Super-reflection and cloaking based on zero index metamaterial

Hao, Jiaming; Yan, Wei; Qiu, Min

doi:10.1063/1.3359428

Cited by 245 publications

(177 citation statements)

References 22 publications

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“…By comparing Fig. S19 b, c, and d, we can see that the linear dispersion bands from 180 to ~202 THz near the point correspond to the refracted beam continuously changing from 6 at 180 THz to 6 at ~202 THz. Due to the fact that there is no side bands above the SU-8 light line in this frequency regime and the fact that the quadratic band crossing the Dirac point cannot be excited by the fundamental TM mode of the input waveguide, there is no side beam in this frequency regime (Fig.…”

Section: S9 Side Beamsmentioning

confidence: 94%

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On-chip zero-index metamaterials

et al. 2015

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Summary: Metamaterials with a refractive index of zero exhibit physical properties such as infinite phase velocity and wavelength. However, there is no way to implement these materials on a photonic chip, restricting the investigation and application of zero-index phenomena to simple shapes and small scales. We designed and fabricated an on-chip integrated metamaterial with a refractive index of zero in the optical regime. Light refracts perpendicular to the facets of a prism made of this metamaterial, directly demonstrating that the index of refraction is zero. The metamaterial consists of low-aspect-ratio silicon pillar arrays embedded in a polymer matrix and clad by gold films. This structure can be fabricated using standard planar processes over a large area in arbitrary shapes and can efficiently couple to photonic integrated circuits and other optical elements. This novel on-chip metamaterial platform opens the door to exploring the physics of zero-index and its applications in integrated optics.

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Section: S9 Side Beamsmentioning

confidence: 94%

“…All fields within the material oscillate in unison, achieving electrostatic behavior at optical frequencies 4 . This regime allows access to a wealth of exciting physical phenomena and potential applications including super-coupling, cloaking, and new approaches for phase matching in nonlinear optics 3,[5][6][7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

On-chip zero-index metamaterials

et al. 2015

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“…An interesting phenomenon that takes place within EMNZ-bounded environments is the unconventional scattering performance of PEC objects embedded in an EMNZ medium. Recently, there has been some lines of work investigating the behaviour of zero-index media when loaded by various structures and the ability of these systems to manipulate the transmission and reflection profile owing to the unique scattering performance within zero-index media [21][22][23][24] .…”

Section: Resultsmentioning

confidence: 99%

“…S, Silveirinha, M. & Engheta, N., manuscript in preparation), and to overcome the problem of weak coupling between different electromagnetic components that are conventionally not well matched, for example, in a coaxial to waveguide transition 20 . Another interesting field of research has been about manipulating the transmission characteristics using near-zero media [21][22][23][24] where such media have been loaded by certain properly designed inclusions that allow shaping of the system's transmission profile.…”

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confidence: 99%

Wave–matter interactions in epsilon-and-mu-near-zero structures

2014

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In recent years, the concept of metamaterials has offered platforms for unconventional tailoring and manipulation of the light-matter interaction. Here we explore the notion of 'static optics', in which the electricity and magnetism are decoupled, while the fields are temporally dynamic. This occurs when both the relative effective permittivity and permeability attain near-zero values at a given operating frequency. We theoretically investigate some of the resulting wave features in bounded scenarios, such as unusual radiation characteristics of an emitter embedded in such epsilon-and-mu-near-zero media in bounded environments. Using such media, one might in principle 'open up' and 'stretch' the space, and have regions behaving electromagnetically as 'single points' despite being electrically large. We suggest a possible design for implementation of such structures using a single dielectric rod inserted in a waveguide operating near its cutoff frequency, providing the possibility of having electrically large 'empty' volumes to behave as epsilon-and-mu-near-zero media.

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“…[18], the direction of EMW propagating with zero phase delay in the PhC slab can be easily manipulated by adjusting the incident angle, and the effect of zero phase delay can be realized within a wide scope of incident angle from 28 to 40 in this case. Different from the finite plasma frequency of such materials follow Drude or Drude-Lorenz dispersion models [10,27,28], the zero phase delay propagation of EMW based on the wavefront modulation can be realized at different frequencies for a certain PhC as long as the k   gr = 0 condition is satisfied. These unique features of this effect may show great impacts on both fundamental physics and optical device applications.…”

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confidence: 99%

Zero phase delay induced by wavefront modulation in photonic crystals

2013

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A new mechanism for generation of efficient zero phase delay of electromagnetic wave propagation based on wavefront modulation is investigated in this paper. Both numerical simulations and experiment have demonstrated the zero phase delay behaviors of wave propagation in a two-dimensional triangular photonic crystal. The zero phase delay propagation, independent of the propagating distance, is attributed to an invariable wavefront modulation of photonic crystal in the direction of wave propagation, where the phase velocity is perpendicular to the group velocity with parallel wavefronts (or phasefronts) extending along the direction of energy flow. This effect can be extended to the three-dimensional cases or other artificially engineered materials, and may open a new route to obtain perfect zero-phase-delay propagation for electromagnetic wave instead of using zero-index or zero-averaged-index materials and have significant potential in many applications.Recently, great efforts have been made to construct materials with zero or near-zero-n with quasi-uniform phase and infinite wavelength [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Zero-n materials have a series of exciting potential applications, such as wavefront reshaping [10], beam self-collimation [5,13], extremely convergent lenses [17], etc. One of their most important applications is the optical links in lumped nanophotonic circuits that can guide light over hundreds of wavelengths without introducing phase variations so as to reduce the unwanted effects of frequency dispersion. Several different strategies have been applied to realize the zero-n material (or zero permittivity ε). One of them was to use metallic metamaterial structures with effective permittivity and/or permeability near zero [7,8]. Usually these materials suffer from strong resonance loss and hence the greatly deteriorated transmission efficiency. Alternative approaches include the microwave waveguides below cutoff [9], the combination of negative-and positive-index materials [13] or the periodic superlattice formed by alternating strips of positive index homogeneous dielectric media and negative index photonic crystals (PhCs) [18] with zero phase accumulation of a wave travelling through the whole superlattice. However, all these configurations require high fabrication precision and complicated architecture. Therefore, it is preferred to find an efficient and simpler way to achieve zero phase delay propagation of electromagnetic wave (EMW).Wavefront modulation supplies a novel method to realize equal phase

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Super-reflection and cloaking based on zero index metamaterial

Cited by 245 publications

References 22 publications

On-chip zero-index metamaterials

On-chip zero-index metamaterials

Wave–matter interactions in epsilon-and-mu-near-zero structures

Zero phase delay induced by wavefront modulation in photonic crystals

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