Abstract
We study the absorption spectrum of ordered arrays of strings of gold nanoparticles within a nematic liquid crystal by a rigorous electrodynamic approach. We find, in particular, that, as the length of the strings increases, light absorbance can be very high over the entire visible regime. The ordinary modes of the nematic liquid crystal allow the nanoparticle strings to absorb light much more efficiently than the extraordinary modes. Overall, absorption does not depend on the lattice type of the string array due to the subwavelength functionality of the system. Such a structure operates as a gray body exhibiting an absorption efficiency of 79% within the entire visible regime, averaging over all angles of incidence and polarization modes.
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