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pro vyhledávání: '"Forbes, Kayn"'
Recent developments in the understanding of optical angular momentum have resulted in many demonstrations of unusual optical phenomena, such as optical beams with orbital angular momentum and transverse spinning light. Here we detail novel contributi
Externí odkaz:
http://arxiv.org/abs/2411.14048
Autor:
Cocotos, Vasilios, Mkhumbuza, Light, Forbes, Kayn A., Koch, Robert de Mello, Dudley, Angela, Nape, Isaac
Laguerre-Gaussian (LG) modes are solutions of the paraxial Helmholtz equation in cylindrical coordinates and are associated with light fields carrying orbital angular momentum (OAM). It is customary to modulate such beams using phase-only vortex prof
Externí odkaz:
http://arxiv.org/abs/2411.07655
Autor:
Cheeseman, Luke, Forbes, Kayn A
The recent discovery that linearly polarized light with a helical wavefront can exhibit vortex dichroism (also referred to as helical dichroism) has opened up new horizons in chiroptical spectroscopy with structured chiral light. Recent experiments h
Externí odkaz:
http://arxiv.org/abs/2408.05994
Autor:
Forbes, Kayn A.
In a recent article Babiker et al. [Optics Communications $\mathbf{554}$, 130185 (2024)] claim that cylindrical vector beams (CVBs), also referred to as higher-order Poincar\'e (HOP) beams, possess optical chirality densities which exhibit `superchir
Externí odkaz:
http://arxiv.org/abs/2403.13495
Autor:
Forbes, Kayn A.
It has recently been established that a linearly-polarized optical vortex possesses spin angular momentum density in the direction of propagation (longitudinal spin) under tight-focusing. The helicity of light has long been associated with longitudin
Externí odkaz:
http://arxiv.org/abs/2403.12558
Autor:
Forbes, Kayn A.
The optical chirality and spin angular momentum of structured scalar vortex beams has been intensively studied in recent years. The pseudoscalar topological charge $\ell$ of these beams is responsible for their unique properties. Constructed from a s
Externí odkaz:
http://arxiv.org/abs/2402.05621
Autor:
Forbes, Kayn A., Green, Dale
Material anisotropy and chirality produce polarization-dependent light-matter interactions. Absorption leads to linear and circular dichroism, whereas elastic forward scattering produces linear and circular birefringence. Here we highlight a form of
Externí odkaz:
http://arxiv.org/abs/2401.11992
Autor:
Forbes, Kayn A., Green, Dale
We show how both the ellipticity $\eta$ and degree of polarization $\textit{P}$ influences the extraordinary optical chirality properties of non-paraxial vortex beams. We find that, in stark contrast to paraxial optics and non-vortex modes, extremely
Externí odkaz:
http://arxiv.org/abs/2304.02974
Autor:
Forbes, Kayn A, Green, Dale
Here we highlight enantioselective optical gradient forces present in 3D structured optical vortex tweezing systems. One chiral force originates from the circular polarization of the light, while remarkably the other is independent of the input polar
Externí odkaz:
http://arxiv.org/abs/2112.12470
Autor:
Forbes, Kayn A.
Recently arXiv:2004.02970 showed that the extraordinary transverse spin momentum density of spatially confined optical fields is largely independent of polarization. Here it is shown that 3D structured optical vortices which possess the phase factor
Externí odkaz:
http://arxiv.org/abs/2112.11555