Topologically protected optical polarization singularities in four-dimensional space.
Sci Adv
; 9(24): eadh0369, 2023 Jun 16.
Article
em En
| MEDLINE
| ID: mdl-37327327
ABSTRACT
Optical singularities play a major role in modern optics and are frequently deployed in structured light, super-resolution microscopy, and holography. While phase singularities are uniquely defined as locations of undefined phase, polarization singularities studied thus far are either partial, i.e., bright points of well-defined polarization, or are unstable for small field perturbations. We demonstrate a complete, topologically protected polarization singularity; it is located in the four-dimensional space spanned by the three spatial dimensions and the wavelength and is created in the focus of a cascaded metasurface-lens system. The field Jacobian plays a key role in the design of such higher-dimensional singularities, which can be extended to multidimensional wave phenomena, and pave the way for unconventional applications in topological photonics and precision sensing.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Holografia
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Lentes
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article