[20p-H135-1~16] 3.9 Terahertz technologies

▲ [20p-H135-16] THz quantum cascade lasers toward high output power operation

〇TSUNGTSE LIN¹, WATARU TERASHIMA¹, HIDEKI HIRAYAMA¹ (1.RIKEN)

Keywords:quantum cascade lasers,terahertz

THz quantum cascade lasers (QCLs) are a promising high output-power semiconductor THz sources with narrow bandwidth. Based on the long time bottom neck of limited operation temperature below 200 K, it is still quite limited the compact size THz applications cause by the large cooling system. On the other hand, devices output is also one of the critical parameters to realize the applications. Here we demonstrate the recent our fabricated high temperature operation QCLs devices combined with the 77 K liquid nitrogen Dewar condenser as a real useful relative compact size THz source unit. Then improve the output power from the active region, waveguide, and device fabrication designs from recent toward high operation temperature THz QCLs in order to suit with and exhibit the best performance of the compact 77 K Dewar system.