| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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A Simple Birefringent Terahertz Waveguide Based on Polymer Elliptical Tube |
| WANG Jing-Li1,2**, YAO Jian-Quan1, CHEN He-Ming2, LI Zhong-Yang1
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1Institute of Laser and Optoelectronics, Key Laboratory of Optoelectronic Information Science and Technology (Ministry of Education), College of Precision Instrument and Optoelectronic Engineering, Tianjin University, Tianjin 300072
2College of Optoelectronic Engineering, Institute of Optical Communications, Nanjing University of Posts and Telecommunications, Nanjing 210003
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| Cite this article: |
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WANG Jing-Li, YAO Jian-Quan, CHEN He-Ming et al 2011 Chin. Phys. Lett. 28 014207 |
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Abstract We propose a simple birefringent terahertz (THz) waveguide which is a polymer elliptical tube with a cross section of elliptical ring structure. It can be achieved by stretching a normal circular-tube in one direction. Simulations based on the full-vector finite element method (FEM) show that this kind of waveguides exhibits high birefringence on a level of 10−2 over a wide THz frequency range. Moreover, as a majority of modal power is trapped in the air core inside the polymer elliptical tube, the THz waveguide guiding loss caused by material absorption can be reduced effectively.
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| Keywords:
42.81.Gs
42.81.Qb
42.25.Bs
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Received: 26 July 2010
Published: 23 December 2010
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| PACS: |
42.81.Gs
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(Birefringence, polarization)
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42.81.Qb
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(Fiber waveguides, couplers, and arrays)
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42.25.Bs
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(Wave propagation, transmission and absorption)
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