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1 May 2015 Plasmonic nanoantenna coherent absorption switches for integrated photonics
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We investigate chains of plasmonic gold nano-antennas as coherent perfect absorbers on silicon waveguides by means of 3D finite-difference time-domain simulations. In such structures, absorption can be tuned to any percentage by manipulating the phase relation of two counterpropagating waves in the waveguide. Thus, they find applications as ultracompact all-optical switches and modulators in coherent networks. We show that the choice of the waveguide cross section has significant influence on the performance of individual nano-antennas. As a result, the length of the chain of antennas for perfect coherent absorption varies strongly with the waveguide cross section. We analyze the implications of this dependency on the fabrication process.
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Otto L. Muskens and Roman Bruck "Plasmonic nanoantenna coherent absorption switches for integrated photonics ", Proc. SPIE 9516, Integrated Optics: Physics and Simulations II, 95160H (1 May 2015);

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