-nm spectral range. Close-to-optimal collection efficiency is maintained over an equivalent bandwidth and reaches a predicted value of 0.54 at resonance for a first lens with a numerical aperture (NA) of 0.75. As a first experimental demonstration of this concept, we fabricate an Au–SiO2–GaAs device embedding isolated InAs quantum dots. We measure a maximal acceleration of spontaneous emission by a factor as large as 5.6 and a bright quantum dot emission (collection efficiency of 0.35 into NA¼0.75). This nanowire cavity constitutes a promising building block to realize advanced sources of quantum light for a broad range of material systems.
Databáze: OpenAIRE
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