Tag: infrared

Niclas MuellerFritz-Haber-Institute of the Max-Planck-Society – Berlin, Germany_______________________________________ Nonlinear optical spectroscopy and microscopy are powerful tools to characterize interfaces and lower-dimensional materials [1,2]. Here we introduce infrared + visible sumfrequency generation (SFG) imaging of hexagonal boron nitride (hBN) monolayers within a wide-field optical microscope. The technique enables us to image the topography and crystal orientation…