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5. Two-Conductor Ports Enabling Broadband Operation of Substrateless Microscale Silicon Waveguides

Author

Headland, Daniel, Gallego, Daniel C., and Carpintero, Guillermo

Abstract

We extend the operation bandwidth of substrateless all-silicon waveguides beyond the single-mode region. This requires a suitably broadband port-access scheme, as well as careful management of undesired higher order modes. It is found that a length of two-conductor waveguide serves both purposes. In this way, we experimentally demonstrate broadband power transfer between dielectric waveguides and numerically investigate suppression of higher order modes. This 3-D solid-metal two-conductor waveguide shows promise as a package-external terahertz port, to address the 40% relative-bandwidth bottleneck that is currently imposed by hollow metallic waveguides. This represents a step toward efficient handheld terahertz systems that fully exploit the broad available spectrum.

Published
2024
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8. Contactless Cost-effective Polarizer for mm-Wave Dielectric Rod Waveguide

Author

Kumar, Ashish, Gallego, Daniel C., Headland, Daniel, Ali, Mushin, Xenidis, Nikolaos, Lioubtchenko, Dmitri, Carpintero, Guillermo, Kumar, Ashish, Gallego, Daniel C., Headland, Daniel, Ali, Mushin, Xenidis, Nikolaos, Lioubtchenko, Dmitri, and Carpintero, Guillermo

Abstract

We present a method to control the polarization of guided waves in a mm-wave dielectric rod waveguide. A pair of optical posts is situated on either side of the waveguide, and this markedly raises the cutoff of the undesired mode. The isolation is 20 dB over a frequency span from (55-87) GHz. This can be viewed as a proof-of-concept for reconfigurable, general-purpose polarization control and dispersion engineering in mm-wave and terahertz-range dielectric waveguides., QC 20221205

Published
2022
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