198 citations · 1k across the 23 of their papers we have counts for
25 papers
Quality factor of dielectric optical resonators
Xavier Zambrana-Puyalto, Søren Raza
We show analytically that the quality () factor of magnetic and electric Mie modes in a lossless dielectric spherical resonator with high refractive index () scales as…
Non-imaging metasurface design for collimated beam shaping
Kirstine Engell Sandager Nielsen, Mads Allerup Carlsen, Xavier Zambrana-Puyalto +1
Non-imaging optical lenses can shape the light intensity from incoherent sources to a desired target intensity profile, which is important for applications in lighting, solar light…
On the helicity conservation for Mie optical cavities
Jorge Olmos-Trigo, Xavier Zambrana-Puyalto
The study of helicity in the context of light-matter interactions is an increasing area of research. However, some fundamental aspects of the helicity content of light fields insid…
Multiple Kerker anapoles in dielectric microspheres
Cristina Sanz-Fernández, Martín Molezuelas, Jon Lasa-Alonso +3
High refractive index dielectric spheres present remarkable light-scattering properties in the spectral range dominated by dipolar modes. However, most of these properties are abse…
Directional coupling of emitters into waveguides: A symmetry perspective
Aristeidis G. Lamprianidis, Xavier Zambrana-Puyalto, Carsten Rockstuhl +1
Recent experiments demonstrated strongly directional coupling of light into waveguide modes. We identify here the mechanisms behind this effect. We consider emitters near a wavegui…
Chemically-controlled self-assembly of hybrid plasmonic nanopores on graphene
Giorgia Giovannini, Matteo Ardini, Nicolo Maccaferri +6
Thanks to the spontaneous interaction between noble metals and biological scaffolds, nanomaterials with unique features can be achieved following relatively straightforward and cos…
Hybrid Metal-Dielectric Plasmonic Zero Mode Waveguide for Enhanced Single Molecule Detection
Xavier Zambrana-Puyalto, Paolo Ponzellini, Nicolo Maccaferri +6
We fabricated hybrid metal-dielectric nanoantennas and measured their optical response at three different wavelengths. The nanostructure is fabricated on a bilayer film formed by t…
Site-selective functionalization of plasmonic nanopores for enhanced fluorescence and Förster Resonance Energy Transfer
Xavier Zambrana-Puyalto, Nicolò Maccaferri, Paolo Ponzellini +3
In this work, we use a site-selective functionalization strategy to decorate plasmonic nanopores with one or more fluorescent dyes. Using an easy and robust fabrication method, we…
Controlled Intracellular Delivery of Single Particles in Single Cells by 3D Hollow Nanoelectrodes
Jian-An Huang, Valeria Caprettini, Yingqi Zhao +6
We present an electrophoretic platform based on 3D hollow nanoelectrodes capable of controlling and quantifying the intracellular delivery of single nanoparticles in single selecte…
Tailoring multipolar Mie scattering with helicity and angular momentum
Xavier Zambrana-Puyalto, Xavier Vidal, Pawel Wozniak +2
Linear scattering processes are usually described as a function of the parameters of the incident beam. The wavelength, the intensity distribution, the polarization or the phase ar…
Transverse multipolar light-matter couplings in evanescent waves
Ivan Fernandez-Corbaton, Xavier Zambrana-Puyalto, Nicolas Bonod +1
We present an approach to study the interaction between matter and evanescent fields. The approach is based on the decomposition of evanescent plane waves into multipoles of well-d…
Far-field measurements of vortex beams interacting with nanoholes
Xavier Zambrana-Puyalto, Xavier Vidal, Ivan Fernandez-Corbaton +1
We measure the far-field intensity of vortex beams going through nanoholes. The process is analyzed in terms of helicity and total angular momentum. It is seen that the total angul…
Equalizing the near and far electromagnetic fields around particles made of different materials
Alexis Devilez, Xavier Zambrana-Puyalto, Brian Stout +1
We demonstrate that the electromagnetic fields scattered by particles made of different materials can be equalized. Emphasize is placed first in metallic nanoparticles that host lo…
Topological metrology and its application to optical position sensing
Nora Tischler, Mathieu L. Juan, Sukhwinder Singh +4
We motivate metrology schemes based on topological singularities as a way to build robustness against deformations of the system. In particular, we relate reference settings of met…
Purcell factor of Mie resonators featuring electric and magnetic modes
Xavier Zambrana-Puyalto, Nicolas Bonod
We present a modal approach to compute the Purcell factor in Mie resonators exhibiting both electric and magnetic resonances. The analytic expressions of the normal modes are used…
Control and characterization of nano-structures with the symmetries of light
Xavier Zambrana-Puyalto
Light beams can be symmetric under different transformations: translations, rotations, mirror symmetries, duality transformations, etc. In this thesis, a systematic way of characte…
Isotropically polarized speckle patterns
Mikolaj K. Schmidt, Javier Aizpurua, Xavier Zambrana-Puyalto +3
The polarization of the light scattered by an optically dense, random solution of dielectric nanoparticles shows peculiar properties when the scatterers exhibit strong electric and…
Angular momentum-induced circular dichroism in non-chiral nanostructures
Xavier Zambrana-Puyalto, Xavier Vidal, Gabriel Molina-Terriza
Circular dichroism (CD), i.e. the differential response of a system to left and right circularly polarized light, is one of the only techniques capable of providing morphological i…
On the transformations generated by the electromagnetic spin and orbital angular momentum operators
Ivan Fernandez-Corbaton, Xavier Zambrana-Puyalto, Gabriel Molina-Terriza
We present a study of the properties of the transversal "spin angular momentum" and "orbital angular momentum" operators. We show that the "spin angular momentum" operators are gen…
Dual and anti-dual modes in dielectric spheres
Xavier Zambrana-Puyalto, Xavier Vidal, Mathieu L. Juan +1
We present how the angular momentum of light can play an important role to induce a dual or anti-dual behaviour on a dielectric particle. Although the material the particle is made…
The role of the angular momentum of light in Mie scattering. Excitation of dielectric spheres with Laguerre-Gaussian modes
Xavier Zambrana-Puyalto, Gabriel Molina-Terriza
We present a method to enhance the ripple structure of the scattered electromagnetic field in the visible range through the use of Laguerre-Gaussian beams. The position of these en…
Excitation of single multipolar modes with engineered cylindrically symmetric fields
Xavier Zambrana-Puyalto, Xavier Vidal, Gabriel Molina-Terriza
We present a new method to address multipolar resonances and to control the scattered field of a spherical scatterer. This method is based on the engineering of the multipolar cont…
The role of angular momentum in the construction of electromagnetic multipolar fields
Nora Tischler, Xavier Zambrana-Puyalto, Gabriel Molina-Terriza
Multipolar solutions of Maxwell's equations are used in many practical applications and are essential for the understanding of light-matter interactions at the fundamental level. U…
Helicity and Angular Momentum. A Symmetry based framework for the study of Light-Matter Interactions
Ivan Fernandez-Corbaton, Xavier Zambrana-Puyalto, Gabriel Molina-Terriza
We propose a new theoretical and practical framework for the study of light-matter interactions and the angular momentum of light. Our proposal is based on helicity, total angular…