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Cathodoluminescence spectroscopy of plasmonic patch antennas: Towards lower order and higher energies

Publié le 29 mars 2018
Cathodoluminescence spectroscopy of plasmonic patch antennas: Towards lower order and higher energies
Auteurs
Jeannin M., Rochat N., Kheng K., Nogues G.
Year2017-0177
Source-TitleOptics Express
Affiliations
Univ. Grenoble Alpes, Grenoble, France, CNRS, Inst. NEEL, Nanophysique et semiconducteurs group, Grenoble, France, CEA, LETI, MINATEC Campus, Grenoble, France, CEA, INAC, Nanophysique et semiconducteurs Group, Grenoble, France
Abstract
We report on the cathodoluminescence characterization of Au, Al and a Au/Al bimetal circular plasmonic patch antennas, with disk diameter ranging from 150 to 900 nm. It allows us access to monomode operation of the antennas down to the fundamental dipolar mode, in contrast to previous studies on similar systems. Moreover we show that we can shift the operation range of the antennas towards the blue spectral range by using Al. Our experimental results are compared to a semi-analytical model that provides qualitative insight on the mode structure sustained by the antennas. © 2017 Optical Society of America.
Author-Keywords
 
Index-Keywords
Aluminum, Antennas, Cathodoluminescence, Plasmons, Slot antennas, Cathodoluminescence spectroscopy, Dipolar modes, Disk diameters, Mode structure, Operation range, Semi-analytical model, Spectral range, Microstrip antennas
ISSN10944087
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