How is Refractive Index Measured at the Nanoscale?
Measuring the refractive index at the nanoscale involves techniques such as ellipsometry, near-field scanning optical microscopy (NSOM), and spectroscopy. These methods allow researchers to determine the optical properties of nanomaterials with high precision. For example, ellipsometry measures the change in polarization of light reflected from a sample, providing information about its refractive index and thickness.
