Journal ArticleDOI
Experimental investigation of local properties and statistics of optical vortices in random wave fields.
TLDR
The Berry anisotropy ellipse describing the anisotropic squeezing of phase lines close to vortex cores is observed and the Dennis angular momentum rule for its phase is quantitatively verified.Abstract:
We present the first direct experimental evidence of the local properties of optical vortices in a random laser speckle field. We have observed the Berry anisotropy ellipse describing the anisotropic squeezing of phase lines close to vortex cores and quantitatively verified the Dennis angular momentum rule for its phase. Some statistics associated with vortices, such as density, anisotropy ellipse eccentricity, and its relation to zero crossings of real and imaginary parts of the random field, are also investigated by experiments.read more
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Journal ArticleDOI
Optical vortex metrology for nanometric speckle displacement measurement.
Wei Wang,Tomoaki Yokozeki,Reika Ishijima,Atsushi Wada,Yoko Miyamoto,Mitsuo Takeda,Steen Grüner Hanson +6 more
TL;DR: Experimental results are presented that demonstrate the validity and the performance of the proposed optical vortex metrology with nano-scale resolution.
Journal ArticleDOI
Polarization singularities in 2D and 3D speckle fields.
TL;DR: The results confirm previous analytical predictions regarding the statistical distribution of types of C points and relate their 2D properties to their 3D structure.
Journal ArticleDOI
Optical vortex metrology based on the core structures of phase singularities in Laguerre-Gauss transform of a speckle pattern
TL;DR: Experimental results for translational and rotational displacement measurements are presented that demonstrate large dynamic range and high spatial resolution of the proposed optical vortex metrology.
Journal ArticleDOI
Experimental study of coherence vortices: local properties of phase singularities in a spatial coherence function.
TL;DR: This work reports the first direct and quantitative experimental measurement of a generic coherence vortex, controlled by controlling the irradiance of an extended quasimonochromatic, spatially incoherent source.
Journal ArticleDOI
Fourier fringe analysis and its application to metrology of extreme physical phenomena: a review [Invited]
TL;DR: Examples include the measurement of extremely small magnetic fields with subfluxon sensitivity by electron wave interferometry, subnanometer wavefront evaluation of projection optics for extreme UV lithography, the detection of sub-Ångstrom distortion of a crystal lattice, and the measurements of ultrashort optical pulses in the femotsecond to attosecond range.