Superscatterer: Enhancement of scattering with complementary media

Yang, Tao; Chen, Huanyang; Luo, Xudong; Ma, Hongru

doi:10.1364/oe.16.018545

Cited by 245 publications

(202 citation statements)

References 22 publications

Supporting

Mentioning

200

Contrasting

Unclassified

Order By: Relevance

“…ε r is the wavenumber in the dielectric cylinder, and J n and H (1) n are the n-th order Bessel function of the first kind and Hankel function of the first kind, respectively [33]. Since the degeneracy between |s n | and |s −n | are considered in Eq.…”

Section: Bohr Model For Graphene Based Structuresmentioning

confidence: 99%

“…S UPERSCATTERER is a device that can magnify the scattering cross section of a given object remarkably [1], [2]. This concept was first proposed based on the transformation optics approach, where the scattering cross section of a cylindrical perfect electric conductor (PEC) is enhanced by an anisotropic and inhomogeneous electromagnetic cover [1], [2], [3], [4], [5], [6], [7], [8].…”

Section: Introductionmentioning

confidence: 99%

“…This concept was first proposed based on the transformation optics approach, where the scattering cross section of a cylindrical perfect electric conductor (PEC) is enhanced by an anisotropic and inhomogeneous electromagnetic cover [1], [2], [3], [4], [5], [6], [7], [8]. Alternatively, for subwavelength objects, a superscatterer can be designed by the metal-dielectric layers, where the scattering cross section is magnified due to the enhancement of the localized surface plasmons [9], [10].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design of Ultracompact Graphene-Based Superscatterers

Zheng

Lin

et al. 2017

IEEE J. Select. Topics Quantum Electron.

View full text Add to dashboard Cite

Abstract-The energy-momentum dispersion relation is a fundamental property of plasmonic systems. In this paper, we show that the method of dispersion engineering can be used for the design of ultra-compact graphene-based superscatterers. Based on the Bohr model, the dispersion relation of the equivalent planar waveguide is engineered to enhance the scattering cross section of a dielectric cylinder. Bohr conditions with different orders are fulfilled in multiple dispersion curves at the same resonant frequency. Thus the resonance peaks from the first and second order scattering terms are overlapped in the deepsubwavelength scale by delicately tuning the gap thickness between two graphene layers. Using this ultra-compact graphenebased superscatterer, the scattering cross section of the dielectric cylinder can be enhanced by five orders of magnitude.

show abstract

Section: Bohr Model For Graphene Based Structuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design of Ultracompact Graphene-Based Superscatterers

Zheng

Lin

et al. 2017

IEEE J. Select. Topics Quantum Electron.

View full text Add to dashboard Cite

show abstract

“…The most celebrated example is the invisibility cloaks. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Other examples include field concentrators, 19 field rotators, [20][21][22] electromagnetic wormholes, 23 impedance-matched hyperlenses, 24 field shifters, 25,26 anticloaks, 27 cylindrical superlenses, 28 superscatterers, 29 superabsorbers, 30 and remote cloaks ͑or invisibility umbrellas͒. 31,32 However, the experimental fabrication of these novel devices requires sophisticated man-made metamaterial, which may not be always feasible to make.…”

mentioning

confidence: 99%

“…The constitutive parameters for transverse magnetic ͑TM͒ ideal cloak can be obtained by making the substitution ͕ r → r , → , z → z ͖ in ͑1͒. By varying the functional form, we can achieve a varieties of functionalities such as the concentrator 21 ͑or the impedance-matched hyperlens 24 ͒, the anticloak 27 and the superscatterer, 29 cylindrical superlenses, 28 etc. However, these parameters involve spatially varying, anisotropy permittivity, and permeability, which can be formidably difficult to fabricate.…”

mentioning

confidence: 99%

General transformation for the reduced invisibility cloak

Chen

Lee

et al. 2009

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

We present a generalized perspective for "reduced" invisibility cloaks, which formulates a general way to "reduce" the cloak so that it can be realized more easily. We show explicitly that several published reduced cloak designs are in fact special cases of a more general transformation. Furthermore, we showed that a cylindrical reduced cloak is linked to a cylindrical isotropic inhomogeneous object by exactly the coordinate transformation that one applies on an ideal cloak. This perspective also suggests an alternative but easier way to calculate the scattering properties of the reduced cloaks. DOI: 10.1103/PhysRevB.80.085112 PACS number͑s͒: 41.20.Jb, 42.25.Fx, 42.79.Ϫe, 42.25.Gy Transformation optics 1,2 is a powerful and versatile theoretical tool that enables the design of various kinds of novel metamaterial devices. The most celebrated example is the invisibility cloaks. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Other examples include field concentrators, 19 field rotators, 20-22 electromagnetic wormholes, 23 impedance-matched hyperlenses, 24 field shifters, 25,26 anticloaks, 27 cylindrical superlenses, 28 superscatterers, 29 superabsorbers, 30 and remote cloaks ͑or invisibility umbrellas͒. 31,32 However, the experimental fabrication of these novel devices requires sophisticated man-made metamaterial, which may not be always feasible to make. For this reason, researchers have attempted to "reduce" the complexity of the required constitutive parameters. The functionalities of these reduced devices, such as the reduced cloak, 3,5-7 are slightly less perfect compared to the original ideal devices, but they are designed to perform satisfactorily while having the advantage that they are much easier to fabricate. Indeed, the "reduced devices" will become those that shall be useful for real applications as the ideal devices are probably too difficult or expensive to make. So, there is a good reason that much effort 8,9,11-13 has been devoted to study the reduced cloaks. For example, a reduced cloak working in the microwave frequency was realized experimentally in 2006. 5 More recently, the "ground-plane cloak" 16 ͑also known as the "one-dimensional cloak 14,26 "͒, which has a broad working frequency spectrum, was also realized.For simplicity, we shall only consider the two dimensional case in this paper. The spatially varying constitutive parameters for the transverse electric ͑TE͒ ideal cloak are given bywhere f͑r͒ is the mapping function. The constitutive parameters for transverse magnetic ͑TM͒ ideal cloak can be obtained by making the substitution ͕ r → r , → , z → z ͖ in ͑1͒. By varying the functional form, we can achieve a varieties of functionalities such as the concentrator 21 ͑or the impedance-matched hyperlens 24 ͒, the anticloak 27 and the superscatterer, 29 cylindrical superlenses, 28 etc. However, these parameters involve spatially varying, anisotropy permittivity, and permeability, which can be formidably difficult to fabricate. Consequently, it is essential for one to "reduce" or ...

show abstract

Superscatterer Illusions Without Using Complementary Media

Wang

et al. 2014

Advanced Optical Materials

View full text Add to dashboard Cite

towards cloaking on the basis of two-fold operations. The fi rst step lies in the scattering cancellation of the original object using complementary media, whereas the latter step is to restore the pre-designed scattering signature of any desired object by employing restoring media based on exotic spatial transformations. A superscatterer [ 14 ] is an example of an illusion device whose scattering signature equals that of an enlarged object. However, the necessary complementary media, i.e., the double-negative materials which have important implications in perfect lenses, [ 15,16 ] external cloaks, [ 17,18 ] and microwave circuits and antennas, [19][20][21][22] have restricted considerably their applications because in some cases it is impossible to create a lossless complementary media. In this regard, illusion devices comprising only positive metamaterials have been proposed and fabricated, which can either reduce the size or change a material property of the original object. [23][24][25] Most recently, an illusion device that can alter the scattering center of the original object by introducing two additional isolated objects was designed based on the TO method. [ 26 ] However, this scheme is still confi ned to the shrinking illusion functionality. Moreover, the permeability components are extremely small, which potentially poses stringent requirements on the precision of fabrication. In comparision to the transmission line-based devices using resistor-inductor-capacitor networks to mimic specifi c material properties, [ 13 ] other illusion devices in the literature [23][24][25][26] are based on light-matter interactions and have more relevance to wave dynamics in free space, and thus are not limited to low-frequency operations, prohibitively expensive costs, and complex fabrication processes. However, a superscatterer illusion device not using complementary media has not been reported, neither in theoretical design nor experimental verifi cation.In this work, we propose conceptually and demonstrate experimentally a superscatterer illusion device with abundant functionality inspired by the concept of magnifying lenses. [ 27,28 ] The main idea behind the presented functionality is to combine the magnifying TO theory and advanced metamaterial technology. To verify the proposed scheme, a proof-of-concept sample made of 6408 gradually varying meta-atoms is designed with the required complex inhomogeneous and anisotropic material properties by combining compact electric and magnetic resonant elements.Research has suggested that it is possible to create a superscatterer using complementary media, which is however very diffi cult to realize, and hence such a superscatterer has not been verifi ed by experiments. An easier way to realize superscatterer illusions with abundant functionality based on transformation optics is proposed here, in which only anisotropic and inhomogeneous media with positive components are required. By enclosing a metallic object within the superscatterer illusion device, the scattering signat...

show abstract

Superscatterer: Enhancement of scattering with complementary media

Cited by 245 publications

References 22 publications

Design of Ultracompact Graphene-Based Superscatterers

Design of Ultracompact Graphene-Based Superscatterers

General transformation for the reduced invisibility cloak

Superscatterer Illusions Without Using Complementary Media

Contact Info

Product

Resources

About