A breakthrough in nonlinear optical spectroscopy has been achieved by researchers at the University of Tokyo. By using a newly-developed technique, they were able to measure the nonlinear optical response of a material’s surface with extreme precision. This new method, called “surface-specific nonlinear optical spectroscopy in the terahertz range”, could be used to investigate the nonlinear optical properties of a wide range of materials, from semiconductors to organic molecules. This could lead to the discovery of new materials with unique optical properties and lead to advances in fields such as optoelectronics and bioimaging.

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source: Phys.org