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Abstract

An asymmetric waveguide layer which includes a metal film having an array of apertures defined in the metal film. The apertures extend from a first surface of the metal film to a second surface of the metal film. A plurality of photons have a wavelength of about X propagate through the asymmetric waveguide layer in one direction, and are substantially prevented from propagating in the other direction. An integrated solar cell is also described. First and second PV layers are disposed adjacent to and optically coupled to the asymmetric waveguide layer. A reflective layer is disposed adjacent to and optically coupled to the second PV layer second surface. Light passing through the asymmetric waveguide is substantially trapped within the second PV layer by a combination of reflection from the reflective layer and reflection by the asymmetric waveguide layer.

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First Claim