Terahertz (THz) technology is experiencing rapid progress thanks to recent advancements in sources and
detectors. Recent developments include a new compact, thermoelectrically cooled surface emitting THz QCLs operating in an HHL housing. These lasers can operate in a laboratory setting without using any cryogenic cooling.
We present a 3.9 THz quantum cascade laser operating in a compact high heat load (HHL) housing. The device features a loop mirror back reflector and a dry-etched surface-emitting antenna that shapes the far-field pattern to optimize coupling to user-defined devices. A peak power of 1.8 mW and average power of 4.5 μW at 185 K are measured experimentally, and the device output is easily detected with
a room-temperature THz camera.
You can read more about our latest results at https://www.degruyterbrill.com/document/doi/10.1515/nanoph-2025-0185/html
