234 citations · 903 across the 12 of their papers we have counts for
12 papers
Unidirectional guided resonances in anisotropic waveguides
Samyobrata Mukherjee, Jordi Gomis-Bresco, David Artigas +1
We show that anisotropic planar anti-guiding waveguide structures with two radiation channels towards the surrounding cladding materials can support unidirectional guided resonance…
Solitary Spectrally-Discrete Bound States in the Continuum in an Open System
Samyobrata Mukherjee, Jordi Gomis-Bresco, David Artigas +1
Bound states in the continuum (BICs) exist in a variety of physical systems where they appear as lossless propagating states surrounded by radiating modes. However, in the case of…
Slow light mediated by mode topological transitions in hyperbolic waveguides
Pilar Pujol-Closa, Jordi Gomis-Bresco, Samyobrata Mukherjee +3
We show that symmetric planar waveguides made of a film composed of a type II hyperbolic metamaterial, where the optical axis (OA) lays parallel to the waveguide interfaces, result…
Quantifying the robustness of topological slow light
Guillermo Arregui, Jordi Gomis-Bresco, Clivia Marfa Sotomayor-Torres +1
Low-dimensional nanostructured materials can guide light propagating with very low group velocity vg. However, this slow light is significantly sensitive to unwanted imperfections…
Angular Control of Anisotropy-Induced Bound States in the Continuum
Samyobrata Mukherjee, Jordi Gomis-Bresco, Pilar Pujol-Closa +2
Radiation of leaky modes existing in anisotropic waveguides can be cancelled by destructive interference at special propagation directions relative to the optical axis orientation,…
Transition from Dirac points to exceptional points in anisotropic waveguides
Jordi Gomis-Bresco, David Artigas, Lluis Torner
We uncover the existence of Dirac and exceptional points in waveguides made of anisotropic materials, and study the transition between them. Dirac points in the dispersion diagram…
Anisotropy-induced photonic bound states in the continuum
Jordi Gomis-Bresco, David Artigas, Lluis Torner
Bound states in the continuum (BICs) are radiationless localized states embedded in the part of the parameter space that otherwise corresponds to radiative modes. Many decades afte…
Topological properties of bound-states-in-the-continuum in geometries with broken anisotropy-symmetry
Samyobrata Mukherjee, Jordi Gomis-Bresco, Pilar Pujol-Closa +2
Waveguiding structures made of anisotropic media support bound states in the continuum (BICs) that arise when the radiation channel of otherwise semi-leaky modes is suppressed. Hit…
A self-stabilized coherent phonon source driven by optical forces
Daniel Navarro-Urrios, Nestor E. Capuj, Jordi Gomis-Bresco +5
Optical forces can set tiny objects into states of coherent mechanical oscillation, also known as mechanical or phonon lasing. We present a novel pumping mechanism in an opto-mecha…
A 1D Optomechanical crystal with a complete phononic band gap
J. Gomis-Bresco, D. Navarro-Urrios, M. Oudich +9
Recent years have witnessed the boom of cavity optomechanics, which exploits the confinement and coupling of optical and mechanical waves at the nanoscale. Amongst their physical i…
A novel high resolution contactless technique for thermal field mapping and thermal conductivity determination: Two-Laser Raman Thermometry
J. S. Reparaz, E. Chavez-Angel, M. R. Wagner +4
We present a novel high resolution contactless technique for thermal conductivity determination and thermal field mapping based on creating a thermal distribution of phonons using…
Phonons in Slow Motion: Dispersion Relations in Ultra-Thin Si Membranes
John Cuffe, Emigdio Chavez, Andrey Shchepetov +11
We report the changes in dispersion relations of hypersonic acoustic phonons in free-standing silicon membranes as thin as \sim 8 nm. We observe a reduction of the phase and group…