Semiconductor-coated deep subwavelength spoof surface plasmonic waveguide for THz and MIR applications

Ruoxi Yang; Wangshi Zhao; Richard A. Soref; Zhaolin Lu

doi:10.1117/12.874247

23 February 2011 Semiconductor-coated deep subwavelength spoof surface plasmonic waveguide for THz and MIR applications

Ruoxi Yang, Wangshi Zhao, Richard A. Soref, Zhaolin Lu

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Proceedings Volume 7938, Terahertz Technology and Applications IV; 79380A (2011) https://doi.org/10.1117/12.874247
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

We propose integrated waveguides for terahertz (THz) and mid-infrared (MIR) applications on wafer platform. Based on the prototype of spoof plasmonic waveguides consisting of textured metallic surface, we explore the possibility of coating periodic metallic pattern with silicon (at 0.6 THz) or germanium (at MIR region of 30 THz) to further shrink the relative mode size of propagation spoof plasmonic waves. Numerical modeling via 3D finite-difference time-domain (FDTD) has shown deep sub-wavelength mode confinement in transverse directions to smaller than λ/50 by λ/50, with an estimated propagation loss of less than 0.1 dB for each repetitive unit.

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Ruoxi Yang, Wangshi Zhao, Richard A. Soref, and Zhaolin Lu "Semiconductor-coated deep subwavelength spoof surface plasmonic waveguide for THz and MIR applications", Proc. SPIE 7938, Terahertz Technology and Applications IV, 79380A (23 February 2011); https://doi.org/10.1117/12.874247

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KEYWORDS

Terahertz radiation

Metals

Waveguides

Dispersion

Plasmonic waveguides

Silicon

Wave propagation

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