Reverse surface-polariton cherenkov radiation

Tao, Jin; Wang, Qi Jie; Zhang, Jingjing; Luo, Yu

doi:10.1038/srep30704

Cited by 31 publications

(21 citation statements)

References 21 publications

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“…A decade later, Veselago 1 predicted that materials with negative refractive index should demonstrate backward Cherenkov radiation. During the recent wave of research into the negative index and other metamaterials the backward (reversed) Cherenkov radiation and its close analogues were observed experimentally 2 , 3 and extensively studied theoretically, see, e.g., refs 4 – 6 . Backward Cherenkov radiation was also predicted to occur in photonic crystals 7 and in the quantum analysis of this renowned effect 8 .…”

Section: Introductionmentioning

confidence: 99%

Backward Cherenkov radiation emitted by polariton solitons in a microcavity wire

et al. 2017

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Exciton-polaritons in semiconductor microcavities form a highly nonlinear platform to study a variety of effects interfacing optical, condensed matter, quantum and statistical physics. We show that the complex polariton patterns generated by picosecond pulses in microcavity wire waveguides can be understood as the Cherenkov radiation emitted by bright polariton solitons, which is enabled by the unique microcavity polariton dispersion, which has momentum intervals with positive and negative group velocities. Unlike in optical fibres and semiconductor waveguides, we observe that the microcavity wire Cherenkov radiation is predominantly emitted with negative group velocity and therefore propagates backwards relative to the propagation direction of the emitting soliton. We have developed a theory of the microcavity wire polariton solitons and of their Cherenkov radiation and conducted a series of experiments, where we have measured polariton-soliton pulse compression, pulse breaking and emission of the backward Cherenkov radiation.

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Section: Introductionmentioning

confidence: 99%

Backward Cherenkov radiation emitted by polariton solitons in a microcavity wire

et al. 2017

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“…Potential applications of this selective cone formation lie in velocity-sensitive Cerenkov detectors and CL generation at selectable frequencies. Of potential use in particle detectors, it was recently shown that photonic crystals can slow down the propagation of CL appreciably and further control the behaviour of CL 88,89 . In both metamaterial and photonic crystal examples, CL can be modulated to disobey theories that were assumed fundamental to light generation.…”

Section: Metamaterials and Photonic Crystalsmentioning

confidence: 99%

Utilizing the power of Cerenkov light with nanotechnology

2017

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The characteristic blue glow of Cerenkov luminescence (CL) arises from the interaction between a charged particle travelling faster than the phase velocity of light and a dielectric medium, such as water or tissue. As CL emanates from a variety of sources, such as cosmic events, particle accelerators, nuclear reactors and clinical radionuclides, it has been used in applications such as particle detection, dosimetry, and medical imaging and therapy. The combination of CL and nanoparticles for biomedicine has improved diagnosis and therapy, especially in oncological research. Although radioactive decay itself cannot be easily modulated, the associated CL can be through the use of nanoparticles, thus offering new applications in biomedical research. Advances in nanoparticles, metamaterials and photonic crystals have also yielded new behaviours of CL. Here, we review the physics behind Cerenkov luminescence and associated applications in biomedicine. We also show that by combining advances in nanotechnology and materials science with CL, new avenues for basic and applied sciences have opened.

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“…Recently, a wealth of artificial structures including plasmonic waveguides and hyperbolic metamaterials are investigated to reduce the Cherenkov threshold. [ 28–34 ] With a proper design, effective refractive indices of eigenmodes in these structures go to infinity (i.e.,

n \to \infty

) under the classical local approximation. Consequently, Cherenkov radiation can be made threshold‐free under the local approximation, i.e.,

v_{normalth} = c / n \to 0

.…”

Section: Introductionmentioning

confidence: 99%

Nonlocality Induced Cherenkov Threshold

Lin

Zhang

et al. 2020

Laser & Photonics Reviews

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Cherenkov radiation is generally believed to be threshold-free in hyperbolic metamaterials owing to the extremely large photonic density of states in classical local framework. Although recent advances in nonlocal and quantum plasmonics extend our understanding of light-matter interactions in metamaterials, how such effects influence Cherenkov radiation in hyperbolic metamaterials still remains unknown. Here, it is demonstrated that effects of nonlocality add a new degree of freedom to engineer Cherenkov thresholds in hyperbolic metamaterials. The interplay between finite structural dimensions and nonlocal nature of metallic electrons results in a nonzero Cherenkov threshold. Counterintuitively, such nonlocality-induced Cherenkov threshold can be significantly smaller than the classically predicted one if the metamaterial is designed to work around the epsilon-near-zero frequency. This phenomenon is attributed to the excitation of longitudinal plasmon modes which are absent in classical electromagnetic framework. These findings apply to a general class of hyperbolic materials, including metallodielectric layered structures, nanorod/nanoribbon arrays, hyperbolic van der Waals crystals, etc.

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Reverse surface-polariton cherenkov radiation

Cited by 31 publications

References 21 publications

Backward Cherenkov radiation emitted by polariton solitons in a microcavity wire

Backward Cherenkov radiation emitted by polariton solitons in a microcavity wire

Utilizing the power of Cerenkov light with nanotechnology

Nonlocality Induced Cherenkov Threshold

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