Finite size effect of transmission property for metal hole arrays in subterahertz region

Miyamaru, Fumiaki; Hangyo, Masanori
April 2004
Applied Physics Letters;4/12/2004, Vol. 84 Issue 15, p2742
Academic Journal
The mechanism of the high band-pass transmission property of metal hole arrays (MHA), which is metal slabs perforated periodically with circular holes, in the subterahertz (sub-THz) wave region has been investigated. We measured the transmission spectra varying the number of holes using a THz time domain spectroscopy and observed that the peak transmittance normalized by the porosity of holes increases with increasing the number of holes. This finite size effect of the transmission characteristics of the MHA is attributed to the increase of the coupling efficiency between the incident THz wave and the surface mode excited on the MHA surface with increasing the number of holes. © 2004 American Institute of Physics.


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