Abstract

Intense THz light is an indispensable tool for nonlinear THz spectroscopy. Presently, the optical rectification in a Mg-doped LiNbO₃ (LN) prism with pulse-front control of the pump pulse is widely used as the most effective method for obtaining intense THz light [1]. This conventional method in which the pump pulse front is tilted by a diffraction grating and imaged onto the LN prism, however, has potential problems in scalability. When we employ large-area excitation with a high power pump light, the THz output energy and spectrum become inhomogeneous in space which limits the efficiency of THz light generation.

© 2016 Japan Society of Applied Physics, Optical Society of America