Abstract
A virtual all-optical tunable terahertz Fresnel zone plate is achieved utilizing the localized distribution of the transient electron plasma on a silicon wafer. Its focusing and imaging performance are experimentally demonstrated. Experimental results show that the effect of the virtual zone plate is the same as an actual one. Adjusting the spatial pattern of the electron plasma, the central wavelength and the focal length of the virtual zone plate can be all-optically dynamically steered. The research is a significant step to the development of tunable optical imaging elements.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Tao Liu, Jiubin Tan, Jian Liu, and Hongting Wang
Opt. Lett. 38(15) 2742-2745 (2013)
Binzhi Zhang and Daomu Zhao
Opt. Express 18(12) 12818-12823 (2010)
Hongchang Wang, Sebastien Berujon, Ian Pape, Simon Rutishauser, Christian David, and Kawal Sawhney
Opt. Lett. 38(6) 827-829 (2013)