Illusion induced overlapped optics

Zang, Xiaofei; Shi, Cheng; Li, Zhou; Chen, Lin; Cai, Bin; Zhu, Yiming; Zhu, Haibin

doi:10.1364/oe.22.000582

Cited by 15 publications

(9 citation statements)

References 46 publications

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“…Although this phenomenon is well-known, for a long time there were no general methods to design such an optical illusion device [1,2] which could make one object appear like another object until transformation optics (TO) [3,4] was proposed. One example is the well-known dessert mirage, where the air, with a gradient refractive index, makes the dessert appear like a city, an oasis, or something else.…”

Section: Illusion Opticsmentioning

confidence: 99%

“…One example is the well-known dessert mirage, where the air, with a gradient refractive index, makes the dessert appear like a city, an oasis, or something else. Although this phenomenon is well-known, for a long time there were no general methods to design such an optical illusion device [1,2] which could make one object appear like another object until transformation optics (TO) [3,4] was proposed. TO is a mathematical tool to calculate the electromagnetic parameters of one device with predefined functions by relating the material parameters and its spatial geometry based on the invariance of Maxwell's equations.…”

Section: Illusion Opticsmentioning

confidence: 99%

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Illusion Optics: Disguising with Ordinary Dielectric Materials

Liu

Guo

2018

Advanced Materials

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complementary medium by a superlens in order to cancel the scattering of object A, and then to shift another object (B) into the position of object A, therefore, when we detect the scattering pattern we will find that object A appears like object B. TO is a strict method to design illusion devices in theory. However, some restrictions should be noted: (I) Complementary media and superlenses are composed of negative index materials, which require the help of evanescent waves to fulfill the functions of illusion devices. Therefore, in order to ensure the performance of the illusion, the external device (superlens) and the object should be as close as possible (in the near field) to receive adequate evanescent waves. (II) The introduction of negative index materials inevitably makes the device loss sensitive, which is a key factor limiting its performance. (III) The material parameters of the device are very complex, including negative index materials, magnetic materials, anisotropic materials, etc. These are a few of the main reasons why these illusion devices are too difficult to put into real applications.In addition to the method of TO, a new way to artificially manipulate electromagnetic waves has been proposed in 2015 by using spatial Kramers-Kronig (KK) media. [26] This method modifies the scattering potentials in the wave vector domain and makes the scattering potentials zero in the backward direction, that is, no reflections. This method has also been employed to design absorbers and invisibility cloaks. [27][28][29][30] Due to the asymmetrical properties of the scattering potentials, these KK media always require complex materials (with loss or gain). A similar method has been proposed recently to design all-dielectric cloaks, [31] which eliminates two symmetrical areas of scattering potentials in the 2D wave vector domain to make the object invisible within a specified frequency band, and the symmetric conditions ensure that the material has no loss or gain. Besides the above method, some other methods [32,33] for cloaking and illusions are also interesting, for example, characteristic mode method, [34] metasurface method. [35] Our method has several advantages compared with the conventional TO method: first, no external devices are needed in our design because we only slightly modify the scattering potential of the object and the nearby surroundings, which is more of a cosmetic operation for an object; second, no negative refractive index materials are introduced, which is a key factor restricting the effect of the illusion; third, all of the materials are isotropic, nonmagnetic, and with relative permittivity above unity, which makes this method more feasible for real applications of illusion. Now we show the designing method by deducing the relation between the scattering amplitude and the Fourier component of the scattering potential. Considering the 2D case (in

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Section: Illusion Opticsmentioning

confidence: 99%

Section: Illusion Opticsmentioning

confidence: 99%

Illusion Optics: Disguising with Ordinary Dielectric Materials

Liu

Guo

2018

Advanced Materials

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show abstract

“…In the past few years, transformation optics has shaped up a revolutionary electromagnetic design paradigm, enabling the researchers to create astonishing metamaterial devices that seemed impossible a decade ago, such as invisibility cloak, perfect lens and illusion device [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Among various novel devices, metamaterial concentrator as an important wave-manipulation device has recently received considerable attention.…”

Section: Introductionmentioning

confidence: 99%

Inverse design based metamaterial concentrator and its applications and realization

Huang

Yang

et al. 2015

Optik

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“…Various approaches have been performed to lyse cell such as chemical reagents or enzymes to degrade cell membranes [1,2], mechanical forces to puncture the cell membranes [3], low-strength electric fields to penetrate cells [4,5], and high temperatures to disrupt cell membranes [6]. Overall, the lysis method mainly depends on cell type, samples characteristics and operation process [7].…”

Section: Introductionmentioning

confidence: 99%

Use of membrane separation device for extraction of intracellular protein and DNA

Yu¹,

Liu²,

Dai³

et al. 2015

Proceedings of the 2015 International Conference on Advanced Engineering Materials and Technology

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Abstract. In this paper, a membrane separation device is proposed and demonstrated to be able to lyse cells and extract intracellular protein and DNA. The device consists of cell pretreatment chamber, microfiltration unit, membrane separation unit, fluid reservoir unit and control units. The pretreatment method incorporates chemical lysis reagents and mechanical vibration induced by a micro-pump to perform cell lysis. The membrane separation module is equipped with a replaceable membrane. The ultrafiltration membrane and silica membrane are used to extract intracellular protein and DNA, respectively. The results show that the cell lysis can be achieve effectively by the pretreatment unit at the help of vibration on the membrane. The target protein was obtained using UF membrane with different molecular weight cut-off, and the silica membrane in the device had an excellent ability of extraction of intracellular DNA. The working device suggests an inexpensive, easy to be fabricated and effective method for cell lysis and extraction of intracellular protein and DNA. The resulting extraction is suitable for downstream protein and nucleic acid analysis and detection without requiring further preparation. This device can be easily integrated with other downstream components to develop a customized biological samples analytic system.

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Illusion induced overlapped optics

Cited by 15 publications

References 46 publications

Illusion Optics: Disguising with Ordinary Dielectric Materials

Illusion Optics: Disguising with Ordinary Dielectric Materials

Inverse design based metamaterial concentrator and its applications and realization

Use of membrane separation device for extraction of intracellular protein and DNA

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