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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 30, Iss. 21 — Nov. 1, 2005
  • pp: 2945–2947

Resonant terahertz transmission in subwavelength metallic hole arrays of sub-skin-depth thickness

Abul K. Azad and Weili Zhang  »View Author Affiliations

Optics Letters, Vol. 30, Issue 21, pp. 2945-2947 (2005)

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We study surface-plasmon-enhanced terahertz transmission through subwavelength metallic hole arrays of sub-skin-depth thickness. Dynamic evolution of surface-plasmon resonance in terms of array thickness is characterized by use of terahertz time-domain spectroscopy in the frequency range 0.1–4.5 THz. A critical thickness of lead array film is observed, above which surface-plasmon coupling of terahertz pulses begins and is enhanced rapidly as the array thickness is increased toward the skin depth. The experimental results indicate that high-efficiency extraordinary terahertz transmission can be achieved at an array thickness of only one third of skin depth.

© 2005 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(320.7120) Ultrafast optics : Ultrafast phenomena

ToC Category:
Ultrafast Optics

Abul K. Azad and Weili Zhang, "Resonant terahertz transmission in subwavelength metallic hole arrays of sub-skin-depth thickness," Opt. Lett. 30, 2945-2947 (2005)

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