research
The Film Says Yes From One Side and No From the Other
Cornell researchers combined strong linear and chiral optical effects in simple semiconductor-cluster films to make light absorption depend on direction.
Summary
Cornell researchers combined strong linear and chiral optical effects in simple semiconductor-cluster films to make light absorption depend on direction.
Films assembled from cadmium-based magic-size clusters showed nonreciprocal absorption and emission of linearly polarized light without an external magnetic field or elaborate metamaterial. The July 27 Nature Materials study traces the response to comparable linear and chiral dichroism and demonstrates a patterned film that presents different information from opposite sides. The work opens a design route for photonics and optical encryption, but it is a materials demonstration rather than a finished isolator; the fiber image is illustrative.
Why it matters
Cornell researchers combined strong linear and chiral optical effects in simple semiconductor-cluster films to make light absorption depend on direction.
Limits and context
No additional limitation was separately recorded.
Key claims
Cornell researchers combined strong linear and chiral optical effects in simple semiconductor-cluster films to make light absorption depend on direction.
Evidence: source-2026-07-28-003
Sources
- Cornell Chronicle: Direction-dependent light in semiconductor cluster filmsCornell Chronicle · secondary reporting
Corrections
No corrections have been recorded for this story.