Researchers have identified that structured light and nanomaterials can be used to alter properties of light at nanoscale, according to a study conducted on April 20, 2018.
This study was conducted by researchers at Tampere University of Technology (TUT) (Finland) and University of Tübingen (Germany). They have shown that carefully structured light and metal nanostructures can be combined to change the properties of the generated light at the nanometer scale. Moreover, the efficiency of nonlinear optical fields generated from the oligomers will depend on the arrangement of constituents of the oligomer in space and how these constituents are illuminated by structured light.
The basis for important functionalities in photonics such as frequency conversion of light and generation of ultrashort light pulses is provided by nonlinear optical processes. Synthesis of novel nanomaterials with tailorable optical properties will fuel further advancements in this field. To demonstrate such capabilities, researchers have designed and fabricated assemblies of gold nanorods with well-defined dimensions and orientations. The nonlinear response of such plasmonic oligomers was analyzed by the researchers with the help of a novel optical microscopy technique, which is equipped with polarization-structured beams.
Professor Martti Kauranen, head of the Nonlinear Optics Group and Laboratory of Photonics said, “Beyond the nonlinear effects studied in the present work, our results show in general how important it is to tailor the incident optical beam in order to couple light efficiently into complex nanostructures.” This study will be beneficial in the design and implementation of new kinds of optical components and characterization techniques, which make use of unconventional optical fields.