Photo Gallery
3-D acoustic cloaking deviceResearch scientist Bogdan Popa with a 3-D acoustic cloaking device constructed with components created in a 3-D printer. (photo by Duke Photography)
3-D acoustic cloaking deviceResearch scientist Bogdan Popa with a 3-D acoustic cloaking device constructed with components created in a 3-D printer. (photo by Duke Photography)
3-D microwave cloakResearch scientist Stephane Larouche (left) and graduate student John Hunt at a 3-D printer. (photo by Duke Photography)
3-D microwave cloakGraduate student John Hunt displays a spherical 3-D microwave cloak, components of which were created in the 3-D printer behind him. (photo by Duke Photography)
3-D microwave cloakGraduate student John Hunt displays a circular 3-D microwave cloak, components of which were created in the 3-D printer behind him. (photo by Duke Photography)
3-D microwave cloakGraduate student John Hunt displays a spherical 3-D microwave cloak, components of which were created in the 3-D printer behind him. (photo by Duke Photography)
3-D printed invisibility cloakYaroslav Urzhumov, assistant research professor in electrical and computer engineering at Duke, with a 3-D printed invisibility cloak that can deflect microwave beams. (photo by Duke Photography)
3-D printed invisibility cloakYaroslav Urzhumov, assistant research professor in electrical and computer engineering at Duke, with a 3-D printed invisibility cloak that can deflect microwave beams. (photo by Duke Photography)-
3-D printed invisibility cloakYaroslav Urzhumov, assistant research professor in electrical and computer engineering at Duke, with a 3-D printed invisibility cloak that can deflect microwave beams. (photo by Duke Photography) -
CLEO 2013Current and former CMIP members attend CLEO, The Conference on Lasers and Electro-Optics. -
APS 2013Costas M. Soukoulis, John B. Pendry and David R. Smith, recipients of the 2013 James C. McGroddy Prize of APS for New Materials. -
APS 2013David R. Smith, Costas M. Soukoulis and John B. Pendry, recipients of the 2013 James C. McGroddy Prize of APS for New Materials. -
Metamaterial ImagerPotential use of "sensor" developed by engineers in the Meta Groupsuch is for airport security scanners. -
Metamaterial apertures for computational imagingNovel "sensor" developed by engineers in the Meta Group is more efficient, versatile, and cheaper for potential use in such applications as airport security scanners, and collision avoidance systems for aircraft cars or maritime vessels. -
John Hunt and Tom DriscollDuke researchers reported their findings on novel sensor January 18 on-line in the journal Science. (photo by Duke Photography) -
Controlling ReflectanceNew metamaterial developed by the Meta Group has three major components - a thin layer of gold film coated with a nano-thin layer of an insulator, topped off with a dusting of millions of self-assembled nanocubes. -
David Smith and Cristian CiraciThe results of Cristian Ciraci and co-workers' experiments, controlled-reflectance surfaces with film-coupled colloidal nanoantennas, were published in the journal Nature. (photo by Duke Photography) -
Unidirectional cloakFabricated cloak for microwave frequencies. (Photo by Les Todd, Duke University Photography) -
Unidirectional cloakNathan Landy with fabricated cloak for microwave frequencies. (Photo by Les Todd, Duke University Photography) -
Unidirectional cloakNathan Landy with fabricated cloak for microwave frequencies. (Photo by Les Todd, Duke University Photography) -
Figure 1: Simulations of the fabricated cloak designSimulations of the fabricated cloak design. (a) 3D representation of the fabricated cloak. The cloak was designed to circumscribe a cylinder of radius R=7.5 cm. (b) 3D Finite-Element Simulation of an electromagnetic wave incident from the left on the cloak. The dashed line indicates the extent of the taper beyond the edge of the metamaterial region. -
Figure 2: Photographs of the fabricated cloak(a) A photograph of the full cloak. (b) A photograph of an internal material interface. The labelled arrows depict the orientation of the local coordinate system. The corrugations run along x, provding an effective response in that direction. Each strip has been shifted along x so that there is no discontinuity at the interior boundaries of the cloak. (c) A photograph of the material with overlayed arrows depicting the in-plane lattice vectors for the metamaterial unit cell. The vectors are twice the length of the lattice vectors to aid visibility. -
Figure 3: Metamaterial Unit Cell Design(left, inset) A diagram depicting the MM unit cell. The listed dimensions are give in millimeters. The line width and separation between metalizations is 250 μm. The SRR is mirrored in the back of each unit cell which suppresses the inherent bi-anisotropy of the SRR in this configuration. (right, inset) a plot of the retrieved material parameters as a function of frequency in the vicinity of 10 GHz (vertical dashed line). -
Figure 4: Measured Electric field data for free space, the cloak and a copper cylinder at the optimum cloaking frequency of 10.2 GHz(a),(b), and (c) depict the absolute value of the field in decibels for free space, the cloak and the cylinder, respectively. (d), (e), and (f) depict an instanteneous snapshot of the measured fields. The scaling on the top row is in dB, normalized to the maximum measured field. The scaling on the bottom row is linear and normalized to the maximum and minimum values of the instantaneous field. The scaling is given by the colorbars on the top and bottom of the figure for the field amplitude and instantaneous field, respectively. Animations of the instantaneous fields of the cloak and cylinder are availabe online as supplementary videos one and two, respectively. -
Unidirectional cloakThis figure depicts the expected behavior of the cloak based on computational simulations. The diamond-shaped cloak is outlined with solid black lines. Any object placed in the central green region is rendered invisible. The color map represents an incident electromagnetic wave from the left. The cloaking material splits the incident wave, guides it around the object, and recombines it on the right. Since the electromagnetic wave does not interact with the cloaked region, any item placed in his region would be hidden from observers on the left or right. -
Unidirectional cloakThis figure shows the fabricated cloak for microwave frequencies. The cloak appears as strips to the naked eye, but it interacts with microwaves to reproduce the effect seen in the first figure. -
Metamaterials earns Science Magazine CoverLead Author Cristian Ciraci's article "Probing the Ultimate Limits of Plasmonic Enhancement" makes the cover of the September issue of SCIENCE Magazine. CMIP researchers collaborated with Imperial College, London. -
Nonlinear Magnetoelectric CouplingAn array of split-ring resonators grabs hold of both electric and magnetic fields, wherein embedded variable capacitance diodes (varactors) alter the frequency, or 'color,' of the microwave radiation. -
-
-
David Smith and Nathan KundtzDavid Smith and Nathan Kundtz (photo by Duke Photography)
David Smith and Nathan KundtzDavid Smith and Nathan Kundtz (photo by Duke Photography)
David Smith and Nathan KundtzDavid Smith and Nathan Kundtz (photo by Duke Photography)
