Epsilon-Near-Zero Mode for Active Optoelectronic Devices

Vassant, Simon; Archambault, Alexandre; Marquier, François; Pardo, Fabrice; Gennser, U.; Cavanna, A.; Pélouard, Jean-Luc; Greffet, Jean‐Jacques

doi:10.1103/physrevlett.109.237401

Cited by 147 publications

(123 citation statements)

References 28 publications

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“…Conversely, other similar studies identify the physical origin of the enhanced extinction in the excitation of leaky modes [27,29]. The latter interpretation is also supported by studies of the excitation of surface phonon polaritons in ENZ slabs [32][33][34][35].…”

Section: Introductionsupporting

confidence: 62%

Polariton excitation in epsilon-near-zero slabs: Transient trapping of slow light

et al. 2013

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We numerically investigate the propagation of a spatially localized and quasi-monochromatic electromagnetic pulse through a slab with Lorentz dielectric response in the epsilon-near-zero regime, where the real part of the permittivity vanishes at the pulse carrier frequency. We show that the pulse is able to excite a set of virtual polariton modes supported by the slab, the excitation undergoing a generally slow damping due to absorption and radiation leakage. Our numerical and analytical approaches indicate that in its transient dynamics the electromagnetic field displays the very same enhancement of the field component perpendicular to the slab, as in the monochromatic regime. The transient trapping is inherently accompanied by a significantly reduced group velocity ensuing from the small dielectric permittivity, thus providing a novel platform for achieving control and manipulation of slow light.

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Section: Introductionsupporting

confidence: 62%

Polariton excitation in epsilon-near-zero slabs: Transient trapping of slow light

et al. 2013

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“…By presenting a modal analysis, we now show that the physical origin of the bulk absorption in metamaterials is due to the excitation of leaky bulk polaritons called Ferrel-Berreman modes [35][36][37]. As a matter of fact, volume charge oscillations at the ENZ of the metal (bulk or volume plasmons) are formed by the bulk metal.…”

Section: The Dispersion Relationsmentioning

confidence: 92%

Tunable surface waves at the interface separating different graphene-dielectric composite hyperbolic metamaterials

Gric

Hess

2017

Opt. Express

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Despite the fact that metal is the most common conducting constituent element in the fabrication of metamaterials, one of the advantages of graphene over metal is that its conductivity can be controlled by the Fermi energy. Here, we theoretically investigate multilayer structures comprising alternating graphene and dielectric layers as a class of hyperbolic metamaterials for THz frequencies based on a general simple model of the graphene and the dielectric layers. By employing a method of matching the tangential components of the electrical and magnetic fields, we derive the relevant dispersion relations and demonstrate that tuning can be achieved by modifying the Fermi energy. Moreover, tunability of the graphene-dielectric heterostructures can be enhanced further by changing either the thickness of the dielectric layers or the number of graphene sheets employed. Calculated dispersion relations, propagation lengths of plasmon modes in the system are presented. This allows us to characterize and categorize the modes into two groups: FerrelBerreman modes and surface plasmon polaritons. 85-90 (1985). 498-512 (1967). 39. A. McAlister and E. Stern, "Plasma resonance absorption in thin metal films," Phys.

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“…Through modal analysis, taking into account the finite unit cell size of the metamaterial, we now show that the physical origin of this bulk absorption in the metamaterials is due to the excitation of leaky bulk polaritons called Ferrell-Berreman modes [23,24]. Bulk metal supports volume charge oscillations at the ENZ of the metal (bulk or volume plasmons).…”

Section: Modal Analysis Of Radiative Bulk Plasmons -Ferrell-berrementioning

confidence: 99%

Ferrell–Berreman Modes in Plasmonic Epsilon-near-Zero Media

et al. 2014

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We observe unique absorption resonances in silver/silica multilayer-based epsilon-near-zero (ENZ) metamaterials that are related to radiative bulk plasmon-polariton states of thin-films originally studied by Ferrell (1958) and Berreman (1963). In the local effective medium, metamaterial description, the unique effect of the excitation of these microscopic modes is counterintuitive and captured within the complex propagation constant, not the effective dielectric permittivities. Theoretical analysis of the band structure for our metamaterials shows the existence of multiple Ferrel-Berreman branches with slow light characteristics. The demonstration that the propagation constant reveals subtle microscopic resonances can lead to the design of devices where Ferrell-Berreman modes can be exploited for practical applications ranging from plasmonic sensing to imaging and absorption enhancement. Keywords: plasmon resonance, epsilon-near-zero, metamaterials, plasmonics An important class of artificial media are the epsilon-near-zero (ENZ) metamaterials that are designed to have a vanishing dielectric permittivity | | → 0. Waves propagating within ENZ media have a divergent phase velocity that can be used to guide light with zero phase advancement through sharp bends within sub-wavelength size channels [1, 2], or to tailor the phase of radiation/luminescence within a prescribed ENZ structure [3,4]. The electric field intensity within an ENZ medium can be enhanced relative to that in free space leading to strong light absorption [5]. This enhanced absorption in ENZ media has been exploited for novel polarization control and filtering in thin films [6], as well the proposal to use ENZ absorption resonances to tune thermal blackbody radiation of a heated object to the band-gap of a photovoltaic cell [7]. An enhanced non-linear response based upon strong spatial dispersion of waves in ENZ media has been demonstrated, and proposed for all-optical switching [8,9].Here we show theoretically and experimentally that ENZ metamaterials support unique absorption resonances related to radiative bulk plasmon-polaritons of thin metal films. These radiative bright modes exhibit properties in stark contrast to conventional dark modes of thin-film media (surface plasmon polaritons). The unique absorption resonances manifested in our metamaterials were originally studied by Ferrell in 1958 for plasmon-polaritonic thinfilms in the ultraviolet [10], and by Berreman in 1963 for phonon-polaritonic thin-films in the mid-infrared spectral region [11]. Surprisingly, two research communities have developed this independently with little communication or overlap until now: we therefore address these resonances as Ferrell-Berreman (FB) modes of our metamaterials. Counterintiutively, in the metamaterial effective medium picture, these resonances are not captured in the metamaterial dielectric permittivity constants but rather in the effective propagation constant. Furthermore, we show the existence of multiple branches of such FB modes that have slow ...

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Epsilon-Near-Zero Mode for Active Optoelectronic Devices

Cited by 147 publications

References 28 publications

Polariton excitation in epsilon-near-zero slabs: Transient trapping of slow light

Polariton excitation in epsilon-near-zero slabs: Transient trapping of slow light

Tunable surface waves at the interface separating different graphene-dielectric composite hyperbolic metamaterials

Ferrell–Berreman Modes in Plasmonic Epsilon-near-Zero Media

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