Fig. 5: mmWave emission engineering from QCL3.
From: Millimeter wave photonics with terahertz semiconductor lasers
a Full spectrum showing THz emission split in two spectral bands around 2.45 THz using an integrated GTI. Nonlinear mmWave generation centred at 244 GHz is observed. b Enhanced view of THz emission showing the two spectral bands with mode separation of 14 GHz. c Enhanced view of nonlinear mmWave emission showing emission centred at 244 GHz. The QCL is driven in pulsed mode (10% duty cycle) and at a fixed heat sink temperature of 10 K.
