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利用传输矩阵和散射矩阵方法,具体计算了单通道和双通道结构完美相干吸收效应的产生条件,并分析了其之间的相关性.结果表明,单、双通道结构各自都有大量可选条件能促使完美相干吸收效应的发生,且在入射波长及其相应介质折射率等参数不变的情况下,双通道完美相干吸收效应产生所对应的介质长度与单通道完美相干吸收效应产生所对应的介质长度具有二倍关系.如波长为756 nm的光入射Si介质,完美相干吸收可以在介质长度分别为3.701和7.402μm的单通道结构和双通道结构中发生.该研究对促进完美相干吸收效应在光调制、光开关、光学探测等方面应用以及光学通信和计算领域的硅基集成光子器件设计都具有积极意义.
Using the transfer matrix and the scattering matrix method, the conditions for the perfect coherent absorption effect of single-channel and dual-channel structures are calculated and the correlation between them is analyzed. The results show that there are a large number of optional conditions Can promote the perfect coherent absorption effect, and the incident wavelength and its corresponding medium refractive index and other parameters unchanged circumstances, the perfect coherent absorption of dual-channel absorption effect corresponding to the medium length and single channel perfect coherent absorption effect of the corresponding Such as wavelength of 756 nm incident on the Si medium, the perfect coherent absorption in the medium length of 3.701 and 7.402μm, respectively, the single-channel structure and dual-channel structure occurred in this study to promote the perfect coherent absorption effect Applications in optical modulation, optical switches, optical probing and the design of silicon-based integrated photonic devices in the field of optical communications and computing are of positive interest.