Cai's Research Featured on NSF Homepage
Wenshan Cai and his group's research on chiral metamaterials is featured on the NSF home page. The research has demonstrated an optical metamaterial whose chiroptical properties in the nonlinear regime produce a significant spectral shift with power levels in the milliwatt range.
The researchers recently demonstrated properties of their chiral metamaterial, in which they spectrally modified two absorptive resonances by incrementally exposing the material to power intensities beyond its linear optical regime. With a 15 milliwatt change in excitation power, they measured a 10-nanometer spectral shift in the material’s transmission resonances and a 14-degree polarization rotation.