Search by tag «Optics Letters» 4 results

• Researchers Develop Supersensitive Method to Measure Surface Topography With THz Radiation

  The method allows scientists to get an image close to a holographic one in its properties but with less energy input. In theory, the method could be applied in industrial quality control or acquiring images of concealed objects, for instance, in transillumination of envelopes. 

  30.07.2020

• Scientists Develop New Analysis Method of Non-Linear Optical Properties

  Scientists from ITMO University in collaboration with their colleagues from National Taiwan Normal University have developed a high-sensitivity method of studying the non-linear optical properties of substances. Unlike other research in this area, this project uses a collimated (unfocused) laser beam, which allowed the researchers to decrease the power density applied to a sample, though at the price of loss of useful signal. Using a special procedure for recording holograms and processing images, as well as using a special computational modeling algorithm, they have been able to measure the properties of optically non-linear media despite a weak signal. The project opens up new possibilities for diagnostics of non-linear properties. Results of the research were published in Optics Letters.

  19.09.2018

• Scientists Invent Method of Catching Bacteria with ‘Photonic Hook’

  An international team of physicists has discovered a new type of curved light beams, dubbed a “photonic hook”. Photonic hooks are unique, as their radius of curvature is two times smaller than their wavelength. This is the first time that such a small curvature radius of electromagnetic waves has been recorded. A photonic hook can be used to improve the resolution of optical scanning systems, as well as to control the movement of nanoparticles, individual cells, viruses or bacteria. Results of this research were published in Optics Letters and Scientific Reports.

  16.03.2018

• Researchers Use Glass Microparticles to Enhance Solar Cell Efficiency

  Scientists from ITMO University have developed a new solar cell coating based on amorphous silicon that combines the features of an electrode and those of a light-trapping structure. The coating enabled researchers to cut down on reflected light and avoid the overheating of solar cells, thus increasing their overall efficiency by 20%. Moreover, the suggested method is highly suitable for industrial needs due to its relatively low cost and simplicity. The research was published in Optics Letters.

  16.11.2017