研究目的
Investigating the control of THz pulse propagation direction in semiconductor waveguides using tilted-pulse-front techniques for potential applications in THz amplification and semiconductor laser development.
研究成果
The study successfully demonstrates the control of THz pulse emission direction using tilted-pulse-front techniques, achieving phase synchronization between the optical and THz beams. This method shows promise for investigating THz gain in semiconductor superlattices and developing tunable room temperature semiconductor lasers. Future work will focus on optimizing the waveguide and excitation setup to avoid bandwidth loss and explore applications in measuring weak THz gain in thin superlattices and other 2D materials.
研究不足
The bandwidth of the THz pulses is limited to less than 1 THz due to refractive index changes influenced by the metal of the waveguide and the semiconductor-air interface. The experimental setup's complexity and the limited tuning range of incidence angles on the grating also constrain the steering rate of the THz radiation.
