Abstract
Optical vortices have the tremendous potential to increase data capacity by leveraging the extra degree of freedom of orbital angular momentum. On the other hand, anisotropic 2D materials are promising building blocks for future integrated polarization-sensitive photonic and optoelectronic devices. Here, highly anisotropic third-harmonic optical vortex beam generation is demonstrated with fork holograms patterned on ultrathin 2D germanium arsenide flakes. It is shown that the anisotropic nonlinear vortex beam generation can be achieved independent of the fork grating orientation with respect to the crystallographic orientation. Furthermore, 2D fork hologram is designed to generate multiple optical vortices having different topological charges with strong anisotropic responses. These results pave the way toward the advancement of 2D material-based anisotropic nonlinear optical devices for future applications in photonic integrated circuits, optical communication, and optical information processing.
Recommended Citation
J. Deka et al., "Anisotropic Third-Harmonic Vortex Beam Generation With Ultrathin Germanium Arsenide Fork Gratings," Laser and Photonics Reviews, Wiley-VCH Verlag; Wiley, Jan 2025.
The definitive version is available at https://doi.org/10.1002/lpor.202401519
Department(s)
Mechanical and Aerospace Engineering
Publication Status
Full Access
Keywords and Phrases
2D materials; optical anisotropy; third-harmonic generation; vortex beam
International Standard Serial Number (ISSN)
1863-8899; 1863-8880
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Wiley-VCH Verlag; Wiley, All rights reserved.
Publication Date
01 Jan 2025
