Abstract

Finite element analysis, based on the vector H-field formulation and incorporating the perturbation technique, is used to calculate the complex propagation characteristics of metal-coated dielectric waveguides at terahertz frequencies. The propagation and attenuation characteristics of surface-plasmon modes (SPMs) at the metal/dielectric interfaces are presented. The effects on the modal properties of metal-clad dielectric guides with the cladding thickness and the formation of the supermodes due to coupling between the SPMs in the presence of different surrounding materials are also investigated.

© 2006 IEEE

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Appl. Opt. (3)

Appl. Phys. Lett. (2)

H. Roskas, M. C. Nuus, K. W. Goossen, D. W. Kisker, A. E. White, K. T. Short, D. C. Jacobson, J. M. Poate, "Propagation of picosecond electrical pulses on a silicon-based microstrip line with buried cobalt silicide ground plane," Appl. Phys. Lett. 58, 2604-2606 (1991).

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IEEE Trans. Microw. Theory Tech. (2)

N. Mabaya, P. E. Laggase, P. Vandenbulcke, "Finite element analysis of optical waveguides," IEEE Trans. Microw. Theory Tech. MTT-29, 600-605 (1981).

Y. Lu, F. A. Fernandez, "An efficient finite element method of inhomogeneous anisotropic and lossy dielectric waveguides," IEEE Trans. Microw. Theory Tech. 41, 1215-1223 (1993).

J. Lightw. Technol. (3)

Ó. Esteban, R. Alonso, M. C. Navarrete, A. González-Cano, "Surface plasmon excitation in fiber-optics sensors: A novel theoretical approach," J. Lightw. Technol. 20, 448-453 (2002).

B. M. A. Rahman, J. B. Davies, "Finite-element solution of integrated optical waveguides," J. Lightw. Technol. LT-2, 682-688 (1984).

B. Prade, J. Y. Vinet, "Guided optical waves in fibers with negative dielectric constant," J. Lightw. Technol. 12, 6-12 (1994).

J. Opt. Soc. Amer. A, Opt. Image Sci. (1)

L. Novotny, D. W. Pohl, P. Regli, "Light propagation through nanometer-sized structures: The two-dimensional aperture scanning near-field optical microscope," J. Opt. Soc. Amer. A, Opt. Image Sci. 11, 768-1779 (1994).

J. Opt. Soc. Amer. B, Opt. Phys. (1)

G. Gallot, S. P. Jamison, R. W. McGowan, D. Grischkowsky, "Terahertz waveguides," J. Opt. Soc. Amer. B, Opt. Phys. 17, 851-863 (2000).

Nature (2)

K. Wang, D. M. Mittleman, "Metal wires for terahertz guiding," Nature 432, 376-379 (2004).

R. Kohler, A. Tredicucci, F. Beltram, H. E. Beere, E. H. Linfield, A. G. Davies, D. A. Richie, R. C. Iotti, F. Rossi, "Terahertz semiconductor-heterostructure laser," Nature 417, 156-159 (2002).

Opt. Express (4)

Opt. Lett. (4)

Proc. Inst. Electr. Eng.—Optoelectron. (2)

C. Themistos, A. Hadjicharalambous, B. M. A. Rahman, K. T. V. Grattan, F. A. Fernandez, "Gain/loss characterisation of optical waveguide and semiconductor laser structures," Proc. Inst. Electr. Eng.—Optoelectron. 145, 93-98 (1998).

C. Themistos, B. M. A. Rahman, K. T. V. Grattan, "TM/TE solutions for sub-micrometer lossy metal-clad optical fibres using the finite element method," Proc. Inst. Electr. Eng.—Optoelectron. 145, 171-177 (1998).

Other (1)

T. Hidaka, H. Minumide, H. Ito, S. Maeta, T. Akiyama, "Ferroelectric PVDF cladding THz waveguide," Proc. SPIE (2003) pp. 70-77.

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