Gigahertz Frame Rate Imaging of Charge-Injection Dynamics in a Molecular Light Source

2022-04-05T17:41:05+02:00Tags: , , , , , |

Authors: Roslawska, Anna; Merino, Pablo; Leon, Christopher C.; Grewal, Abhishek; Etzkorn, Markus; Kuhnke, Klaus; Kern, Klaus Journal: NANO LETTERS Publication date: 2021/06/09 DOI: 10.1021/acs.nanolett.1c00328 Abstract: Light sources on the scale of single molecules can be addressed and characterized at their proper sub-nanometer scale by scanning tunneling microscopy-induced luminescence (STML). Such a source can be driven [...]

Atomic-Scale Structural Fluctuations of a Plasmonic Cavity

2022-04-05T17:40:59+02:00Tags: , , , , , |

Authors: Roslawska, Anna; Merino, Pablo; Grewal, Abhishek; Leon, Christopher C.; Kuhnke, Klaus; Kern, Klaus Journal: NANO LETTERS Publication date: 2021/09/08 DOI: 10.1021/acs.nanolett.1c02207 Abstract: Optical spectromicroscopies, which can reach atomic resolution due to plasmonic enhancement, are perturbed by spontaneous intensity modifications. Here, we study such fluctuations in plasmonic electroluminescence at the single-atom limit profiting from the [...]

Spin Many-Body Phases in Standard- and Topological-Waveguide QED Simulators

2022-03-07T20:22:00+01:00Tags: , , |

Authors: Bello, M.; Platero, G.; Gonzalez-Tudela, A. Journal: PRX QUANTUM Publication date: 2022/03/07 DOI: 10.1103/PRXQuantum.3.010336 Abstract: Waveguide QED has emerged as a powerful analog quantum simulator due to the possibility of mediating versatile spin-spin interactions with tunable sign, range, and even dimerization. Yet, despite their potential, the many-body phases emerging from these systems have only [...]

Photon-Mediated Interactions near a Dirac Photonic Crystal Slab

2021-11-17T20:21:00+01:00Tags: , , , |

Authors: Petrovish Navarro-Baron, Erik; Vinck-Posada, Herbert; Gonzalez-Tudela, Alejandro Journal: ACS PHOTONICS Publication date: 2021/11/17 DOI: 10.1021/acsphotonics.1c00991 Abstract: Dirac energy dispersions are responsible for the extraordinary transport properties of graphene. This motivated the quest for engineering such energy dispersions also in photonics, where they have been predicted to lead to many exciting phenomena. One paradigmatic example [...]

Tailored graphenic structures directly grown on titanium oxide boost the interfacial charge transfer

2021-02-12T10:08:13+01:00Tags: , , , , |

Authors: Munoz, Roberto; Sanchez-Sanchez, Carlos; Merino, Pablo; Lopez-Elvira, Elena; Munuera, Carmen; Gant, Patricia; Lopez, Maria F.; Castellanos-Gomez, Andres; Angel Martin-Gago, Jose; Garcia-Hernandez, Mar Contribution: Article Journal: APPLIED SURFACE SCIENCE Publication date: 2020/02/28 DOI: 10.1016/j.apsusc.2019.144439 Abstract: The successful application of titanium oxide-graphene hybrids in the fields of photocatalysis, photovoltaics and photodetection strongly depends on the interfacial contact [...]

The Electron-Phonon Interaction of Low-Dimensional and Multi-Dimensional Materials from He Atom Scattering

2021-02-12T10:08:07+01:00Tags: , , , , , |

Authors: Benedek, Giorgio; Manson, Joseph R.; Miret-Artes, Salvador Contribution: Article; Early Access Journal: ADVANCED MATERIALS Publication date: 2020/06/01 DOI: 10.1002/adma.202002072 Abstract: Atom scattering is becoming recognized as a sensitive probe of the electron-phonon interaction parameter lambda at metal and metal-overlayer surfaces. Here, the theory is developed, linking lambda to the thermal attenuation of atom scattering spectra [...]

Seeing topological edge and bulk currents in time-of-flight images

2021-02-12T10:08:02+01:00Tags: , , , |

Authors: Rubio-Garcia, Alvaro; Self, Chris N.; Jose Garcia-Ripoll, Juan; Pachos, Jiannis K. Contribution: Article Journal: PHYSICAL REVIEW B Publication date: 2020/07/23 DOI: 10.1103/PhysRevB.102.041123 Abstract: Here we provide a general methodology to directly measure the topological currents emerging in the optical lattice implementation of the Haldane model. Alongside the edge currents supported by gapless edge states, transverse [...]

Topological bulk states and their currents

2021-02-12T10:08:02+01:00Tags: , , , |

Authors: Self, Chris N.; Rubio-Garcia, Alvaro; Jose Garcia-Ripoll, Juan; Pachos, Jiannis K. Contribution: Article Journal: PHYSICAL REVIEW B Publication date: 2020/07/23 DOI: 10.1103/PhysRevB.102.045424 Abstract: We provide evidence that, alongside topologically protected edge states, two-dimensional Chern insulators also support localized bulk states deep in their valence and conduction bands. These states manifest when local potential gradients are [...]

Wigner instability analysis of the damped Hirota equation

2021-02-12T10:07:58+01:00Tags: , , , , |

Authors: Assaubay, Al-Tarazi; Castro, Alejandro J.; Valido, Antonio A. Contribution: Review Journal: PHYSICA D-NONLINEAR PHENOMENA Publication date: 2020/10/01 DOI: 10.1016/j.physd.2020.132587 Abstract: We address the modulation instability of the Hirota equation in the presence of stochastic spatial incoherence and linear time-dependent amplification/attenuation processes via the Wigner function approach. We show that the modulation instability remains baseband type, [...]

Anisotropic Quantum Emitter Interactions in Two-Dimensional Photonic-Crystal Baths

2020-01-16T12:54:29+01:00Tags: , , , |

Authors: Gonzalez-Tudela, Alejandro; Galve, Fernando Contribution: Article Journal: ACS PHOTONICS Publication date: 2019/01/01 DOI: 10.1021/acsphotonics.8b01455 Abstract: Quantum emitters interacting with two-dimensional photonic-crystal baths experience strong and anisotropic collective dissipation when they are spectrally tuned to 2D Van-Hove singularities. In this work, we show how to turn this dissipation into coherent dipole-dipole interactions with tunable range by [...]

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