Coherent emission of light using stacked gratings

Gong, Yongkang; Liu, Xianliang; Li, Kang; Huang, Jianghua; Martínez, J. J.; Rees-Whippey, Daniel; Carver, Sara; Wang, Leiran; Zhang, Wenfu; Duan, Tao; Copner, Nigel

doi:10.1103/physrevb.87.205121

Cited by 42 publications

(19 citation statements)

References 25 publications

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“…Many equivalent-circuit proposals found in the literature do not give analytical expressions for the lumped elements, but instead their values are usually extracted from intensive external full-wave simulations. In other instances [17,22,[31][32][33][34] some analytical formulas are provided, but they have a limited range of applications that typically does not extend beyond the onset of the first grating lobe (diffraction regime) or are valid only in the subwavelength regime. Further extension into the diffraction regime requires more sophisticated models, usually requiring that some of the circuit parameters are frequency dependent.…”

Section: Introductionmentioning

confidence: 99%

Wideband analytical equivalent circuit for one-dimensional periodic stacked arrays

et al. 2016

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A wideband equivalent circuit is proposed for the accurate analysis of scattering from a set of stacked slit gratings illuminated by a plane wave with transverse magnetic or electric polarization that impinges normally or obliquely along one of the principal planes of the structure. The slit gratings are printed on dielectric slabs of arbitrary thickness, including the case of closely spaced gratings that interact by higher-order modes. A Π-circuit topology is obtained for a pair of coupled arrays, with fully analytical expressions for all the circuit elements. This equivalent Π circuit is employed as the basis to derive the equivalent circuit of finite stacks with any given number of gratings. Analytical expressions for the Brillouin diagram and the Bloch impedance are also obtained for infinite periodic stacks.

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Section: Introductionmentioning

confidence: 99%

Wideband analytical equivalent circuit for one-dimensional periodic stacked arrays

et al. 2016

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“…In some cases, plasmon resonances do not follow Lorentz peak shape [32,44]. A relative intensity change I /I at a fixed frequency induced by a small refractive index change n can be detected in the practical ways.…”

Section: Sensing Propertiesmentioning

confidence: 98%

“…The electric field is bound to the metal-dielectric interface and decays exponentially from the interface into neighboring media [15,32]. A change of the surrounding refractive index causes a wavelength shift of the localized plasmon resonance [13].…”

Section: Sensing Propertiesmentioning

confidence: 99%

“…The adjustable geometric parameters include gold ring height t, period of gold rings along x direction p x , period along y direction p y , dielectric layer thickness h, gold plate thickness L, inner diameter of ring d, outer diameter of ring D, and thickness of nanoring wall t wall . In the following calculations, we consider a square lattice structure for simplicity, so p x and p y both equal p. The permittivity of gold in the infrared regime is described by the Drude model [23,[29][30][31][32],…”

Section: Theoretical Model and Structuresmentioning

confidence: 99%

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High-sensitivity plasmonic sensor based on perfect absorber with metallic nanoring structures

Lü

Wan

Liu

et al. 2015

Journal of Modern Optics

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2015): High-sensitivity plasmonic sensor based on perfect absorber with metallic nanoring structures, Journal of Modern Optics,We propose a nanoring array structure backed by a metal mirror to achieve perfect infrared absorber with absorption as high as 99.99%. The frequency of the absorption peak strongly depends on the refractive index surrounding the structured surface, while the maximum of absorption remains constant with varying the surrounding refractive index. These features can be used as plasmonic sensor for refractive index measurement. This plasmonic sensor possesses the figure of merit 700. In addition, we investigate the effect of various materials on the performance of the sensor, including SiO 2 , TiO 2 , TiN, and Al 2 O 3 dielectric spacer and Au, Ag, Al, and Cu back plate and top structure. Due to the high sensitivity and simple sensing scheme, the sensing strategy can find potential applications in chemical and biosensor applications. IntroductionMetallic nanoparticles have been utilized in many fascinating applications based on localized surface plasmon resonance (LSPR), such as surface-enhanced spectroscopy [1,2], detection of biomolecules [3,4], and near-field scanning optical microscopy [5]. This resonance depends strongly on the size and shape of the nanoparticles [6-9], as well as the surrounding dielectric medium [4,10]. Therefore, we can evaluate refractive sensing through the resonance shift due to the variation of the refractive index of surrounding medium. So far, various plasmonic nanostructures have been investigated for sensing a special change of refractive index [12][13][14][15]. These structures include nanospheres [16], nanorods [17], nanoshells [18], nanorice [19], nanostars [2,20], nanorings [21], and so on. Specific physical mechanisms have been also employed to explore more complex plasmonic sensors, such as electromagnetically induced transparency [22].In practical applications, intensity variation of the reflected or transmitted light is measured at a certain wavelength. Sharp peak with large modulation depth is key to obtain a high sensitivity for the LSPR sensor. To enhance the sensitivities of localized plasmon sensors, several structures have been proposed. Ameling et al. utilized the combination of localized plasmons in nanostructures and a photonic microcavity [13]. Liu et al. demonstrated a metal-dielectric-metal structure including metasurface and metallic mirror [23]. Tao et al. designed an ultrathin structure characterized by split-ring resonator-based planar

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“…Some approaches to TP-SPP coupling via structuring the metal have been proposed. [13][14][15] However, this has only been realised within the THz regime 16 or using complex implementations. 17 In this paper, we present a relatively simple TP-SPP coupling structure suitable for the visible to near-infrared spectral range.…”

mentioning

confidence: 99%

Efficient out-coupling and beaming of Tamm optical states via surface plasmon polariton excitation

López‐García

Taverne

et al. 2014

Applied Physics Letters

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We present evidence of optical Tamm states to surface plasmon polariton (SPP) coupling. We experimentally demonstrate that for a Bragg stack with a thin metal layer on the surface, hybrid Tamm-SPP modes may be excited when a grating on the air-metal interface is introduced. Out-coupling via the grating to free space propagation is shown to enhance the transmission as well as the directionality and polarization selection for the transmitted beam. We suggest that this system will be useful on those devices, where a metallic electrical contact as well as beaming and polarization control is needed. V

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Coherent emission of light using stacked gratings

Cited by 42 publications

References 25 publications

Wideband analytical equivalent circuit for one-dimensional periodic stacked arrays

Wideband analytical equivalent circuit for one-dimensional periodic stacked arrays

High-sensitivity plasmonic sensor based on perfect absorber with metallic nanoring structures

Efficient out-coupling and beaming of Tamm optical states via surface plasmon polariton excitation

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