Abstract
We report a theoretical research for the condition of
electromagnetic shield breaching when a narrow aperture is punctured in
thin metal film. To calculate electromagnetic field transmission through a
narrow slit, a Rayleigh wave expansion has been applied for free standing,
thin metal film. We found that the DC electric field allows perfect
transmission when the length of the slit is infinite, regardless of the
other geometrical factors such as slitwidth and thickness. Slitwidth
dependent transmission spectra as a function of frequency shows a cutoff
frequency that decreases almost linearly to the slitwidth, giving that
almost successful shielding is only possible when the slitwidth is smaller
than 1 micron.
© 2016 Optical Society of Korea
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