A device for selectively coupling incident electromagnetic visible or infrared radiation comprising: a selective surface comprising: a first electrically conductive layer (12,32) including a plurality of discrete electrically conductive surface elements (20,34), said surface elements having a size of less than 50 microns; an electrically isolating intermediate layer defining a first surface in communication with the electrically conductive surface layer; and a second, continuous electrically conductive layer in communication with a second surface of the electrically isolating intermediate layer, the selective surface having a primary resonant absorption band having a corresponding primary resonance and a secondary resonant absorption band having a corresponding secondary resonance each selectively absorbing incident visible or infrared radiation responsive to a resonant coupling between the plurality of surface elements and the continuous electrically conductive layer, wherein: the resonant wavelength associated with the primary resonance is determined by a maximum dimension of the electrically conductive surface elements; the wavelength associated with the secondary absorption band corresponds at least in part to a center-to-center spacing of the electrically conductive surface elements, and. wherein the primary resonant absorption band has a central wavelength λc and a bandwidth Δλ, where Δλ/ λc is 0.1 or less; characterised in that the surface layer (12, 32) has a thickness equal to or greater than one skin depth of the incident radiation at a wavelength of the primary resonance. a selective surface comprising: a first electrically conductive layer (12,32) including a plurality of discrete electrically conductive surface elements (20,34), said surface elements having a size of less than 50 microns; an electrically isolating intermediate layer defining a first surface in communication with the electrically conductive surface layer; and a second, continuous electrically conductive layer in communication with a second surface of the electrically isolating intermediate layer, the selective surface having a primary resonant absorption band having a corresponding primary resonance and a secondary resonant absorption band having a corresponding secondary resonance each selectively absorbing incident visible or infrared radiation responsive to a resonant coupling between the plurality of surface elements and the continuous electrically conductive layer, wherein: the resonant wavelength associated with the primary resonance is determined by a maximum dimension of the electrically conductive surface elements; the wavelength associated with the secondary absorption band corresponds at least in part to a center-to-center spacing of the electrically conductive surface elements, and. a first electrically conductive layer (12,32) including a plurality of discrete electrically conductive surface elements (20,34), said surface elements having a size of less than 50 microns; an electrically isolating intermediate layer defining a first surface in communication with the electrically conductive surface layer; and a second, continuous electrically conductive layer in communication with a second surface of the electrically isolating intermediate layer, the selective surface having a primary resonant absorption band having a corresponding primary resonance and a secondary resonant absorption band having a corresponding secondary resonance each selectively absorbing incident visible or infrared radiation responsive to a resonant coupling between the plurality of surface elements and the continuous electrically conductive layer, wherein: the resonant wavelength associated with the primary resonance is determined by a maximum dimension of the electrically conductive surface elements; the wavelength associated with the secondary absorption band corresponds at least in part to a center-to-center spacing of the electrically conductive surface elements, and. the resonant wavelength associated with the primary resonance is determined by a maximum dimension of the electrically conductive surface elements; the wavelength associated with the secondary absorption band corresponds at least in part to a center-to-center spacing of the electrically conductive surface elements, and.