title: Vertical "III-V" V-shaped nanomembranes epitaxially grown on a patterned Si[001] substrate and their enhanced light scattering.
abstract: We report on a new form of III-V compound semiconductor nanostructures growing epitaxially as vertical V-shaped nanomembranes on Si(001) and study their light-scattering properties. Precise position control of the InAs nanostructures in regular arrays is demonstrated by bottom-up synthesis using molecular beam epitaxy in nanoscale apertures on a SiO(2) mask. The InAs V-shaped nanomembranes are found to originate from the two opposite facets of a rectangular pyramidal island nucleus and extend along two opposite <111> B directions, forming flat {110} walls. Dark-field scattering experiments, in combination with light-scattering theory, show the presence of distinctive shape-dependent optical resonances significantly enhancing the local intensity of incident electromagnetic fields over tunable spectral regions. These new nanostructures could have interesting potential in nanosensors, infrared light emitters, and nonlinear optical elements.
authors.affiliation: Laboratoire des Matériaux Semiconducteurs, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
authors.forename: Sònia
authors.initials: S
authors.lastname: Conesa-Boj
authors.forename: Eleonora
authors.initials: E
authors.lastname: Russo-Averchi
authors.forename: Anna
authors.initials: A
authors.lastname: Dalmau-Mallorqui
authors.forename: Jacob
authors.initials: J
authors.lastname: Trevino
authors.forename: Emanuele F
authors.initials: EF
authors.lastname: Pecora
authors.forename: Carlo
authors.initials: C
authors.lastname: Forestiere
authors.forename: Alex
authors.initials: A
authors.lastname: Handin
authors.forename: Martin
authors.initials: M
authors.lastname: Ek
authors.forename: Ludovit
authors.initials: L
authors.lastname: Zweifel
authors.forename: L Reine
authors.initials: LR
authors.lastname: Wallenberg
authors.forename: Daniel
authors.initials: D
authors.lastname: Rüffer
authors.forename: Martin
authors.initials: M
authors.lastname: Heiss
authors.forename: David
authors.initials: D
authors.lastname: Troadec
authors.forename: Luca
authors.initials: L
authors.lastname: Dal Negro
authors.forename: Philippe
authors.initials: P
authors.lastname: Caroff
authors.forename: Anna
authors.initials: A
authors.lastname: Fontcuberta i Morral