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Development of Technology for Generation and Measurement of Topological Light Waves
Topological light waves, such as optical vortices, are expected to be applied to the microfabrication of materials, large-capacity information communication, and super-resolution microscopy thanks to their unique properties. In our laboratory, we are currently developing light sources and measurement techniques for the application of topological light waves.
Research
As shown in Fig. 1, optical vortices have a helical phase distribution and a donut-shaped intensity distribution in the beam cross-section. These properties can be used to realize microscopes demonstrating performance that far exceeds the spatial resolution of conventional optical microscopes and nanometer-order microfabrication. In our laboratory, we are conducting research and development to enable further new applications by combining this kind of light with ultrashort optical pulses, which are extremely short in duration (10-12 to -15 seconds). We have succeeded in generating ultrashort optical vortex pulses that can computer-control the helical phase and has a peak power of several tens of GW. We have also succeeded in developing a completely new method for instantaneous measurement of the helical phase (Fig. 2). We are now applying these originally developed fundamental technologies to material processing and communication technologies.
Keisaku Yamane Associate Professor
