It is well known that quantum coherence and interference are important mechanisms in tailoring optical properties of atoms and molecules. Examples are the enhancement of the index of refraction, large optical Kerr nonlinearities, and the cancellation of absorption. Nonlinear media provide a variety of new applications, such as ultra-slowing of light propagation, superluminal light propagation, ...

OBJECTIVES We compared the expelled air dispersion distances during coughing from a human patient simulator (HPS) lying at 45° with and without wearing a surgical mask or N95 mask in a negative pressure isolation room. METHODS Airflow was marked with intrapulmonary smoke. Coughing bouts were generated by short bursts of oxygen flow at 650, 320, and 220L/min to simulate normal, mild and poor c...

For practical application, optical limiting materials must exhibit a fast response and a low threshold in order to be used for the protection of the human eye and electro-optical sensors against intense light. Many nanomaterials have been found to exhibit optical limiting properties. Laser ablation offers the possibility of fabricating nanoparticles from a wide range of target materials. For pr...

We develop novel designs enabling slow-light propagation with vanishing group-velocity dispersion ("frozen light") and slow-light with large delay-bandwidth product, in periodic nanowires. Our design is based on symmetry-breaking of periodic nanowire waveguides and we demonstrate its vailidy through two- and three-dimensional simulations. The slow-light is associated with a stationary inflectio...

Miniature slow light devices based on the recently developed Surface Nanoscale Axial Photonics (SNAP) technological platform is reviewed. The theory and experimental demonstration of the SNAP bottle resonator dispersionless delay line and dispersion compensator are presented. Keywords— Nanophotonics, microresonators, microfibres

We study the Casimir pressure for a dielectric-diamagnetic cylinder subject to light velocity conservation and with a dispersion law analogous to Sellmeir’s rule. Similarities to and differences from the spherical case are pointed out.