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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 25 — Dec. 5, 2011
  • pp: 25151–25160

Terahertz Brewster lenses

Matthias Wichmann, Benedikt Scherger, Steffen Schumann, Sina Lippert, Maik Scheller, Stefan F. Busch, Christian Jansen, and Martin Koch  »View Author Affiliations

Optics Express, Vol. 19, Issue 25, pp. 25151-25160 (2011)

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Typical lenses suffer from Fresnel reflections at their surfaces, reducing the transmitted power and leading to interference phenomena. While antireflection coatings can efficiently suppress these reflections for a small frequency window, broadband antireflection coatings remain challenging. In this paper, we report on the simulation and experimental investigation of Brewster lenses in the THz-range. These lenses can be operated under the Brewster angle, ensuring reflection-free transmission of p-polarized light in an extremely broad spectral range. Experimental proof of the excellent focusing capabilities of the Brewster lenses is given by frequency and spatially resolved focus plane measurements using a fiber-coupled THz-TDS system.

© 2011 OSA

OCIS Codes
(220.3630) Optical design and fabrication : Lenses
(230.5440) Optical devices : Polarization-selective devices
(300.6495) Spectroscopy : Spectroscopy, teraherz
(110.6795) Imaging systems : Terahertz imaging

ToC Category:
Optical Design and Fabrication

Original Manuscript: September 28, 2011
Revised Manuscript: November 9, 2011
Manuscript Accepted: November 16, 2011
Published: November 23, 2011

Matthias Wichmann, Benedikt Scherger, Steffen Schumann, Sina Lippert, Maik Scheller, Stefan F. Busch, Christian Jansen, and Martin Koch, "Terahertz Brewster lenses," Opt. Express 19, 25151-25160 (2011)

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