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Optics Letters

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  • Vol. 37, Iss. 13 — Jul. 1, 2012
  • pp: 2742–2744

Simple fabrication of an antireflective hemispherical surface structure using a self-assembly method for the terahertz frequency range

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


Optics Letters, Vol. 37, Issue 13, pp. 2742-2744 (2012)
http://dx.doi.org/10.1364/OL.37.002742


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Abstract

A hemispherical surface structure was fabricated on a sapphire substrate by utilizing a self-assembly and spin-coating process for a terahertz (THz) antireflection coating. The self-assembled glass spheres and spin-coated material led to a gradual change in the effective refractive index. The aspect ratio of the hemispherical surface structure was controlled easily by adjusting the thickness of the B-staged bisbenzocyclobutene used as a coating. The reflectance of the fabricated hemispherical surface structure, having a period of 140 μm, exhibited low reflectance and low Fabry–Perot resonance in a THz spectral range from 0.1 to 1.9 THz.

© 2012 Optical Society of America

OCIS Codes
(220.4000) Optical design and fabrication : Microstructure fabrication
(300.6495) Spectroscopy : Spectroscopy, teraherz
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Materials

History
Original Manuscript: January 30, 2012
Revised Manuscript: May 16, 2012
Manuscript Accepted: May 21, 2012
Published: June 28, 2012

Citation
Dae-Seon Kim, Dong-Ju Kim, Dong-Hyun Kim, Sehyun Hwang, and Jae-Hyung Jang, "Simple fabrication of an antireflective hemispherical surface structure using a self-assembly method for the terahertz frequency range," Opt. Lett. 37, 2742-2744 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-13-2742

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