title: Far-field imaging of optical second-harmonic generation in single GaN nanowires.
abstract: Means for assessing the nonlinear optical properties of nanoscale materials are of key importance for the advancement of active nanophotonics. By correlating second-harmonic generation (SHG) with electron backscattered diffraction from single GaN nanowires (NWs), we demonstrate that far-field microscopic imaging of SHG offers an approach for distinguishing crystallographic orientations of NWs lying on a substrate. The quasi-static approximation, which should prove useful in describing many nanophotonic behaviors, is shown to satisfactorily account for the SHG data.
authors.affiliation: U.S. Naval Research Laboratory, Washington, DC 20375, USA.
authors.forename: J P
authors.initials: JP
authors.lastname: Long
authors.forename: B S
authors.initials: BS
authors.lastname: Simpkins
authors.forename: D J
authors.initials: DJ
authors.lastname: Rowenhorst
authors.forename: P E
authors.initials: PE
authors.lastname: Pehrsson