Speckle patterns are a powerful tool for high-precision metrology because they enable
remarkable performance in relatively simple setups. Nonetheless, researchers in this field …

In the past three decades, we have witnessed the explosive development of micro/nano
science and technology, where remarkable research efforts have been made in synthesizing …

On-chip twisted light emitters are essential components of orbital angular momentum (OAM)
communication devices 1, 2. These devices address the growing demand for high-capacity …

Speckle study constitutes a multidisciplinary area with inherent complexities. In order to
conquer challenges such as the variability of samples and sensitive measurements …

Recently a spatial spiral phase filter in a Fourier plane of a microscopic imaging setup has
been demonstrated to produce edge enhancement and relief-like shadow formation of …

Multiplexing and demultiplexing of optical orbital angular momentum (OAM) are critical
operations in mode-division multiplexing communications. Traditional Dammann gratings …

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 …

Laser interferometry is favored for its non-contact, high-resolution, and dynamic range
capabilities. Vortex beams can enhance accuracy and robustness with their degrees of …

Nanophotonics deals with the diffraction of light from objects with nanoscale features. This
book addresses cutting-edge problems in the field of nanophotonics as well as a wide …

Interference of optical beams with optical vortices is often encountered in singular optics.
Since interferometry makes the phase observable by intensity measurement, it brings out a …