Share Email Print
cover

Proceedings Paper

Focalizing of terahertz waves with a Fresnel lens
Author(s): Yulei Shi; Wei Liu; Qing-li Zhou; Cunlin Zhang
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The spatiotemporal and spectral characteristics of ultrawide-band terahertz pulses after passing through a Fresnel lens are studied by using scalar diffraction theory. The simulation shows that the transmitted terahertz waveforms compress with increasing propagation distance, and the multi-frequency focusing phenomenon at different focal points is observed. Additionally, the distribution of terahertz fields in planes perpendicular to the axis is also discussed, and it is found that the diffraction not only induces focusing on axis but also inhibit focusing at off-axis positions. Therefore, the Fresnel lens may be a useful alternative approach to be a terahertz filter. Moreover, the terahertz pulses travelling as basic mode of Gaussian beam is discussed in detail.

Paper Details

Date Published: 12 August 2011
PDF: 15 pages
Proc. SPIE 8195, International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications, 819504 (12 August 2011); doi: 10.1117/12.899428
Show Author Affiliations
Yulei Shi, Capital Normal Univ. (China)
Wei Liu, Capital Normal Univ. (China)
Qing-li Zhou, Capital Normal Univ. (China)
Cunlin Zhang, Capital Normal Univ. (China)


Published in SPIE Proceedings Vol. 8195:
International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications

© SPIE. Terms of Use
Back to Top