Format

Send to

Choose Destination
See comment in PubMed Commons below
Opt Lett. 2009 Apr 1;34(7):1030-2.

Generation of Bessel beams using a terahertz quantum cascade laser.

Author information

1
School of Electronic and Electrical Engineering, University of Leeds, Leeds, UK.

Abstract

We report the generation of Bessel beams using polytetrafluoroethene conical lenses and a quantum cascade laser emitting at 2.8 THz. The formation of a central beam spot that retains its size over distances exceeding the characteristic Rayleigh range is demonstrated, and the power transport properties of these beams are compared with those obtained using parabolic reflectors. These lenses could provide an attractive alternative to parabolic reflectors for terahertz imaging applications where a large depth of focus and/or efficient and controllable coupling of radiation onto a small target are desirable.

PMID:
19340209
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Optical Society of America
    Loading ...
    Support Center