Patent ID: 8552410

Claim:
A radiation-emitting device for generating a radiation emission, the radiation-emitting device including: an active region configured to generate a radiation emission linearly polarized along a first polarization direction; a device facet covered by an insulating layer and a metal layer on the insulating layer, wherein the metal layer defines an aperture through which the radiation emission from the active region can be transmitted and coupled into surface plasmons on an outer side of the metal layer, and wherein the aperture is in the form of a slit including a long axis that is non-orthogonal to the first polarization direction; and a sequential series of features defined in or on the device facet or in the metal layer and spaced apart from the aperture and along an axis that is orthogonal to the long axis of the aperture, wherein the series of features are configured to manipulate the surface plasmons and to scatter surface plasmons into the far field with a second polarization direction distinct from the first polarization direction.