Beams exhibiting long focal lines and small focal spot sizes are desired in a variety of
applications and are called optical needles, with Bessel beams being a common example …

Long focal lines with transverse spot sizes as small as a few wavelengths are called optical
needles. A zeroth order Bessel beam being a good example is widely used in such …

Bessel beams are known for their property of maintaining propagation-invariant transverse
intensity distribution. The true Bessel beams has unlimited energy, however the …

Light-field shaping technology plays an important role in optics and nanophotonics. For
instance, the spatially structured light field, which exhibits characteristic features in complex …

In this work, we propose a method for generating double-ring-shaped cylindrical vector
beams by modulating Pancharatnam–Berry phase (PBP). The theoretical analysis shows …

Invariant Bessel–Gauss beams have attracted great interest for transparent material
microprocessing applications. The small central peak and elongated focal region of the …

Bessel beams have been extensive studied to date but are always created over a finite
region inside the laboratory. Means to overcome this consider multi-element refractive …

Propagation-invariant vectorial Bessel beams with linearly polarized axial symmetry based
on quantized Pancharatnam–Berry phase optical elements are described. The geometric …

We demonstrate the possibility of creating optical beams with phase singularities engraved
into exotic intensity landscapes imitating the shapes of a large variety of diverse plane …

Traditional manipulation of light generally employs diffractive optical elements such as
binary phase or amplitude masks. However, we have found that vector Bessel-Gaussian …