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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 15 — Jul. 16, 2012
  • pp: 16815–16822

Surface relief structures for a flexible broadband terahertz absorber

Dong-Hyun Kim, Dae-Seon Kim, Sehyun Hwang, and Jae-Hyung Jang  »View Author Affiliations

Optics Express, Vol. 20, Issue 15, pp. 16815-16822 (2012)

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Terahertz (THz) absorbers with surface relief structures (SRSs) were designed and fabricated on a flexible polydimethylsiloxane(PDMS) substrate by using a stamping method. The silicon mold used for the stamping process was prepared by using a crystallographic wet etching method with 45% KOH solution at 80°C. The flexible THz absorber, consisting of micropyramids with a base width of 240 μm, demonstrated nearly perfect absorbance higher than 99% owing to the dramatically reduced surface reflectance of the SRS. The reflectance of the PDMS with the SRS was less than 1%, which is only 1/100th of that measured from a bare PDMS at frequency higher than 1 THz.

© 2012 OSA

OCIS Codes
(310.1210) Thin films : Antireflection coatings

ToC Category:
Thin Films

Original Manuscript: June 1, 2012
Revised Manuscript: July 1, 2012
Manuscript Accepted: July 2, 2012
Published: July 10, 2012

Dong-Hyun Kim, Dae-Seon Kim, Sehyun Hwang, and Jae-Hyung Jang, "Surface relief structures for a flexible broadband terahertz absorber," Opt. Express 20, 16815-16822 (2012)

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