Masked by rotational anisotropies, xthe nonlinear chiroptical response of a metamaterial is initially completely inaccessible. Upon rotating the sample the chiral information emerges. These results highlight the need for a general method to extract the true chiral contributions to the nonlinear optical signal, which would be hugely valuable in the present context of increasingly complex chiral meta/nanomaterials.
Hooper, D. C., Mark, A. G., Kuppe, C., Collins, J. T., Fischer, P., & Valev, V. K. (2017). Strong rotational anisotropies affect nonlinear chiral metamaterials. Advanced Materials, 29(13), 1-7. . https://doi.org/10.1002/adma.201605110