| 摘要 |
<p>The present invention relates to a plasmonic structure (10) comprising a substrate and an electro conductor (12) provided in or on the substrate (11). The electro conductor (12) comprises a first part (13) configured to provide a first series of plasmon resonance modes (for incident radiation of a first wavelength) and a second part (14) configured to provide a second series of plasmon resonance modes (for incident radiation of a second wavelength). The first and second part are functionally connected in a linkage region (15), where the electro conductor (12) is shaped such as to form a capacitive gap (16). The electro conductor (12) is furthermore configured to direct radiation incident on the plasmonic structure of a first wavelength predominantly toward a first direction and to direct radiation incident on the plasmonic structure of a second wavelength predominantly toward a second direction, in which the first direction and the second direction are separated by an angle of at least 60°.</p> |
