title: Scanning Fabry-Pérot interferometer with largely tuneable free spectral range for high resolution spectroscopy of single quantum dots.
abstract: We report on the implementation of a scanning Fabry-Pérot interferometer for photoluminescence spectroscopy investigation. We choose a conveniently small reflectivity of the two planar semitransparent mirrors which, in spite of a moderate cavity finesse, ensures a good mechanical stability over a long time. We also exploit the large tuneability of the cavity length (i.e., of the free spectral range) for changing the spectral resolution over two order of magnitude (from ~300 μeV to ~4 μeV in full width at half maximum). Such a characteristic easily allows to scan both sharp and broad luminescence bands. We test our Fabry-Pérot interferometer on sharp photoluminescence lines resulting from excitonic recombination in self-assembled GaAs quantum dots. We demonstrate the ability of our system to resolve linewidth as small as 4 μeV.
authors.affiliation: National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan. Marco.Abbarchi@lpa.ens.fr
authors.forename: Marco
authors.initials: M
authors.lastname: Abbarchi
authors.forename: Takashi
authors.initials: T
authors.lastname: Kuroda
authors.forename: Romain
authors.initials: R
authors.lastname: Duval
authors.forename: Takaaki
authors.initials: T
authors.lastname: Mano
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Sakoda