Directional Fano Resonance in an Individual GaAs Nanospheroid

Ma, Churong; Yan, Jiahao; Huang, Yingcong; Yang, Guowei

doi:10.1002/smll.201900546

Cited by 21 publications

(18 citation statements)

References 48 publications

(54 reference statements)

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“…Fano resonance, a fundamentally interesting feature resulting from the interference between a discrete narrow localized state and the background broadband continuum, exhibits an asymmetric line shape with a high quality factor, which can sustain significantly enhanced modal fields, [ 1–5 ] and enable numerous photonic applications, such as optical switching, [ 6–9 ] sensing, [ 10–15 ] nonreciprocal propagation, [ 16–21 ] modulation, [ 22–26 ] optical logic gates, [ 27–29 ] and light buffering and storage. [ 3,30–35 ]…”

Section: Introductionmentioning

confidence: 99%

Fano Resonance in Artificial Photonic Molecules

Cao

Dong

Zhou

et al. 2020

Advanced Optical Materials

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photonic applications, such as optical switching, [6][7][8][9] sensing, [10][11][12][13][14][15] nonreciprocal propagation, [16][17][18][19][20][21] modulation, [22][23][24][25][26] optical logic gates, [27][28][29] and light buffering and storage. [3,[30][31][32][33][34][35] The Fano line shape profiles are related to the system's structural parameters and the electromagnetic parameters of ambient media. So, various systems, including optical cavities, [36][37][38][39] nanoclusters, [40][41][42][43] photonic crystals, [44][45] gratings, [46][47][48][49] metamaterials, [50][51][52][53] metasurfaces, [54][55][56][57] and many others, [58][59][60][61][62][63] have been proposed theoretically and observed experimentally to exhibit Fano resonance. Inspired by recent progress in numerous novel materials, [64][65][66][67][68][69] including 2D materials with exotic optoelectronic properties, [70][71][72] superconducting materials, [73,74] phase-changed materials, [75,76] low loss dielectric materials [77,78] and quantum dots, [79][80][81][82] many opportunities to investigate Fano resonance are anticipated.It is well-known that the macroscopically arrayed structures are typically too bulky for highly integrated on-chip optical circuits, thus, compact photonic structures are in high demand. [83][84][85] Optical microcavities, with high quality (high-Q) factors, convenient all-optical control, and compatibility with on-chip fabrication, have been used extensively for sophisticated optical devices, such as isolators, [86] lasers, [87] circuits, [88] sensors, [89][90][91] and buffers, [92,93] with distinctive properties. Based on the similarities between the classical electromagnetism and quantum mechanics, a single cavity and coupled-cavity can be referred to as artificial photonic atom and photonic molecule, [94][95][96] respectively. Analogous to the single atom molecule, a single cavity can also be referred to as a photonic molecule. The spectral response arising from the coherent interaction of optical modes depends heavily on the configuration of the artificial photonic molecules. [97][98][99] Over the years, sorts of photonic molecules have been implemented as key building blocks for realizing Fano resonance, [83,85,[88][89][90][91]100,101] thanks to the interactions between optical modes as illustrated in Figure 1a. The Fano profiles have been both experimentally and theoretically studied with numerous interesting physical phenomena revealed by the coupled oscillator model, [83,86,102] temporal coupled-mode theory, [103][104][105][106][107] transfer matrix method, [108][109][110] and quantumoptics approach. [111,112] In this work, we focus on reviewing the Fano resonance in artificial photonic molecules. We first introduce the properties of Fano resonance. Specifically, we discussThe spectral signatures of chemical molecules are dependent on the hybridization of electronic states. The artificial photonic molecules formed by structured optical microcavities, exhibiting Fano features with sharp asymmetric line shape a...

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Section: Introductionmentioning

confidence: 99%

Fano Resonance in Artificial Photonic Molecules

Cao

Dong

Zhou

et al. 2020

Advanced Optical Materials

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“…The unidirectionality can be also enhanced with several elements in order to realize a downscaling of the classic RF Yagi-Uda antenna [ 21,38,39 ] or other array configurations [ 38,40,41 ]. Another approach exploits the near field interference of multiple resonances (e.g., electric and magnetic) simultaneously excited in the same antenna element [ 26,[42][43][44] ]. Plasmonic nanoantennas can be engineered to achieve unidirectionality by resorting to specific antenna geometries [ 45,46 ], e.g.…”

Section: Introductionmentioning

confidence: 99%

“… 38 , 40 , 41 Another approach exploits the near-field interference of multiple resonances (e.g., electric and magnetic) simultaneously excited in the same antenna element. 26 , 42 − 44 Plasmonic nanoantennas can be engineered to achieve unidirectionality by resorting to specific antenna geometries, 45 , 46 e.g., gold split-ring resonators 47 or even nanodisk antennas, 48 but generally only dielectric and hybrid metal/dielectric antennas are suited for color routing due to the strength and phase shifts of magnetic modes in dielectric materials. 26 , 49 The third approach is based upon wavefront manipulation by highly ordered metasurfaces, with meta-atoms made of either single or multielement nanoantennas, providing either wavelength-independent unidirectional scattering, 50 or wavelength selective narrow-band bidirectional color routing operation.…”

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confidence: 99%

Color Routing via Cross-Polarized Detuned Plasmonic Nanoantennas in Large-Area Metasurfaces

et al. 2020

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Bidirectional nanoantennas are of key relevance for advanced functionalities to be implemented at the nanoscale and, in particular, for color routing in an ultracompact flat-optics configuration. Here we demonstrate a novel approach avoiding complex collective geometries and/or restrictive morphological parameters based on cross-polarized detuned plasmonic nanoantennas in a uniaxial (quasi-1D) bimetallic configuration. The nanofabrication of such a flat-optics system is controlled over a large area (cm 2 ) by a novel self-organized technique exploiting ion-induced nanoscale wrinkling instability on glass templates to engineer tilted bimetallic nanostrip dimers. These nanoantennas feature broadband color routing with superior light scattering directivity figures, which are well described by numerical simulations and turn out to be competitive with the response of lithographic nanoantennas. These results demonstrate that our large-area self-organized metasurfaces can be implemented in real-world applications of flat-optics color routing from telecom photonics to optical nanosensing.

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“…In particular, the resonant dielectric nanostructures with high refractive index have simultaneously both Mie type electric and magnetic resonances, [14] which can be tuned by their shape. [15][16][17][18] Additionally, dielectric nanostructures confine the electromagnetic field inside their volume rather than around their surfaces, as opposed to plasmonics, which leads to an increased light matter-interaction between the incident wave and the dielectric material and a reduced impact of surface roughness on the nonlinear optical emission. The electric confinement in the volume of dielectric nanostructures is used to enhance the nonlinear optical conversion at the nanoscale.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Nonlinear Yield from Barium Titanate Metasurface Down to the Near Ultraviolet

Timpu

Escalé

Timofeeva

et al. 2019

Advanced Optical Materials

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Metasurfaces are artificial nanopatterned two-dimensional architectures that can offer a solution to the bottleneck problem of bulky optical elements. They have the ability of wavefront shaping and light sub-wavelength manipulation because they are formed of resonantly scattering elements. Recently, the properties of metasurfaces gained interest for nonlinear optics in the efforts to miniaturize nonlinear optical devices while maintaining high photon-photon interactions. Here we develop a new type of nonlinear metasurface based on the metal oxide barium titanate, which demonstrates an efficient nonlinear optical response over a broad spectral range, from near-ultraviolet to the visible range, where metals and semiconductors typically have losses. Contrary to previously demonstrated nonlinear plasmonic metasurfaces, these dielectric metasurfaces are less sensitive to surface roughness and gain their optical nonlinearity from the noncentrosymmetric crystal structure of the ferroelectric barium titanate.

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Directional Fano Resonance in an Individual GaAs Nanospheroid

Cited by 21 publications

References 48 publications

Fano Resonance in Artificial Photonic Molecules

Fano Resonance in Artificial Photonic Molecules

Color Routing via Cross-Polarized Detuned Plasmonic Nanoantennas in Large-Area Metasurfaces

Enhanced Nonlinear Yield from Barium Titanate Metasurface Down to the Near Ultraviolet

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