Since its inception in 2006, transformation optics has become an established tool to understand and design electromagnetic systems. It provides a geometrical perspective into the properties of light waves without the need for a ray approximation. Most studies have focused on modifying the trajectories of light rays, e.g. beam benders, lenses, invisibility cloaks, etc. In this contribution, we e...

Geometric phase is ubiquitous in systems that undergo cyclic transformations in either parameter or state space. Manifestations of this phase have been found in many physical systems. In optics, geometric phase has had an important effect, enhancing the way optical systems are analyzed, and stimulating the discovery of interesting effects and new applications. Two well-investigated manifestatio...

Abstract Metasurfaces based on geometric phase acquired from the conversion of optical spin states provide a robust control over wavefront light, and have been widely employed for construction various types functional metasurface devices. However, this powerful approach cannot be readily transferred to manipulation acoustic waves because do not possess degree freedom. Here, we propose concept g...

The two main approaches for the description of sound fields are methods derived from solutions of the wave equation and geometric methods based on analogies to ray optics. Their mathematical representations are reviewed and it is shown that representations by projective geometry and descriptions by Fourier acoustics lead to similar parametric representations of sound fields.

We distinguish geometric cell structures using a deformable mirror for high-throughput, label-free flow cytometry, overcoming approaches that can result in undesirable chemical modifications or low throughput. OCIS codes: (170.0110) Imaging systems; (170.1530) Cell analysis; (110.1080 ) Active or adaptive optics

We show that any stationary solution to the n-dimensional Euler equations is linearly unstable in the norm of H(Ω), for any s 6= 1 n−1 , if it possesses a locally non-isochronous periodic streamline. The proof uses the technique of linear geometric optics.

The notion of a wormhole was first introduced in 1962 by John Wheeler [1] who reinterpreted the Einstein-Rosen bridge [2] as a connection between two distant places in spacetime with no mutual interaction. However, he realized together with Robert Fuller [3] that this Schwarzschild wormhole cannot be traversed even by a single particle. In 1988, Michael Morris and Kip Thorne [4] presented the m...

We comment on the recent Letter [Opt. Lett.38, 2666 (2013)10.1364/OL.38.002666], in which the authors presented an imaging technique called light field moment imaging. We wish to show that this method can be associated with transport of intensity equation at the geometric optics limit.

A nanolayered polymer films fabrication approach creating Gradient Refractive INdex (GRIN) lenses with designer RI distribution profiles is reviewed. Fabricated GRIN examples are presented demonstrating unparalleled RI profile design freedom and scalable optic size. OCIS codes: (080.0080) Geometric Optics; (160.0160) Materials

The paper presents two designs of combined prismatic-parabola-cylindrical stationary concentrators. They reach 8.4X and 10.4X concentration levels for nonsymmetrical and symmetrical concentrators correspondingly and can be used with solar cells for electricity and heat generation. ©2010 Optical Society of America OCIS codes: (220.1770) Concentrators; (220.4298) Nonimaging optics; (220.2740) Geo...