Ultrafast and low-power terahertz wave modulator based on organic photonic crystal |
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| Authors: | Jiu-sheng Li Said Zouhdi |
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| Institution: | 1. Laboratoire de Génie Electrique de Paris LGEP-Supélec, Plateau de Moulon, 91192 Gif-Sur-Yvette Cedex, France;2. Centre for THz Research, China Jiliang University, Hangzhou 310018, China;1. Photonics Research Lab. (P.R.L.), Department of Electrical Engineering, Amirkabir University of Technology, Hafez Avenue, Tehran, Iran;2. Faculty of Electrical Engineering, Semnan University, Semnan, Iran;1. ECN Solar Energy, P.O. Box 1, 1755 ZG Petten, The Netherlands;2. University of Vienna, Faculty of Physics and Center for Computational Materials Science, Sensengasse 8/12, A-1090 Vienna, Austria;3. University of Sheffield, Western Bank, Sheffield S10 2TN, United Kingdom;4. SINTEF, Materials and Chemistry, Box 4760 Sluppen, NO-7465 Trondheim, Norway;1. Department of Orthopedic Surgery, China Medical University Hospital, No. 2, Yuh-Der Rd, Taichung 404, Taiwan;2. Department of Orthopaedics, School of Medicine, China Medical University, No. 91, Hsueh-Shih Rd, Taichung 40402, Taiwan;3. Department of Radiology, China Medical University Hospital, No. 2, Yuh-Der Rd, Taichung 404, Taiwan;1. Institute of Optical Information, Beijing Jiaotong Univerisity, Beijing 100044, China;2. Key Laboratory of Luminescence and Optical Information Technology (Ministry of Education), Beijing Jiaotong University, Beijing 100044, China;1. Research Group of Food Safety, Korea Food Research Institute, 245, Nongsaengmyeong-ro, Iseo-myeon, Wanju-gun, Jeollabuk-do 55365, Republic of Korea;2. Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea |
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| Abstract: | We theoretically investigate the modulation efficiency, response time, and pump power of a terahertz-beam intensity modulator by using an organic photonic crystal slab structure with high quality factor “defect” cavity. The basic operation of an ultrafast low-power terahertz wave modulator actuated by the dynamical shifts of the defect mode induced by pump intensity is discussed in detail. The finite-difference time-domain method is used to verify and analyze the characteristics of the terahertz wave modulator. The device exhibited extinction ratio of 47.15 dB and insertion loss of 3.2 dB at frequency of 1.062 THz with ultrafast response times on the order of several picoseconds. |
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