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학술지 Thin Layer Terahertz Sensing Using Two-Channel Parallel-Plate Waveguides
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저자
박현상, Jingshu Zha, 이의수, 전태인
발행일
201406
출처
Optics Express, v.22 no.14, pp.16738-16744
ISSN
1094-4087
출판사
Optical Society of America(OSA)
DOI
https://dx.doi.org/10.1364/OE.22.016738
초록
We report on the highly sensitive terahertz measurement of a thin, dielectric layer using two channels formed by inserting a single slit sheet in the parallel-plate waveguides (PPWGs). When a thin layer is applied to coat the upper surface of the channel, the single resonance frequency caused by the two-channel PPWGs is shifted as a result of the layer's properties, including length, thickness, and refractive index. The measured frequency tuning sensitivities (FTS) throughout the 20-mm layer length are 2.41 and -1.95 GHz/mm at the open upper and lower channels, respectively. The experimental results agree with those of theoretical simulations performed using the finite-difference time-domain (FDTD) method. © 2014 Optical Society of America.
KSP 제안 키워드
5 GHz, Finite-difference time-domain (fdtd) method, Frequency tuning, Highly sensitive, Measured frequency, Parallel-plate, Resonance frequency, Single slit, dielectric layer, refractive index, terahertz sensing