title: Assessment of waveguiding properties of gallium oxide nanostructures by angle resolved cathodoluminescence in a scanning electron microscope.
abstract: Cathodoluminescence (CL) of Ga(2)O(3) nanowires and planar microstructures has been studied in a scanning electron microscope, as a function of the orientation angle of the structures relative to the position of the light detection system in the microscope chamber. CL contrast shows a marked dependence on the detection angle due to the waveguiding behaviour of the structures. The angle resolved cathodoluminescence (ARCL) measurements enable to evaluate the optical losses of guided blue-ultraviolet light in nanowires with diameters in the sub-wavelength range, deposited on graphite tape or silicon. In planar, branched feather-like microstructures, ARCL images demonstrate the directional-dependent light guiding behaviour of the nano-branches.
authors: Departamento Física de Materiales, Universidad Complutense de Madrid 28040, Spain. emilio.nogales@fis.ucm.es
authors: Emilio
authors: E
authors: Nogales
authors: Bianchi
authors: B
authors: Méndez
authors: Javier
authors: J
authors: Piqueras