Active tuning of surface phonon polariton resonances via carrier photoinjection

Dunkelberger, Adam D.; Ellis, Chase T.; Ratchford, Daniel; Giles, Alexander J.; Kim, Mijin; Kim, Chul Soo; Spann, Bryan T.; Vurgaftman, I.; Tischler, Joseph G.; Long, James P.; Glembocki, O. J.; Caldwell, Joshua D.

doi:10.1038/s41566-017-0069-0

Cited by 117 publications

(131 citation statements)

References 64 publications

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“…In this regard, plasmonic systems provide rich opportunities for manipulation of light on the nanoscale [1][2][3] . Recently, an alternative approach utilizing polar dielectrics operating in the mid-infrared (mid-IR) spectral range has attracted considerable attention [4][5][6][7][8][9][10][11][12][13][14] . The photonic modes of these systems, termed surface phonon-polaritons, exhibit low optical losses due to their relatively large phonon lifetimes, allowing for higher degrees of energy concentration and smaller Purcell factors than their plasmonic counterparts 15 .…”

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confidence: 99%

Second harmonic generation from strongly coupled localized and propagating phonon-polariton modes

et al. 2018

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We experimentally investigate second harmonic generation from strongly coupled localized and propagative phonon polariton modes in arrays of silicon carbide nanopillars. Our results clearly demonstrate the hybrid nature of the system's eigenmodes and distinct manifestation of strong coupling in the linear and nonlinear response. While in linear reflectivity the intensity of the two strongly-coupled branches is essentially symmetric and well explained by their respective localized or propagative components, the second harmonic signal presents a strong asymmetry. Analyzing it in detail, we reveal the importance of interference effects between the nonlinear polarization terms originating in the bulk and in the phonon polariton modes, respectively.

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confidence: 99%

Second harmonic generation from strongly coupled localized and propagating phonon-polariton modes

et al. 2018

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“…The large permittivity near the TO phonon of 3C‐SiC enables metasurfaces with deep subwavelength periods, providing more consistent performance with varying angle of incidence in a nanoscale unit cell that is not possible with Mie resonances in nonresonant materials at such long free‐space wavelengths. This compares favorably with work involving SiC emitters utilizing surface phonon polariton modes within the Restrahlen band . Our design utilizes a simple architecture that allows for operation at normal incidence and maintains high emissivity and narrow linewidths throughout a wide range of viewing angles.…”

Section: Discussionmentioning

confidence: 96%

“…Dielectric metasurfaces have been demonstrated for control of both the amplitude and phase of light, enabling a variety of flat optics including reflectors, narrowband filters, ultrathin waveplates, lenses, and holograms . Additionally, several techniques to actively modulate such metasurfaces have been studied . At optical frequencies, previous dielectric metasurfaces have employed materials, such as silicon that have a relatively low‐permittivity (ε≅12) with minimal dispersion, thus limiting the implementation of nanoscale resonators to the visible spectral range.…”

Section: Introductionmentioning

confidence: 99%

Near‐Unity and Narrowband Thermal Emissivity in Balanced Dielectric Metasurfaces

Howes

Nolen

Caldwell

et al. 2019

Advanced Optical Materials

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Nanostructured materials have provided new freedoms for tailoring thermal emissivity in an ultracompact footprint. However, while many designs have demonstrated large absorption amplitude, this often comes at the expense of angular dispersion or the need for a reflective backplane. Furthermore, metal‐based designs generally have broad linewidths due to large nonradiative damping. Here, a unique approach is outlined for obtaining narrowband near‐unity thermal emissivity through spectrally overlapping two orthogonal lossy Mie‐type modes in dielectric metasurfaces operating in the long‐wave infrared. Operating near the transverse optic phonon frequency of a polar dielectric provides a suitably lossy environment, but also one featuring extremely large permittivity, enabling deeply subwavelength resonator sizes, insensitivity to the angle of incidence, and large quality factors even while operating in the long‐wave infrared. Balancing the oscillator strengths and optical losses of the two overlapped resonances maximizes the absorption, resulting in a 3C‐SiC metasurface with 78% absorptance and a quality factor of 170. This balanced metasurface possesses a quality factor on par with some of the narrowest band thermal emitters in the long‐wave infrared, while possessing a simple architecture and prospects for unity emissivity.

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“…3(d)) [37]. The chemical potential of graphene is modulated by an applied electric field and the topological transition of dispersion is realized with the changed chemical potential [24][25][26][27][28][29][30][31][32]. This actively controlled topological transition will greatly change the emission pattern of a source in the medium.…”

Section: Graphene/dielectric Multilayersmentioning

confidence: 99%

“…In contrast to the passive metamaterials, the study of actively tuned metamaterials and meta-devices is also an outstanding research topic [24][25][26][27]. Actively controlled metamaterial systems have been predicted to be able to yield new applications ranging from electrically switchable devices [26] to the tunable coupling devices [25,27]. The realization of the actively tunable topological transition of IFC is also very useful in the design of new active optical devices.…”

Section: Introductionmentioning

confidence: 99%

Actively Controlling the Topological Transition of Dispersion Based on Electrically Controllable Metamaterials

et al. 2018

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Topological transition of the iso-frequency contour (IFC) from a closed ellipsoid to an open hyperboloid, will provide unique capabilities for controlling the propagation of light. However, the ability to actively tune these effects remains elusive and the related experimental observations are highly desirable. Here, tunable electric IFC in periodic structure which is composed of graphene/dielectric multilayers is investigated by tuning the chemical potential of graphene layer.Specially, we present the actively controlled transportation in two kinds of anisotropic zero-index media containing PEC/PMC impurities. At last, by adding variable capacitance diodes into two-dimensional transmission-line system, we present the experimental demonstration of the actively controlled magnetic topological transition of dispersion based on electrically controllable metamaterials. With the increase of voltage, we measure the different emission patterns from a point source inside the structure and observe the phase-transition process of IFCs. The realization of actively tuned topological transition will opens up a new avenue in the dynamical control of metamaterials.

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Active tuning of surface phonon polariton resonances via carrier photoinjection

Cited by 117 publications

References 64 publications

Second harmonic generation from strongly coupled localized and propagating phonon-polariton modes

Second harmonic generation from strongly coupled localized and propagating phonon-polariton modes

Near‐Unity and Narrowband Thermal Emissivity in Balanced Dielectric Metasurfaces

Actively Controlling the Topological Transition of Dispersion Based on Electrically Controllable Metamaterials

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