title: Local nanofluidic light sources in silicon photonic crystal microcavities.
abstract: We report on the realization of a rewritable and local source inside a Si-based photonic crystal microcavity by infiltrating a solution of colloidal PbS quantum dots inside a single pore of the structure. We show that the resulting spontaneous emission from the source is both spatially and spectrally redistributed due to the mode structure of the photonic crystal cavity. The coupling of the quantum dot emission to the cavity mode is analyzed by mapping the luminescence signal of the infiltrated solution with a scanning near-field optical microscope at room temperature. Spectral characterization and the mode profile are in good agreement with a three-dimensional numerical calculation of the system.
authors.affiliation: European Laboratory for Non-linear Spectroscopy (LENS), Via N. Carrara, 1, I-50019 Sesto Fiorentino Firenze, Italy. vignolini@lens.unifi.it
authors.forename: Silvia
authors.initials: S
authors.lastname: Vignolini
authors.forename: Francesco
authors.initials: F
authors.lastname: Riboli
authors.forename: Francesca
authors.initials: F
authors.lastname: Intonti
authors.forename: Michele
authors.initials: M
authors.lastname: Belotti
authors.forename: Massimo
authors.initials: M
authors.lastname: Gurioli
authors.forename: Yong
authors.initials: Y
authors.lastname: Chen
authors.forename: Marcello
authors.initials: M
authors.lastname: Colocci
authors.forename: Lucio Claudio
authors.initials: LC
authors.lastname: Andreani
authors.forename: Diederik S
authors.initials: DS
authors.lastname: Wiersma