Tunable dual-band polarization filter in infrared range realized by nested asymmetrical cross-shaped resonator arrays
Tunable dual-band polarization filter in infrared range realized by nested asymmetrical cross-shaped resonator arrays
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DOI：
10.1007/s11082-016-0402-8
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发表时间：
2016-01
影响因子：
3
通讯作者：
B. Ni;X. Chen;B. Chen;D. B. Zhang;X. Wang;H. Liu;G. Hua;H. Zhou
中科院分区：
文献类型：
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作者：
B. Ni;X. Chen;B. Chen;D. B. Zhang;X. Wang;H. Liu;G. Hua;H. Zhou
本文提出并研究了一种红外范围内的可调谐双波段偏振滤光片。采用具有完美吸收性能的金属-电介质-金属夹层结构来实现滤波器。计算结果表明，当入射光具有平行或垂直于x轴的不同偏振时，反射光谱的不同双波段波长被滤除。此外，我们还发现，通过调整相应矩形条的长度，可以独立、自由地调谐滤光波长（谐振波长）。此外，发现滤光片波长处的所有强度都接近于零，这意味着滤光片表现出良好的滤光性能。
A tunable dual-band polarization filter in infrared range has been proposed and investigated in this paper. The metal-dielectric-metal sandwich structure which possesses perfect absorption property is used to realize the filter. The calculated results show that different dual-band wavelengths of the reflection spectrum are filtered while the incident light has different polarization which is parallel or vertical to thexaxis. Moreover, it is found that the filtered wavelengths (resonant wavelengths) can be tuned independently and freely by adjusting the length of the corresponding rectangular strips. In addition, it is found that all of the intensities at the filter wavelengths are closed to zero, which implies the filter exhibits good filtering performance.