Phase singularities and optical vortices in photonics
Since the second half of the 20th century, ideas to develop methods for the formation of
optical vortices (OVs) or OV beams–regions of circular motion of energy flow in an …
optical vortices (OVs) or OV beams–regions of circular motion of energy flow in an …
Fourier fringe analysis and its application to metrology of extreme physical phenomena: a review
M Takeda - Applied Optics, 2013 - opg.optica.org
The paper reviews a technique for fringe analysis referred to as Fourier fringe analysis (FFA)
or the Fourier transform method, with a particular focus on its application to metrology of …
or the Fourier transform method, with a particular focus on its application to metrology of …
Scattering lens resolves sub-100 nm structures with visible light
The smallest structures that conventional lenses are able to optically resolve are of the order
of 200 nm. We introduce a new type of lens that exploits multiple scattering of light to …
of 200 nm. We introduce a new type of lens that exploits multiple scattering of light to …
Observation of polarization singularities at the nanoscale
M Burresi, RJP Engelen, A Opheij, D van Oosten… - Physical review …, 2009 - APS
With a phase-sensitive near-field microscope we measure independently the two in-plane
electric field components of light propagating through a 2D photonic crystal waveguide and …
electric field components of light propagating through a 2D photonic crystal waveguide and …
Optical vortex metrology for nanometric speckle displacement measurement
W Wang, T Yokozeki, R Ishijima, A Wada… - Optics express, 2006 - opg.optica.org
As an alternative to correlation-based techniques widely used in conventional speckle
metrology, we propose a new technique that makes use of phase singularities in the …
metrology, we propose a new technique that makes use of phase singularities in the …
Circumventing the optical diffraction limit with customized speckles
Speckle patterns have been used widely in imaging techniques such as ghost imaging,
dynamic speckle illumination microscopy, structured illumination microscopy, and …
dynamic speckle illumination microscopy, structured illumination microscopy, and …
Optical vortex metrology based on the core structures of phase singularities in Laguerre-Gauss transform of a speckle pattern
W Wang, T Yokozeki, R Ishijima, M Takeda… - Optics …, 2006 - opg.optica.org
A new technique for displacement measurement is proposed that makes use of phase
singularities in the complex signal generated by a Laguerre-Gauss filter operation applied to …
singularities in the complex signal generated by a Laguerre-Gauss filter operation applied to …
Polarization singularities in 2D and 3D speckle fields
The 3D structure of randomly polarized light fields is exemplified by its polarization
singularities: lines along which the polarization is purely circular (C lines) and surfaces on …
singularities: lines along which the polarization is purely circular (C lines) and surfaces on …
Fractality of light's darkness
Natural light fields are threaded by lines of darkness. For monochromatic light, the
phenomenon is familiar in laser speckle, ie, the black points that appear in the scattered …
phenomenon is familiar in laser speckle, ie, the black points that appear in the scattered …
Experimental Study of Coherence Vortices: Local Properties of Phase Singularities<? format?> in a Spatial Coherence Function
W Wang, Z Duan, SG Hanson, Y Miyamoto, M Takeda - Physical review letters, 2006 - APS
By controlling the irradiance of an extended quasimonochromatic, spatially incoherent
source, an optical field is generated that exhibits spatial coherence with phase singularities …
source, an optical field is generated that exhibits spatial coherence with phase singularities …