Journal
OPTICAL MATERIALS EXPRESS
Volume 1, Issue 1, Pages 36-45Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.1.000036
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- University of Leuven (GOA)
- Flemish government
- Belgian Inter-University
- Russian Foundation for Basic Research (RFBR)
- UK Engineering and Physical Sciences Research Council (EPSRC)
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Novel ways to detect the handedness in chiral optical metamaterials by means of the second harmonic generation (SHG) process have recently been proposed. However, the precise origin of the SHG emission has yet to be unambiguously established. In this paper, we present computational simulations of both the electric currents and the electromagnetic fields in chiral planar metamaterials, at the fundamental frequency (FF), and discuss the implications of our results on the characteristics of experimentally measured SHG. In particular, we show that the results of our numerical simulations are in good agreement with the experimental mapping of SHG sources. Thus, the SHG in these metamaterials can be attributed to a strong local enhancement of the electromagnetic fields at the FF, which depends on the particular structure of the patterned metamaterial. (C) 2011 Optical Society of America
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