Probing the optical properties of single nanostructures is becoming increasingly important in the context of nanoscience. The optical properties of nanostructures frequently occur over a range of wavelengths, and vary depending on medium and size. The spread of optical information over several wavelengths suggests that charac-terisation of nanostructures should be possible. However the optical properties of small particles are intrinsically difficult to investigate due to their small absorption and scattering cross section. Interferometry is a detection strategy that enables the detection of small particles with an excellent signal to noise ratio. In this approach the weak optical signal from the nano-structure is amplified through interference with a much stronger optical reference. Currently most of these interferometric approaches rely on using single, or a few, discrete wavelengths giving only limited optical information on the nano-structure of interest. Instead using a high power supercontinuum light source, could potentially determine the optical features and properties of the nanostructure over the full visible - NIR wavelength range (here: 450nm - 2μm).
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