研究目的
Investigating the generation of THz waves using surface phonon polariton and difference frequency generation in GaP photonic waveguides to find more efficient configurations for THz generation.
研究成果
Propagation along a [100] crystalline axis is more efficient for THz generation in GaP waveguides than the usual [110] configuration, due to better coupling with the longitudinal component of THz SPhP. Optimal THz generation requires a tradeoff between coupling coefficient and THz losses.
研究不足
The study is theoretical and numerical, with preliminary results showing a need for optimization in stripe geometry to balance between coupling coefficient and THz losses. The phase mismatch is large, indicating areas for further improvement.
1：Experimental Design and Method Selection:
The study focuses on comparing the efficiency of THz generation in GaP waveguides with propagation directions aligned with [110] and [100] crystal axes using finite element method simulations.
2：Sample Selection and Data Sources:
GaP stripes surrounded by a dielectric material are modeled, with data from previous studies used for GaP properties.
3：List of Experimental Equipment and Materials:
Simulation software for finite element method analysis.
4：Experimental Procedures and Operational Workflow:
Mode profiles for SPhP at 11 THz are obtained, and the coupling coefficient is calculated for different configurations.
5：Data Analysis Methods:
The efficiency of THz generation is analyzed based on the coupling coefficient and THz losses.
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