For example, if you use green light with a wavelength of 500 nanometers, an optical microscope can, at best, distinguish objects at a distance of 250 nanometers. This has to do with the wave nature of light and the associated laws of physics, which were formulated by the German physicist Ernst Abbe back in 1873.Īccording to these laws, a microscope’s maximum resolution is equal to half the wavelength of the light used. However, conventional optical microscopes cannot be used to image individual molecules and atoms, which measure just fractions of a nanometer across. Microscopes allow us to see structures that are otherwise invisible to the human eye. Together with colleagues from the University of Bochum, scientists from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute reported the findings in the journal Nature Photonics. In particular, the new method allows the imaging of quantum dots in a semiconductor chip. Physicists have developed a technique based on optical microscopy that can be used to create images of atoms on the nanoscale.
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