Patent ID: 10099921

Abstract:
Provided is the possibility for new application of optical vortices. In order to do so, the method for producing an organic helical structure according to the present invention entails irradiating the surface of macromolecules that exhibit a photoisomerization reaction with an optical vortex, thereby forming a nanoscale helical structure on the surface of the macromolecules. In this case, it is preferable that the macromolecules exhibiting a photoisomerization reaction are azo polymer and/or spiropyran-polymer macromolecules. Moreover, it is preferable that the step for forming a nanoscale helical structure is repeated, and that a plurality of nanoscale helical structures are formed in two dimensions on the surface of the macromolecules. It is also preferable that the optical vortex is circularly polarized light, and that the total angular momentum (J) of the optical vortex is not 0.