Nanostructures (quantum dots, nanocrystals, nanofibres, nanomembranes, nanotubes, ...) are referred to as objects with dimensions in the range of units to tens of nanometres. They exhibit unique physical and chemical properties that are not observed in the macroworld. Nanotechnology is considered to be one of the main sources of innovation in technology and one of the top priorities in science for the 21st century.
Optical characterization methods are techniques that use optical radiation to obtain information about the material under study. They include, for example, microscopy, ellipsometry, photoluminescence spectroscopy and Raman spectroscopy.
Stability of the light source = key factor
When characterising very small structures, the stability of the light source used is critical. NKT Photonics ' SuperK EXTREME supercontinuum lasers provide a unique Power Lock feature that allows you to compensate for drift and instability in the alignment of mirrors, lenses, etc. It can thus provide laser users with power stability in the range of 0.2 - 0.5%.
The figure below shows the output of the VARIA filter module without and with the Power Lock function. In addition to excellent output stability, the SuperK EXTREME boasts the best directional stability on the market
