Journal of the Korean Physical Society

pISSN 0374-4884 eISSN 1976-8524


Published online July 15, 2009

Copyright © The Korean Physical Society.

Focusing of Terahertz Waves onto Micron-sized Slits Grown on ZnTe and GaP Substrates

M.A. Seo, H.R. Park, D.J. Park, DaiSik Kim, A.J. Adam, P.C. Planken

J. Korean Phys. Soc. 55(1), 267 - 270 (2009)


We report on terahertz focusing through rectangular slit apertures on thinmetal film by using terahertz time domain spectroscopy both in the far- andin the near-field. Our experiments show that far-field perfect transmissionis maintained in the rectangular slit array even as the aperture coveragedecreases. Near-field imaging supports the field enhancement in the singlerectangular aperture indeed occurring at a frequency equal to thefundamental shape resonance frequency.

Keywords: Terahertz, Optical spectroscopy, Plasmonic metamaterials