Subwavelength manipulation of light waves with high precision can enable new and exciting applications in spectroscopy, sensing, and medical imaging. Here, we report a unique “rainbow” trapping metasurface for on-chip spectrometers and sensors. Combined with super-resolution image processing, the low-setting 4× optical microscope system resolves a displacement of the resonant position within 35 nm on the plasmonic rainbow trapping metasurface with a tiny area as small as 0.002 mm2.

Imaging through scattering medium is challenging but important for different applications. Here, we report a new strategy to see through random diffusers directly using self-imaging of speckles.

Nanostructured surfaces enable lab-on-a-chip lung cancer diagnosis.