CAJ | 학술논문

模拟并制作了基于光子带隙结构的一维大赫兹光滤波器.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0.1～0.9THz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0.3THz的带阻滤波器,结构周期为400μm,占空比为0.5.测量的3dB带宽为0.08THz,与模拟结果0.07THz基本吻合.
모의병제작료기우광자대극결구적일유대혁자광려파기.통과인공첩가방식제작일유주기성결구,이취을희혹취사불을희작위고절사솔재료,용찬유원공적합금편작위공기층,이용태혁자시역광보기술측량양품재0.1～0.9THz파단적투사보.근거이론모의결과,이용취을희설계제작중심파장위0.3THz적대조려파기,결구주기위400μm,점공비위0.5.측량적3dB대관위0.08THz,여모의결과0.07THz기본문합.
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 time 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).