講演情報
[16a-WL1_201-4]Surface Relief Formation with Light Possessing Multiple Vortices
〇Junjie Zhao1, Kizaki Kazuro1, Taguchi Atsushi2, Madoka Ono1, Soki Hirayama3, Takashige Omatsu3 (1.Tohoku Univ., 2.Hokkaido Univ., 3.Chiba Univ.)
キーワード：
Optical vortices、Surface relief、OAM and SAM coupling
A topological-charge non-degenerate hybrid vortex mode is formed via the coherent superposition of two LG modes with different OAM indices (l and l’; l ≠ -l’), and it possesses space-invariant beam propagation properties. It has multiple vortices possessing non-zero OAM, associated with multiple singularities and |l – l’| petal-like bright spots.
As an analogous optical counterpart of multiple vortices in condensed matter physics, the multiple vortices of a non-degenerate hybrid vortex mode offer new insights into light–matter interactions. However, previous studies have been performed by using optical vortices with a single-phase singularity, and there are few reports detailing the simultaneous interaction between non-degenerate hybrid vortex modes with multiple vortices and materials.
This work presents the first demonstration of surface relief formation in an azo-polymer using illumination by non-degenerate hybrid vortex modes with |l| - |l’| = 1. The spatially localized vortices of these non-degenerate hybrid vortex modes are directly imprinted as fist-like protrusions. Furthermore, we demonstrate the first fabrication of exotic chiral surface relief structures with an odd (≥3) number of curved arms without the help of temporal rotation.
This demonstration offers new insights into light–matter interactions via SAM-OAM coupling effects and opens the door to a deeper understanding of the formation of vortex lattices and vortex–antivortex pairs in condensed matter physics. It also provides a method for fabricating chiral surface relief structures with an odd number of spiral arms, which may be utilized in advanced optical data storage and chiral metasurface applications.
As an analogous optical counterpart of multiple vortices in condensed matter physics, the multiple vortices of a non-degenerate hybrid vortex mode offer new insights into light–matter interactions. However, previous studies have been performed by using optical vortices with a single-phase singularity, and there are few reports detailing the simultaneous interaction between non-degenerate hybrid vortex modes with multiple vortices and materials.
This work presents the first demonstration of surface relief formation in an azo-polymer using illumination by non-degenerate hybrid vortex modes with |l| - |l’| = 1. The spatially localized vortices of these non-degenerate hybrid vortex modes are directly imprinted as fist-like protrusions. Furthermore, we demonstrate the first fabrication of exotic chiral surface relief structures with an odd (≥3) number of curved arms without the help of temporal rotation.
This demonstration offers new insights into light–matter interactions via SAM-OAM coupling effects and opens the door to a deeper understanding of the formation of vortex lattices and vortex–antivortex pairs in condensed matter physics. It also provides a method for fabricating chiral surface relief structures with an odd number of spiral arms, which may be utilized in advanced optical data storage and chiral metasurface applications.