Negative refraction in Möbius molecules

Fang, Yihong; Shen, Yao; Ai, Qing; Sun, C. P.

doi:10.1103/physreva.94.043805

Cited by 17 publications

(30 citation statements)

References 44 publications

(92 reference statements)

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“…Metamaterials with negative refraction [1][2][3][4][5][6][7] have attracted broad interest because of their potential applications, including perfect lenses [2,8], fingerprint identification in forensic science [9], simulating condensed matter phenomena and reversed Doppler effect [10,11], controlling light polarization [12], and electromagnetic cloaking [13][14][15]. In order to realize metamaterials, a number of routes have been proposed, including (molecular) split-ring resonators [3,16,17], chiral approaches [18], hyperbolic dispersion [19][20][21][22], dark-state mechanism [23][24][25][26][27], and topological routes [28][29][30]. However, none of these can effectively overcome the difficulty of realizing broad-band negative refraction.…”

Section: Introductionmentioning

confidence: 99%

“…Since two or more transitions can effectively overlap with each other, it would be reasonable to expect a broadened bandwidth of the negative refraction by simultaneous multi-electron transitions. On the other hand, Möbius molecules with nontrivial topology have been synthesized [39][40][41][42][43] and proposed to realize, e.g., metamaterials [28,30,44], quantum devices [45][46][47], dual-mode resonators and bandpass filters [48], topological insulators [49], molecular knots and engines [50], and artificial light harvesting [51,52].…”

Section: Introductionmentioning

confidence: 99%

“…As a concrete example for demonstrating the above principle, here we consider multi-electron transitions in a double-ring Möbius molecule [30,47] with N 2 π-electrons. Every energy level could be filled with two electrons of different spins, due to Pauli's exclusion principle.…”

Section: Introductionmentioning

confidence: 99%

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Broad-band negative refraction via simultaneous multi-electron transitions

et al. 2019

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The potential applications of metamaterials with negative refraction are limited by their narrow bandwidth and difficulty in fabrication. In order to broaden the bandwidth, we analyze different factors which influence the negative refraction in solids and multi-atom molecules. We find that this negative refraction can be significantly enhanced by simultaneous multi-electron transitions with the same transition frequency and dipole redistribution over different eigenstates. We show that these simultaneous multi-electron transitions and enhanced transition dipole broaden the bandwidth of the negative refraction by at least one order of magnitude. Furthermore, we show the possible application of this scheme in hyperbolic metamaterials using diamonds with NV centers.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Broad-band negative refraction via simultaneous multi-electron transitions

et al. 2019

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“…Figure (6) shows the characteristics of Möbius molecular rings that support negative refraction (-ve permittivity ε andve permeability μ), known as metamaterial properties. As shown in Figure (6), two energy bands are denoted by their different pseudo spin labels  =↑and↓; detuning  =- 0 [7]. The difference between the Möbius molecular ring and the common annulenes lies in the boundary condition.…”

Section: Garphene Möbius Strip: Microwave Componentsmentioning

confidence: 99%

Möbius metamaterial topology: Applications in resonators and tunable oscillator circuits

Poddar

Rohde

2015

2015 Joint Conference of the IEEE International Frequency Control Symposium &Amp; The European Frequency and Time Forum

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Manipulating and tailoring the electromagneticwave coupling properties, numerous interesting properties of topology driven Möbius Metamaterials Strip is emerging that goes beyond the conventional characteristics and structure functionality relationship. The goal of this paper is 3-folds: (i) to address the key concept of topology and topological notions in a wide class of materials with potential technological applications, (ii) discuss the possibility of application of topology driven negative refractive index composite Metamaterial Möbius strips, and (iii) validation examples (4GHz-12GHz/12GHz-18GHz voltage controlled oscillator circuits for RF/MW applications).

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“…1 For this kind of material, the permittivity and permeability can be negative simultaneously in electromagnetic field, which might bring about the phenomenon of negative refraction. Pendry et al [2][3][4][5][6] developed Veselago's theory, their research pointed out that the configuration of split-ring resonators (SRRs) 3 which had non-trivial symmetry breaking 7 is an effective way to realize negative refraction. Negative refraction has became more and more popular these decades, new researches and applications come to practice.…”

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confidence: 99%

Permittivity and permeability of pentagon configuration molecules with different symmetry breaking and their applications

Shen¹,

Chen²

2017

Sci. China Phys. Mech. Astron.

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Some kinds of psychoactive drugs have the structures which are called split-ring resonators (SRRs). SRRs might result in negative permittivity and permeability simultaneously in electromagnetic field. Simultaneous negative indexes can lead to the famous phenomenon of negative refraction. This optical property makes it possible to distinguish synthetic cannabinoids from other abusive psychoactive drugs in the UV-vis region. This optical method is non-damaged and superior in forensic science. In this paper, we use tight-binding model calculating the permittivity and permeability of the main ingredients of synthetic cannabinoids. At the same time, we give two more results of zolpidem and caffeine. Further we discuss the negative refraction of the category of zepam qualitatively.In 1968, Veselago originally introduced the concept of negative index material (NIM) which exhibit unusual optical property. 1 For this kind of material, the permittivity and permeability can be negative simultaneously in electromagnetic field, which might bring about the phenomenon of negative refraction. Pendry et al.2-6 developed Veselago's theory, their research pointed out that the configuration of split-ring resonators (SRRs) 3 which had non-trivial symmetry breaking 7 is an effective way to realize negative refraction. Negative refraction has became more and more popular these decades, new researches and applications come to practice. For instance, the perfect lenses which are made by NIM can focus all Fourier components of image, both their propagating and evanescent waves are amplified, the quality of image and the detection sensitivity are improved. [8][9][10][11][12] After the theoretical derivation, Shelby et al. 13 gave the experimental realization two years later. According to Veselago's theory, molecules with SRRs configurations such as extended metal atom chains (EMACs), have led a fresh direction of physical and chemical research. 14-37 Recently many fabulous works in different fields come forth, such as invisible cloaking, 38-43 liquid crystal magnetic control, 44 anapole moment, 45 detection of latent fingermarks, 46-48 etc. Inspired by these ideas, negative refraction plays more and more important role in forensic science field since it is a non-damaged optical method to test materials. More importantly, a small categories of molecules could show negative respondence to eletromagnetic fields. 49 Utilizing this property, these categories of molecules can be distinguished from others. This is significant to differentiate psychoactive drugs in forensic science. As a matter of fact, according to the theoretical derivation and calculation, we point out that the main ingredients of synthetic cannabinoids, the category of zepam, zolpidem and caffeine show various degree of negative refraction while other psychoactive drugs can not. We discuss the result of synthetic cannabinoids, zolpidem and caffeine quantitatively and the category of zepam qualitatively. This paper is organized as following: In section II, we previousl...

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Negative refraction in Möbius molecules

Cited by 17 publications

References 44 publications

Broad-band negative refraction via simultaneous multi-electron transitions

Broad-band negative refraction via simultaneous multi-electron transitions

Möbius metamaterial topology: Applications in resonators and tunable oscillator circuits

Permittivity and permeability of pentagon configuration molecules with different symmetry breaking and their applications

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Negative refraction in Möbius molecules

Cited by 17 publications

References 44 publications

Broad-band negative refraction via simultaneous multi-electron transitions

Broad-band negative refraction via simultaneous multi-electron transitions

M&#x00F6;bius metamaterial topology: Applications in resonators and tunable oscillator circuits

Permittivity and permeability of pentagon configuration molecules with different symmetry breaking and their applications

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Möbius metamaterial topology: Applications in resonators and tunable oscillator circuits