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Widely Tunable Infrared Plasmonic Nanoantennas Using Directed Assembly
Author(s) -
Fontana Jake,
Nita Rafaela,
Charipar Nicholas,
Naciri Jawad,
Park Kyoungweon,
Dunkelberger Adam,
Owrutsky Jeff,
Piqué Alberto,
Vaia Richard,
Ratna Banahalli
Publication year - 2017
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201700335
Subject(s) - plasmon , infrared , materials science , absorption (acoustics) , optoelectronics , nanoscopic scale , nanotechnology , optics , physics , composite material
Infrared plasmonic nanoantennas are key building blocks in nanotechnology. By coupling and confining light into spatial volumes below the diffraction limit, infrared plasmonic nanoantennas provide unique opportunities to sense and signal at nanometer length scales for energy harvesting, as light sources, and in nanomedicine applications. However, in contrast to their radio‐ and microwave counterparts, widespread use of plasmonic nanoantennas has been limited, due in part to the inability to synthesize these structures maintaining nanoscale precision in large batches with uniform yields. This communication describes a directed assembly approach to generate large quantities of infrared plasmonic nanoantennas with sharp and widely tunable absorption peaks from 1 to 3 µm. It is experimentally demonstrated that the nanoantenna absorption peak depends linearly on the chain length, in agreement with simulations, providing a straightforward means to understand and predict the infrared response of these materials.