| 英文摘要 |
We numerically investigate the coupling efficiency, i.e., the percentage of coupled power, from the light source to theterahertz antiresonant reflecting hollow waveguides. Numerical results show that the coupling efficiency depends strongly on theoperating frequency. To be specific, the coupling efficiency can be well above 90% at most frequencies. However, it dropssignificantly at the resonant frequencies on account of the mode mismatch between the field distribution of input source and themodal pattern of the waveguide mode. The case where a pipe waveguide is connected to another pipe waveguide of different sizeis also examined, which is considered important for system integration. It is found that, coupling efficiency between theconnected pipe waveguides can be high, but the resonant frequencies should be still avoided for efficient operation. |
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