Title:
Broadband metal-dielectric near-field antenna
Author(s):
Klein, N.; Lahl, P.; Poppe, U.; Kadlec, F.; Kuzel, P.
Source:
published in Journal of Applied Physics
Vol./Issue/Date:
98 (2005), 14910
Year:
2005
Page(s):
Keywords:
Terahertz, spectroscopy, near-field imaging, pulsed broadband electromagnetic radiations, submillimetre wave antennas; submillimetre wave imaging; submillimetre wave spectroscopy; microwave photonics; dielectric materials
Abstract:
We present an antenna-based approach to near-field imaging and spectroscopy, which can be used for both continuous-wave and pulsed broadband electromagnetic radiations from microwave to terahertz frequencies. Our near-field antenna consists of a rectangular-shaped block of low-loss dielectric material sharpened to a pyramidal tip which is partially metallized and terminated by a micron-sized plane facet. At this facet the entire energy of the incident wave is concentrated as a very high but strongly localized electric field, which can be used as a sensitive near-field microprobe for electromagnetic radiation. Currently, experiments in reflection geometry with pulsed terahertz radiation and continuous-wave radiation near 80 GHz reveal a frequency-independent spatial resolution of about 20 µm corresponding to /200 at 80 GHz, which is only limited by the size of the facet terminating the tip.
Document:
Reference Id:
130
Back to References
Please note that this is a collection of external publications.
CST respects the copyrights of the respective owners and as such can not distribute said publications.
Details of copyright ownership is provided to the best of our knowledge. Please contact the given references for further information.