Reduced-Confinement GaAlAs Tapered-Waveguide Antenna Grown by Molecular-BeamEpitaxy

摘要

A reduced-confinement GaA1As tapered-waveguide antenna has been demonstrated.This device, produced by means of a novel growth technique using molecular-beam epitaxy, employs a longitudinal variation in the refractive index and thickness of the waveguide film to achieve reduced-mode confinement near the sample endface. In initial experiments this antenna has produced far-field beam divergences as narrow as 8.2 deg. full width at half-maximum (FWHM). Reprints. (RRH)