Mode Structure of Planar Optical Antennas on Dielectric Substrates
This research was supported by the US-DOE Office of Science (Office of Basic Energy Sciences) under Contract No. DE-FG02-07ER46406.
We report a numerical study, supported by photoemission electron microscopy (PEEM), of sub-micron planar optical antennas on transparent substrate. We find these antennas generate intricate near-field spatial field distributions with odd and even numbers of nodes. We show that the field distributions are primarily superpositions of planar surface plasmon polariton modes confined to the metal/substrate interface. The mode structure provides opportunities for coherent switching and optical control in sub-micron volumes.
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Word, Robert Campbell and Kӧnenkamp, Rolf, "Mode Structure of Planar Optical Antennas on Dielectric Substrates" (2016). Physics Faculty Publications and Presentations. 256.