Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates |
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| Authors: | DJ Park JT Hong JK Park SB Choi BH Son F Rotermund S Lee KJ Ahn DS Kim YH Ahn |
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| Institution: | 1. Division of Energy Systems Research, Ajou University, Suwon 443-749, Republic of Korea;2. Carl-von-Ossietzky Universität, D-26129 Oldenbrug, Germany;3. Department of Physics, University of Incheon, Incheon 406-840, Republic of Korea;4. Center for Subwavelength Optics and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Republic of Korea |
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| Abstract: | We report on terahertz electromagnetic field transmission through metallic slot antennas supported on various dielectric substrates. The substrate effect strongly modifies the transmission resonance compared to the free-standing case, while the resonance can be determined systematically by introducing an effective refractive index. The relative contribution of the substrate index to the effective index has been measured for various substrates, and shows a good agreement with theoretical calculations based on a coupled mode method. In addition, the slot antenna arrays embedded in a flexible substrate show a transmission resonance governed by a substrate refractive index. |
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