Open AccessVariable-focus terahertz lens
Author(s) -
Benedikt Scherger,
C. Jördens,
Martín Koch
Publication year - 2011
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.004528
Subject(s) - optics , terahertz radiation , refractive index , lens (geology) , materials science , focus (optics) , optical path , optoelectronics , physics
We present a variable focus lens for the THz range. The focal length can be changed by pumping a medical white oil in and out of the lens body. Due to the optical transparency of the liquid and a similar refractive index in the visible frequency range, the THz beam path can be aligned using conventional optical light sources. This type of lens might find applications in terahertz based quality control, stand-off detection and wireless communication systems.