Atomic Response in the Near-Field of Nanostructured Plasmonic Metamaterial

Aljunid, S. A.; Chan, Eng Aik; Adamo, Giorgio; Ducloy, M.; Wilkowski, David; Zheludev, Nikolay I.

doi:10.1021/acs.nanolett.6b00446

Cited by 42 publications

(45 citation statements)

References 36 publications

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“…The system under investigation, similar to the one used by Aljunid et al [24], is depicted in Fig.1a. A Cesium vapor at T=80 o C is introduced into a vacuum chamber.…”

Section: Resultsmentioning

confidence: 99%

Tailoring optical metamaterials to tune the atom-surface Casimir-Polder interaction

et al. 2018

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“…The system under investigation, similar to the one used by Aljunid et al [24], is depicted in Fig.1a. A Cesium vapor at T=80 o C is introduced into a vacuum chamber.…”

Section: Resultsmentioning

confidence: 99%

Tailoring optical metamaterials to tune the atom-surface Casimir-Polder interaction

et al. 2018

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“…Controlling light at the nanoscale is significant for photonic devices and their integration on optical chips. Metallic plasmonic structures provide a way to manipulate the optical field at the nanoscale through localized surface plasmon resonance, and they are widely used in surface enhanced Raman scattering, biological sensing, photovoltaic devices, and metamaterials . However, they are still imperfect due to some disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Directional Scattering in a Germanium Nanosphere in the Visible Light Region

Yan

Huang

et al. 2017

Advanced Optical Materials

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Recently, all-dielectric materials (ADMs), especially with a high value of the refractive index, are emerging as a promising alternative to plasmonic nanostructures for nanophotonics applications. [9][10][11] Comparing to metallic plasmonic nanostructures, ADMs are superior in low-loss, ultralow light-into-heat conversion [12] and the excitation of both electric and strong magnetic resonances. [13] As a basic building block, high-index ADMs such as silicon [14][15][16][17] (Si), gallium arsenide [18] (GaAs), aluminum gallium arsenide [19] (AlGaAs), and so on have attracted more and more attentions. Among them, Si is the most widely studied one because of its abundance and mature processing technology. Directional infrared and visible light scattering by individual nanoparticles have been first experimentally demonstrated by Geffrin et al. [20] and Fu et al. [15] for Si and by Person et al. [18] for GaAs. At a certain wavelength, the forward-to-backward scattering ratio reaches above six for an individual Si nanoparticle. [15] However, at the peak of scattering cross-section spectrum, the directionality decreases greatly and becomes inefficient. Further, Yan et al. [21] observed the directional Fano resonance in Si nanoparticle dimers in the experiments. The forward-to-backward scattering ratio can be ≈64 at the scattering peak relying on the directional Fano resonance. Besides, magnetically induced forward scattering at visible wavelengths in silicon nanoparticle oligomers has also been demonstrated. [22] Other linear and nonlinear optical properties of Si nanoparticles have been studied in detail by Kivshar and co-workers. [23][24][25] On the contrary, Ge with one of the highest refractive indices has not gotten enough attention, especially in the visible region. Comparing with Si, Ge has a smaller bandgap (E g, Ge = 0.66 eV, E g, Si = 1.12 eV) and higher hole and electron mobilities (4.2 and 2.6 times of Si, respectively). [26] Thus, it is widely used for high-performance photodetection and transistor. In addition, the excitonic Bohr radius of Ge (24.3 nm) is larger than that of Si (4.9 nm), which results in more prominent quantum confinement effects. In optics, Ge has stronger light absorption in the visible region and can be used as a photothermal material by virtue of its higher refractive index and extinction coefficient than silicon. [27] Moreover, the thirdorder nonlinear optical coefficient of Ge is one order of magnitude greater than Si, which makes it more efficient in nonlinear optics. [28] The electric and magnetic dipolar responses of Previous designs of photonic nanoantennas are based on noble metal plasmonic structures, suffering from large ohmic loss and only possessing dipolar plasmon modes. This has driven the intense search for all-dielectric materials (ADMs) beyond noble metals. Here, for the first time, a strong scattering anisotropy in a Ge nanosphere is demonstrated in the visible and nearinfrared regions. The forward-to-backward scattering ratio for an individual Ge nanosphere (150 nm) ca...

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“…One important feature of these spectra is the inversion of the dispersion-like shape upon transition from bare fiber to metasurface fiber. Such effect has been previously observed using a free-space optical setup probing on atomic gases hybridized with highly confined plasmons (Aljunid et al, 2016;L. Stern, Grajower, & Levy, 2014).…”

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confidence: 53%

Plasmono-Atomic Interactions at the Fiber Tip

Chan

Adamo

Aljunid

et al. 2018

CLEO Pacific Rim Conference

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We show that optical fiber sensor bearing plasmonic metamaterial at its tip can be used to detect modifications of the Doppler-free hyperfine atomic spectra induced by coupling between atomic and plasmonic excitations. We observed the inversion of the phase modulation reflectivity spectra of Cesium vapor in presence of the metamaterial. This work paves the way for new compact hybrid atomic systems with a cleaved tip as substrate platform to host various two-dimensional materials.

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Atomic Response in the Near-Field of Nanostructured Plasmonic Metamaterial

Cited by 42 publications

References 36 publications

Tailoring optical metamaterials to tune the atom-surface Casimir-Polder interaction

Tailoring optical metamaterials to tune the atom-surface Casimir-Polder interaction

Directional Scattering in a Germanium Nanosphere in the Visible Light Region

Plasmono-Atomic Interactions at the Fiber Tip

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