研究目的
To calculate analytically the optical external e±ciency of the out-going terahertz wave in terahertz sources based on ?erenkov di?erence frequency generation in a dual-wavelength mid-infrared quantum cascade laser.
研究成果
The study demonstrates that the implementation of the ?erenkov emission scheme in terahertz di?erence frequency generation quantum cascade lasers significantly improves the optical external e±ciency. The optimal performance is achieved for short cavity lengths and low terahertz losses in the substrate, with the maximum optical external e±ciency reaching close to 19% under ideal conditions.
研究不足
The performance of the THz sources is limited by the mid-infrared transmission losses and the THz losses in the substrate. The maximum optical external e±ciency of 19% is only attainable if the laser exhibits negligible mid-infrared transmission loss.
