Bending Gold Nanorods with Light.
V-shaped gold nanoantennas are the functional components of plasmonic metasurfaces, which are capable of manipulating light in unprecedented ways. Designing a metasurface requires the custom arrangement of individual antennas with controlled shape and orientation. Here, we show how highly crystalline gold nanorods in solution can be bent, one-by-one, into a V-shaped geometry and printed to the surface of a solid support through a combination of plasmonic heating and optical force. Significantly, we demonstrate that both the bending angle and the orientation of each rod-antenna can be adjusted independent from each other by tuning the laser intensity and polarization. This approach is applicable for the patterning of V-shaped plasmonic antennas on almost any substrate, which holds great potential for the fabrication of ultrathin optical components and devices.
Photonics and Optoelectronics Group, Department of Physics and Center for NanoScience (CeNS), LMU München , Amalienstraße 54, Munich 80799, Germany.
Anastasia
A
Babynina
Photonics and Optoelectronics Group, Department of Physics and Center for NanoScience (CeNS), LMU München , Amalienstraße 54, Munich 80799, Germany.
Michael
M
Fedoruk
Photonics and Optoelectronics Group, Department of Physics and Center for NanoScience (CeNS), LMU München , Amalienstraße 54, Munich 80799, Germany.
Paul
P
Kühler
EMAT, University of Antwerp , Groenenborgerlaan 171, 2020 Antwerp, Belgium.
Alexander
A
Meledin
Department of Chemistry, LMU München , Butenandtstraße 5-13 (E), 81377 Munich, Germany.
Markus
M
Döblinger
Photonics and Optoelectronics Group, Department of Physics and Center for NanoScience (CeNS), LMU München , Amalienstraße 54, Munich 80799, Germany.|Nanosystems Initiative Munich (NIM), Schellingstraße 4, 80539 Munich, Germany.
Theobald
T
Lohmüller
V-shaped nanoantennas; gold nanorods; optical forces; plasmonic heating