2:00 PM - 2:30 PM [E-5-01 (Invited)] Recent advances in terahertz quantum cascade lasers based on difference-frequency generation 〇Kazuue Fujita1, Shohei Hayashi1, Atsushi Nakanishi1 (1.Hamamatsu Photonics) https://doi.org/10.7567/SSDM.2021.E-5-01