Abstract
Achieving high-Q resonances in the THz frequency range is significant for applications such as sensors, filters, and emitters. A promising approach for obtaining such resonances is by using metamaterials. However, high-Q resonances in THz metamaterials are usually limited by metallic radiation losses in the meta-atoms. In this Letter, we investigate both experimentally and numerically a complementary metallic disk-hole array (CMA) that uses the coupling between lattice resonances and Fabry–Pérot cavity resonances, and features in-substrate modes with experimentally obtained record breaking Q-factors of up to 750. To the best of our knowledge, this is the highest quality factor measured for free-space-coupled metallic metamaterial structure at THz frequencies.
| Original language | English |
|---|---|
| Pages (from-to) | 620-623 |
| Number of pages | 4 |
| Journal | Optics Letters |
| Volume | 48 |
| Issue number | 3 |
| DOIs | |
| State | Published - 1 Feb 2023 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2023 Optica Publishing Group.
Funding
Samples were fabricated at the center for nanoscience and nanotechnology of the Hebrew University.
| Funders | Funder number |
|---|---|
| Hebrew University of Jerusalem |