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7 papers · 1 filter
Perfect imaging without negative refraction
Ulf Leonhardt
Perfect imaging has been believed to rely on negative refraction, but here we show that an ordinary positively-refracting optical medium may form perfect images as well. In particu…
An omnidirectional retroreflector based on the transmutation of dielectric singularities
Yun Gui Ma, C. K. Ong, Tomas Tyc +1
In the field of transformation optics, metamaterials mimic the effect of coordinate transformations on electromagnetic waves, creating the illusion that the waves are propagating t…
Transformation Optics and the Geometry of Light
Ulf Leonhardt, Thomas G. Philbin
Metamaterials are beginning to transform optics and microwave technology thanks to their versatile properties that, in many cases, can be tailored according to practical needs and…
A Novel Design of Dielectric Perfect Invisibility Devices
T. Ochiai, U. Leonhardt, J. C. Nacher
The aim of an invisibility device is to guide light around any object put inside, being able to hide objects from sight. In this work, we propose a novel design of dielectric invis…
Tunneling mediated by conical waves in a 1D lattice
A. Di Falco, C. Conti, S. Trillo
The nonlinear propagation of 3D wave-packets in a 1D Bragg-induced band-gap system, shows that tranverse effects (free space diffraction) affect the interplay of periodicity and no…
Experimental Observation of Modulation Instability and Optical Spatial Soliton Arrays in Soft Condensed Matter
P. J. Reece, E. M. Wright, K. Dholakia
In this Letter we report observations of optically induced self-organization of colloidal arrays in the presence of un-patterned counter-propagating evanescent waves. The colloidal…