Importance

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Abstract

Devices incorporating an interferometric stack configured to reflect a certain color and transmit longer wavelengths through the interferometric stack. In one example, a color filtering includes two partial reflectors comprising an extinction coefficient that is less than about one at wavelengths greater than about 800 nm. The two partial reflectors define an optical resonant cavity forming an interferometric stack configured to reflect color and transmit some electromagnetic waves. In another example, a photovoltaic device includes two photovoltaic active layers that act as partial reflectors to form an interferometric stack. The photovoltaic device is configured to reflect color and produce power.

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First Claim