Low-loss Waveguides for THz Guidance and Devices

Rahman, B. M., Themistos, C., Tanvir, H. M., Uthman, M., Quadir, A. & Markides, C. (2013). Low-loss Waveguides for THz Guidance and Devices. Proceedings of SPIE, 8624, doi: 10.1117/12.2008201

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Abstract

The terahertz (THz) region occupies a large portion of the electromagnetic spectrum, located between the microwave and optical frequencies and normally is defined as the band ranging from 0.1 to 10 THz. In recent years, this intermediate THz radiation band has attracted considerable interest, because it offers significant scientific and technological potential for applications in many fields, such as sensing [1], imaging [2] and spectroscopy [3]. However, waveguiding in this intermediate spectral region is a major challenge and strong dielectric and conductive losses in the terahertz frequency range have been a major problem for waveguiding. The conventional guiding structures exemplified by microstrips, coplanar striplines and coplanar waveguides [4] are highly lossy and dispersive. However, so far the most promising dielectric waveguides have been the use of photonic crystal fibers at terahertz frequencies [5, 6] and metal coated guides [7] at terahertz frequencies. In this paper, various types of practical dielectric and metal coated waveguides are evaluated and design optimization of Quantum Cascade Lasers, MMI-based power splitters and narrow-band filters are presented, by using full-vectorial finite element method [8]. © (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

Item Type: Article
Additional Information: B. M. A. Rahman ; C. Themistos ; H. Tanvir ; M. Uthman ; A. Quadir ; C. Markides, B. M. A. Rahman ; C. Themistos ; H. Tanvir ; M. Uthman ; A. Quadir ; C. Markides, Proceedings of SPIE, Vol 8624, 2013, Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. http://dx.doi.org/10.1117/12.2008201
Uncontrolled Keywords: THz waveguides; THz devices, finite element method
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: School of Engineering & Mathematical Sciences > Engineering
URI: http://openaccess.city.ac.uk/id/eprint/12229

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