Figure 8
From: Vector measurement and performance tuning of a terahertz bottle beam
Influence of the focal length of the silicon lens to the THz bottle beam. (a) Presents the Ex amplitude and wrapped phase cross-sections with α = 20° and f = 8 mm on the x-z plane. (b) Shows the longitudinal Ex amplitude and wrapped phase patterns with α = 20° and f = 11 mm. (c,e) Give the amplitude curves with f = 8 mm and 11 mm along the lines of z = 0 mm and x = 0 mm. (d) Shows the transverse phase curves with f = 8 mm and 11 mm along the lines of z = 0 mm. (f) Plot the longitudinal phase curves with f = 8 mm and 11 mm on the corresponding amplitude maximal positions.
