摘要
模拟并制作了基于光子带隙结构的一维太赫兹光滤波器.通过人工叠加方式制作一维周期性结构,以聚乙烯或聚四氟乙烯作为高折射率材料,用钻有圆孔的合金片作为空气层,利用太赫兹时域光谱技术测量样品在0.1～0.9 THz波段的透射谱.根据理论模拟结果,利用聚乙烯设计制作中心波长为0.3 THz的带阻滤波器,结构周期为400μm,占空比为0.5.测量的3 dB带宽为0.08 THz,与模拟结果0.07 THz基本吻合.
The theoretical and experimental results of one dimensional （ 1 D） terahertz （THz） filter were introduced based on photonic band gap structures. The periodic structures were fabricated by artificial stacking method. The polytetrafluoroethylene or polyethylene slices were used as high refractive index layers, and the alloy slices with hole in center were used as air layers. The transmission spectra were measured by a terahertz tirae domain spectroscopy. The measured frequency range was 0. 1-0.9 THz. The measured results consisted well with the simulated data. Based on theoretical and experimental data, a band-stop filter with central frequency at 0.3 THz was designed and fabricated by polyethylene （PE）. The duty cycle was 0.5, and the period was 400 μm. The 3 dB bandwidth was 0. 08 THz, which was close to the simulated result （0.07 THz）.
出处
《深圳大学学报（理工版）》
EI
CAS
北大核心
2012年第4期295-299,共5页
Journal of Shenzhen University(Science and Engineering)
基金
Fok Ying Tung Educational Foundation(114009)
Shenzhen Basic Research Program(JC201005280565A)~~
关键词
太赫兹波
光子带隙
光子晶体
带阻滤波器
透射谱
聚乙烯
高折射率材料
时域光谱
terahertz waves
photonic band gap
photonic crystals
bandstop filters
transmission spectra
polyethylene
high refractive index material
time： domain spectroscopy
