AI Article Synopsis
- Germanium-on-silicon (GOS) is a top choice for creating long-wave infrared photonic integrated circuits (LWIR PICs) due to its compatibility with CMOS technology and lack of oxides.
- The study highlights the performance of germanium-on-silicon waveguides, showcasing high ring resonance Q-factors (ranging between 2×10 and 1×10) and impressive thermo-optic tunability throughout the long-wave infrared spectrum.
- Significant findings include low propagation loss (down to 6 dB/cm) and the ability to measure ring resonators in the infrared range, emphasizing GOS's potential for advanced photonic integration and waveguide applications at wavelengths from 7 to over 11 microns.
Article Abstract
Germanium-on-silicon (GOS) represents the leading platform for foundry-based long-wave infrared photonic integrated circuits (LWIR PICs), due to its CMOS compatibility and absence of oxides. We describe ring resonance (Q-factors between 2×10 and 1×10) and thermo-optic tunability in germanium-on-silicon waveguides throughout the long-wave-infrared. The ring resonances are characterized by Q-factors and couplings that agree with measurements of propagation loss (as low as 6 dB/cm) and simulations and are enabled by broadband edge coupling (12dB/facet over a 3 dB bandwidth of over 4 microns). We demonstrate the furthest into the infrared that ring resonators have been measured and show the potential of this platform for photonic integration and waveguide spectroscopy at wavelengths from 7 microns to beyond 11 microns.
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| http://dx.doi.org/10.1364/OE.420687 | DOI Listing |
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