Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Tip-enhanced Raman spectroscopy can provide chemical sensitivity at a single-molecule level. Measurements on individual molecules adsorbed on a thin salt layer unveil that components of the electric field perpendicular to the tip provide sensitivity to the symmetry of the vibrational modes of the molecule.
Non-intrusive integration of metasurfaces with vertical cavity surface-emitting lasers enables fully arbitrary wavefront control for directional laser emission.