Both classical and quantum waves can form vortices: entities with helical phase fronts and
circulating current densities. These features determine the intrinsic orbital angular …

Ultrafast lasers reaching extremely high powers within short fractions of time enable a
plethora of applications. They grant advanced material processing capabilities, are effective …

The recent prediction and subsequent creation of electron vortex beams in a number of
laboratories occurred after almost 20 years had elapsed since the recognition of the physical …

A miniature forward-viewing endoscopic probe that provides high-resolution 3D
photoacoustic images is demonstrated. The probe is of outer diameter 3.2 mm and …

Nonlinear optics is an essential component of modern laser systems and optoelectronic
devices. It has also emerged as an important tool in probing the electronic, vibrational …

The physics of optical vortices, also known as twisted light, is now a well-established and a
growing branch of optical physics with a number of important applications and significant …

Terahertz frequency (THz) radiation lies in between the microwave and infrared ranges.
While it is strongly absorbed by water, it is nonionizing and has low possibility of causing …

Following the birth of the laser in 1960, the field of" nonlinear optics" rapidly emerged.
Today, laser intensities and pulse durations are readily available, for which the concepts …

That the speed of light in free space is constant is a cornerstone of modern physics.
However, light beams have finite transverse size, which leads to a modification of their wave …

Small, highly absorbing points are randomly present on the surfaces of the main
interferometer optics in Advanced LIGO. The resulting nanometer scale thermo-elastic …