Zhenyu Wan

2 months ago | nature.com | Zhenyu Wan |Ziyi Tang |Miles J. Padgett

AbstractIn recent years, with the clarification of the mechanism of the rotational Doppler effect (RDE), there has attracted extensive attention to its development of applications, especially in the detection of the angular velocity of rotating objects. On the other hand, optical fiber technology is widely applied in laser velocimetry from beam delivery to scattered light collection, aiding the miniaturization of instruments.

2 months ago | onlinelibrary.wiley.com | Ziyi Tang |Zhenyu Wan |Xi Zhang |Yize Liang

Graphical Abstract Velocity Detection In article number 2401302, Jian Wang and co-workers propose a remote vector velocimeter based on spatially structured amplitude fields for monitoring the angular velocities of objects.

Oct 17, 2024 | onlinelibrary.wiley.com | Ziyi Tang |Zhenyu Wan |Xi Zhang |Yize Liang

Conflict of Interest The authors declare no conflict of interest. Supporting Information Filename Description lpor202401302-sup-0001-SuppMat.docx2 MB Supporting Information References 1, , Appl. Phys. Lett. 1964, 4, 176 . 2, , , , Laser Doppler and Phase Doppler Measurement Techniques, Springer Science & Business Media, Berlin, Heidelberg, Germany, 2003. 3, , Spatial Filtering Velocimetry, Fundamentals and Applications, Springer, Berlin, Heidelberg, 2006. 4, , Opt.

Feb 9, 2024 | opg.optica.org | Jian Wang |Zhenyu Wan |Ziyi Tang

Recently, studies have shown that the spatial confinement on waves or photons with beam shaping techniques would modify the propagation speed of optical fields including both group and phase velocities. Particularly, for the monochromatic spatially structured beams, the reduced longitudinal wave vector enables the phase velocity to be superluminal, causing a lagging propagation phase.