# A metamaterial-free omnidirectional invisibility cloak based on thrice transformations inside optic-null medium

> Research article (Optics & Laser Technology, 2022) · cited 22× · AI/ML

**Wikidata**: [openalex:W4304112934](https://www.wikidata.org/wiki/openalex:W4304112934)  
**Source**: https://4ort.xyz/entity/a-metamaterial-free-omnidirectional-invisibility-cloak-based-on-thrice-transformations-inside-optic-null-medium