Terahertz brewster lenses

Matthias Wichmann, Benedikt Scherger, Steffen Schumann, Sina Lippert, Maik Scheller, Stefan F. Busch, Christian Jansen, Martin Koch

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

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 fibercoupled THz-TDS system.

Original languageEnglish (US)
Pages (from-to)25151-25160
Number of pages10
JournalOptics Express
Volume19
Issue number25
DOIs
StatePublished - Dec 5 2011

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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