Photonics of time modulated media
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Variations in material properties in space as well as time offer new design possibilities and physical effects. For instance, we have shown that modulated metamaterials exhibit the Fresnel drag effect of light, dictated by special relativity and characteristic of moving media. On the other hand, luminal space-time modulations yield a generalization of the parametric amplifier, enabling broadband and non-reciprocal amplification. |
P.A. Huidobro, E. Galiffi, S. Guenneau, R.V. Craster, and J.B. Pendry , “Fresnel drag in space-time modulated metamaterials”, Proceedings of the National Academy of Sciences arXiv:1908.05883 (2019)
E. Galiffi, P.A. Huidobro and J. B. Pendry, “Broadband Nonreciprocal Amplification in Luminal Metamaterials”, Physical Review Letters, 123, 206101 (2019) arXiv:1907.08421
For a review, see:
“Photonics of time varying media”, Emanuele Galiffi, Romain Tirole, Shixiong Yin, Huanan Lia, Stefano Vezzoli, Paloma A. Huidobro, Mario G. Silveirinha, Riccardo Sapienza, Andrea Alu, and J.B. Pendry, Advanced Photonics, 4(1), 014002 (2022) arXiv:2111.08640v1
Quantum emitter arrays
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María Blanco de Paz and Paloma A. Huidobro “Bound states in the continuum in subwavelength emitter arrays”, Physical Review Research 5, 033108 (2023). Link. PDF. arXiv:2301.08804 María Blanco de Paz, Alejandro González-Tudela and Paloma Arroyo Huidobro “Manipulating generalized Dirac cones in quantum metasurfaces” Physical Review A, 106, 033505 (2022). Link.arXiv:2203.11195
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Topological Nanophotonics
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Topological edge modes in plasmonics
The combination of plasmonics and topological protection can yield robust light modes confined at subwavelength scales: M. Proctor, R.V. Craster, S.A. Maier, V. Giannini, and P.A. Huidobro, “Exciting Pseudospin Dependent Edge States in Plasmonic Metasurfaces”, ACS Photonics, 6 (11), 2985-2995 (2019) arXiv:1908.05614 Topological photonics Photonics gives plenty of degrees of freedom to explore topological physics. For instance, it gives access to experimentally realizable topological “particles” which host quantized topological edge modes. |
For a review on topological nanophotonics, see:
M.S. Rider, S.J. Palmer, S.R. Pocock, X. Xiao, P.A. Huidobro and V. Giannini, “A perspective on topological nanophotonics: current status and future challenges”, J. Appl. Phys. 125, 120901 (2019). arXiv:1812.08679
Transformation Optics
Transformation Optics is a theoretical tool that yields the required electromagnetic parameters that a metamaterial should have given a desired functionality, or, alternatively, allows for the analytical study of plasmonic nanostructures and metasurfaces.
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Graphene Plasmonic Metasurfaces Periodically doped graphene can host surface plasmon excitations which enable very large absorption cross sections even for this atomically-thin materal. The optical response of these metasurfaces can be analytically modelled with Transformation Optics: P.A. Huidobro, M. Kraft, R. Kun, S.A. Maier and J.B. Pendry, “Graphene, plasmons and transformation optics”, Journal of Optics 18, 044024 (2016). arXiv:1602.06812Singular metasurfaces Plasmonic surfaces with periodic singularities in the form of sharp edges, touching points or suppressed conductivity possess broadband optical spectra as opposed to conventional metasurfaces which are narrowband. Transformation Optics gives an understanding of these effects in terms of a hidden dimension, see: J.B. Pendry, P.A. Huidobro, Y. Luo and E. Galiffi, “Compacted dimensions and singular plasmonic metasurfaces”, Science 358(6365), 915-917 (2017). E. Galiffi, J. B. Pendry and P.A. Huidobro, “Broadband THz absorption with singular graphene metasurfaces”, ACS Nano 12 (2), 1006-1013 (2018). arXiv:1810.10467 |
For a review, see:
P.A. Huidobro and A.I. Fernández-Domínguez, “Transformation Optics for Plasmonics: from Metasurfaces to Excitonic Strong Coupling”, arXiv:1907.13546 (2019)
Plasmonics
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Light interacting with metal nanostructures can drive the conduction electrons to oscillate forming a surface plasmon polariton which propagates along metal surfaces or is localized on a nanoparticle. This enables the confinement of light at subwavelength volumes, beyond the diffraction limit, where it can be manipulated or interact with emitters such as molecules or quantum dots. Some of my research highlights are: |
Plamonics
P. A. Huidobro, M. L. Nesterov, L. Martín-Moreno, and F.J. García-Vidal. “Transformation optics for plasmonics,” Nano Letters, 10(6), 1985-90 (2010). arxiv.org/abs/1003.1154
P.A. Huidobro, S. Ota, X. Yang, X. Yin, F.J. García-Vidal and X. Zhang. “Plasmonic Brownian Ratchet,” Physical Review B (Rapid Communications) 88(20) 201401(R) (2013). arXiv:1401.6194
Quantum plasmonics
A. González-Tudela, P.A. Huidobro, L. Martín-Moreno, C. Tejedor and F.J. García-Vidal. “Theory of Strong Coupling between Quantum Emitters and Propagating Surface Plasmons,” Physical Review Letters, 110(12), 126801 (2013). arXiv:1205.3938
Graphene plasmonics
P.A. Huidobro, A.Y. Nikitin, C. González-Ballestero, L. Martín-Moreno, and F.J. García-Vidal. “Superradiance mediated by graphene surface plasmons,” Physical Review B, 85(15), 155438 (2012). arXiv:1201.6492
Plasmonic metamaterials
Metamaterials are composite materials whose electromagnetic properties are determined by their artificial structuring rather than by their chemical composition. As such, they enable optical properties that cannot be found in naturally occurring materials, such as negative refraction or perfect lensing. Some of my interests and research highlights in this area include spoof plasmons. Spoof plasmons mimick the optical properties of surface plasmons but at lower frequencies. They enable for instance surface plasmons with magnetic properties. See e.g.,
P.A. Huidobro, X. Shen, J. Cuerda, E. Moreno, L. Martín-Moreno, F.J. García-Vidal, T.J. Cui and J.B. Pendry. “Magnetic Localized Surface Plasmons,” Physical Review X, 4, 021003 (2014).
