Fig. 4: DF and TIR microscopy using on-chip VCSELs with integrated metagratings.
From: High-angle deflection of metagrating-integrated laser emission for high-contrast microscopy
a A schematic of the on-chip microscopy setup, where Au nanoparticles on a fused silica substrate are illuminated by TIR laser light; b Stitched optical micrographs of light scattered by Au nanoparticles fabricated on a glass/air interface, illuminated by TIR VCSEL light; c A schematic of the on-chip microscopy setup, where Au nanoparticles in a colloid solution are illuminated by DF-TIR laser light; d An optical micrograph of light scattered by colloidal Au nanorods (180 × 88 nm2) illuminated by DF-TIR illumination
