期刊
OPTICS EXPRESS
卷 15, 期 19, 页码 11781-11789出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.15.011781
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We present 2D measurements of the full THz electric field behind a sample consisting of multiple slits in a metal foil. Our measurements, which have a sub-wavelength spatial, and a sub-period temporal resolution, reveal electric field lines, electric field vortices and saddle points. From our measurements we are able to reconstruct the magnetic field and, finally, the position and time-dependent Poynting vector which shows the flow of energy behind the sample. Our results show that it is possible to study the flow of light near sub-wavelength plasmonic structures such as slit-arrays and, by implication, other metamaterial samples. (C) 2007 Optical Society of America
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