Abstract-Generation of terahertz vector beams with a concentric ring metal grating and photo-generated carriers

Generation of terahertz vector beams with a concentric ring metal grating and photo-generated carriers Zhenwei Xie, Jingwen He, Xinke Wang, Shengfei Feng, and Yan Zhang  »View Author Affiliations

Optics Letters, Vol. 40, Issue 3, pp. 359-362 (2015)
http://dx.doi.org/10.1364/OL.40.000359

http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-40-3-359

View Full Text Article

Enhanced HTML    Acrobat PDF (446 KB)

A scheme for vector terahertz (THz) beam generation is proposed. A subwavelength metal grating is utilized to adjust the polarization of the THz radiation. The amplitude and phase distributions of the THz beam are dynamically regulated by a THz computer-generated hologram (CGH) pattern of the photo-generated carriers. A radially polarized THz beam and a vector THz vortex beam with a topological charge of 1 are generated to demonstrate the validity and the effectiveness of the proposed scheme. Experimental results correspond to the theoretical simulations well. Moreover, the proposed method is applicative for a broadband THz radiation. These results could be applied in the THz sensing, THz imaging, and THz communication in the future.

© 2015 Optical Society of America