Abstract
We report a broadband metalens that can realize wavefront modulation with high energy efficiency. Based on the impedance-matched gradient material, we theoretically and experimentally study a gradient index helical-structured metamaterial that can modulate sound wavefront with near perfect transmission over a broad bandwidth. A thin flat metalens is constructed to demonstrate sound focusing with the extraordinary transmission for more than 1/3 octave band. It is anticipated that this engineered material may be used in ultrasonography, ultrasound surgery, and DNA fragmentation.
| Original language | English |
|---|---|
| Pages (from-to) | 272-273 |
| Number of pages | 2 |
| Journal | International Conference on Metamaterials, Photonic Crystals and Plasmonics |
| Publication status | Published - 2019 |
| Event | 10th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2019 - Lisbon, Portugal Duration: 23 Jul 2019 → 26 Jul 2019 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
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