[18p-WL2_301-1~11] 3.8 Terahertz technologies

3:30 PM - 3:45 PM JST(6:30 AM - 6:45 AM UTC)

[18p-WL2_301-8] Measurement and Visualization of THz-wave Distribution Inside Nonlinear Optical Crystals in Terahertz Parametric Sources

〇Akitoshi Niidome¹, Sota Mine^2,1, Kodo Kawase¹, Kosuke Murate¹ (1.Nagoya Univ., 2.RIKEN)

Keywords:

terahertz,parametric

The injection-seeded terahertz (THz)-wave parametric generator (is-TPG) is a high-intensity, single-frequency THz-wave source with a wide tunability from 0.4 to 5.0 THz. One of the key phenomena that requires experimental observation in is-TPG is the development process of THz-waves. By injecting a probe beam into the is-TPG and detecting the THz-waves inside the crystal via upconversion to near-infrared beam, we were able to experimentally observe the spatial distribution of THz-waves within the crystal—information that had previously been accessible only through simulations—and to visualize how the THz-wave development process changes with variations in the seed beam intensity.