Author:
Ishihara Kana,Miyamoto Katsuhiko,Omatsu Takashige
Abstract
Laguerre-Gaussian (LG) modes, that is most commonly used optical vortices, possess an orbital angular momentum (OAM) characterized by a topological charge, ℓ, associated with their helical wavefronts, and they have been widely studied in a variety of fields, such as optical manipulations, optical-quantum communication, scanning fluorescence microscopes, and materials processing [1,2]. Surface relief formation of azo-polymers occurs through single-photon or two-photon induced trans-cis isomerization, and it has the potential to develop rewritable optical data storages with high data capacity [3].