113 citations · 383 across the 23 of their papers we have counts for
24 papers
New horizons in near-zero refractive index photonics and hyperbolic metamaterials
Michaël Lobet, Nathaniel Kinsey, Iñigo Liberal +7
The engineering of the spatial and temporal properties of both the electric permittivity and the refractive index of materials is at the core of photonics. When vanishing to zero,…
Addressing the impact of surface roughness on epsilon-near-zero substrates
David Navajas, José Manuel Pérez-Escudero, Iñigo Liberal
Epsilon-near-zero (ENZ) media have been very actively investigated due to their unconventional wave phenomena and strengthened nonlinear response. However, the technological impact…
A tutorial on the conservation of momentum in photonic time-varying media
Angel Ortega-Gomez, Michaël Lobet, J. Enrique Vázquez-Lozano +1
Time-varying media break temporal symmetries while preserving spatial symmetries intact. Thus, it represents an excellent conceptual framework to investigate the fundamental implic…
Incandescent temporal metamaterials
J. Enrique Vázquez-Lozano, Iñigo Liberal
Regarded as a promising alternative to spatially shaping matter, time-varying media can be seized to control and manipulate wave phenomena, including thermal radiation. Here, based…
Suppressed-scattering windows for radiative cooling applications
José M. Pérez-Escudero, Alicia E. Torres-García, Carloz Leazun +5
The scattering of light by resonant nanoparticles is a key process for enhancing the solar reflectance in daylight radiative cooling. Here, we investigate the impact of material di…
Spectrally stable thermal emitters enabled by material-based high-impedance surfaces
David Navajas, José Manuel Pérez-Escudero, Iñigo Liberal
Radiative thermal engineering with subwavelength metallic bodies is a key element for heat and energy management applications, communication and sensing. Here, we numerically and e…
Shaping the quantum vacuum with anisotropic temporal boundaries
Iñigo Liberal, J. Enrique Vázquez-Lozano
Temporal metamaterials empower novel forms of wave manipulation with direct applications to quantum state transformations. In this work, we investigate vacuum amplification effects…
Quantum antireflection temporal coatings: quantum state frequency shifting and inhibited thermal noise amplification
Iñigo Liberal, J. Enrique Vázquez-Lozano, Victor Pacheco-Peña
We investigate the quantum optical response of antireflection temporal coatings, i.e., matching temporal layers that suppress the generation of backward waves in temporal boundarie…
Electrically switchable Casimir forces using transparent conductive oxides
Tao Gong, Benjamin Spreng, Miguel Camacho +3
Casimir forces between charge-neutral bodies originate from quantum vacuum fluctuations of electromagnetic fields, which exhibit a critical dependence on material's electromagnetic…
The Effect of Epsilon-Near-Zero (ENZ) Modes on the Casimir Interaction between Ultrathin Films
Tao Gong, Inigo Liberal, Benjamin Spreng +3
Vacuum fluctuation-induced interactions between macroscopic metallic objects result in an attractive force between them, a phenomenon known as the Casimir effect. This force is the…
Radiative energy bandgap of nanostructures coupled with quantum emitters around the epsilon-near-zero (ENZ) frequency
Tao Gong, Inigo Liberal, Miguel Camacho +3
Epsilon-near-zero (ENZ) materials have been demonstrated to exhibit unique electromagnetic properties. Here we propose the concept of radiative energy bandgap for an ENZ nanopartic…
Engineering Casimir interactions with epsilon-near-zero materials
Miguel Camacho, Tao Gong, Benjamin Spreng +3
In this paper we theoretically demonstrate the tunability of the Casimir force both in sign and magnitude between parallel plates coated with dispersive materials. We show that thi…
Optomagnonics in dispersive media: magnon-photon coupling enhancement at the epsilon-near-zero frequency
V. A. S. V. Bittencourt, I. Liberal, S. Viola Kusminskiy
Reaching strong light-matter coupling in solid-state systems has been long pursued for the implementation of scalable quantum devices. Here, we put forward the concept of a platfor…
Light propagation and magnon-photon coupling in optically dispersive magnetic media
V. A. S. V. Bittencourt, I. Liberal, S. Viola Kusminskiy
Achieving strong coupling between light and matter excitations in hybrid systems is a benchmark for the implementation of quantum technologies. We recently proposed [arXiv:2110.029…
A generalized approach to quantum interference in lossy N-port devices via a singular value decomposition
Osmery Hernández, Iñigo Liberal
Modeling quantum interference in the presence of dissipation is a critical aspect of quantum technologies. Including dissipation into the model of a linear device enables for asses…
Momentum considerations inside near-zero index materials
Michaël Lobet, Iñigo Liberal, Larissa Vertchenko +3
Near-zero-index (NZI) materials, i.e. materials having a phase refractive index close to zero, are known to enhance or inhibit light-matter interactions. Most theoretical derivatio…
Nonperturbative decay dynamics in metamaterial waveguides
Iñigo Liberal, Richard W. Ziolkowski
In this work we investigate the nonperturbative decay dynamics of a quantum emitter coupled to a composite right/left handed transmission line (CRLH-TL). Our theory captures the co…
On modifications of fundamental radiative processes in near-zero-index media of various dimensions
Lobet Michaël, Iñigo Liberal, Erik N. Knall +5
Spontaneous emission, stimulated emission and absorption are the three fundamental radiative processes describing light-matter interactions. Here, we theoretically study the behavi…
Control of a quantum emitter's bandwidth by managing its reactive power
Iñigo Liberal, Iñigo Ederra, Richard W. Ziolkowski
Reactive power plays a crucial role in the design of small antenna systems, but its impact on the bandwidth of quantum emitters is typically disregarded. Here, we theoretically dem…
Dispersion Synthesis with Multi-Ordered Metatronic Filters
Yue Li, Iñigo Liberal, Nader Engheta
We propose the synthesis of frequency dispersion of layered structures based on the design of multi-ordered optical filters using nanocircuit concepts. Following the well known ins…
Nonradiating and radiating modes excited by quantum emitters in open epsilon-near-zero cavities
Iñigo Liberal, Nader Engheta
Controlling the emission and interaction properties of quantum emitters (QEs) embedded within an optical cavity is a key technique in engineering light-matter interactions at the n…
Geometry-Invariant Resonant Cavities
Iñigo Liberal, Ahmed M. Mahmoud, Nader Engheta
Resonant cavities are one of the basic building blocks in various disciplines of science and technology, with numerous applications ranging from abstract theoretical modeling to ev…
Superbackscattering Nanoparticle Dimers
Iñigo Liberal, Iñigo Ederra, Ramón Gonzalo +1
The theory and design of superbackscattering nanoparticle dimers are presented. We analytically derive the optimal configurations and the upper bound of their backscattering cross-…
Least Upper Bounds of the Powers Extracted and Scattered by Bi-anisotropic Particles
Inigo Liberal, Younes Ra'di, Ramon Gonzalo +3
The least upper bounds of the powers extracted and scattered by bi-anisotropic particles are investigated analytically. A rigorous derivation for particles having invertible polari…