ArticleNature communications2022
High-quality microresonators in the longwave infrared based on native germanium.
Article in Nature communications, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- AlGaAs-on-insulator microresonators satisfying broadband phase matching for longwave infrared spectral upconversion.Nanoscale advances · 2026Article
- Advanced Mid-Infrared Sensors for Molecular Analysis.Analytical chemistry · 2025Review
- A mid-infrared Brillouin laser using ultra-high-Q on-chip resonators.Nature communications · 2025Article
- Low-loss hybrid germanium-on-zinc selenide waveguides in the longwave infrared.Nanophotonics (Berlin, Germany) · 2024Article
- Active mid-infrared ring resonators.Nature communications · 2024Article
Corrections and comments
- Erratum issued
Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The longwave infrared (LWIR) region of the spectrum spans 8 to 14 μm and enables high-performance sensing and imaging for detection, ranging, and monitoring. Chip-scale LWIR photonics has enormous potential for real-time environmental monitoring, explosive detection, and biomedicine. However, realizing technologies such as precision sensors and broadband frequency combs requires ultra low-loss and low-dispersion components, which have so far remained elusive in this regime. Here, we use native germanium to demonstrate the first high-quality microresonators in the LWIR. These microresonators are coupled to partially-suspended Ge waveguides on a separate glass chip, allowing for the first unambiguous measurements of isolated linewidths. At 8 μm, we measured losses of 0.5 dB/cm and intrinsic quality (Q) factors of 2.5 × 10
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