title: Monolithic AlGaAs second-harmonic nanoantennas.
abstract: We demonstrate monolithic aluminum gallium arsenide (AlGaAs) optical nanoantennas. Using a selective oxidation technique, we fabricated epitaxial semiconductor nanocylinders on an aluminum oxide substrate. Second harmonic generation from AlGaAs nanocylinders of 400 nm height and varying radius pumped with femtosecond pulses delivered at 1554-nm wavelength has been measured, revealing a peak conversion efficiency exceeding 10-5for nanocylinders with an optimized geometry.
authors.forename: V F
authors.initials: VF
authors.lastname: Gili
authors.forename: L
authors.initials: L
authors.lastname: Carletti
authors.forename: A
authors.initials: A
authors.lastname: Locatelli
authors.forename: D
authors.initials: D
authors.lastname: Rocco
authors.forename: M
authors.initials: M
authors.lastname: Finazzi
authors.forename: L
authors.initials: L
authors.lastname: Ghirardini
authors.forename: I
authors.initials: I
authors.lastname: Favero
authors.forename: C
authors.initials: C
authors.lastname: Gomez
authors.forename: A
authors.initials: A
authors.lastname: Lemaître
authors.forename: M
authors.initials: M
authors.lastname: Celebrano
authors.forename: C
authors.initials: C
authors.lastname: De Angelis
authors.forename: G
authors.initials: G
authors.lastname: Leo