# Porous metamaterials for deep sub-wavelength ultrasonic imaging

> Research article (Applied Physics Letters, 2018) · cited 38× · AI/ML

**Wikidata**: [openalex:W2891252008](https://www.wikidata.org/wiki/openalex:W2891252008)  
**Source**: https://4ort.xyz/entity/porous-metamaterials-for-deep-sub-wavelength-ultrasonic-imaging