Publications (39)
Rhodium Nanoparticles for Ultraviolet Plasmonics
Anne Watson, Xiao Zhang, Rodrigo Alcaraz de la Osa +6
The non-oxidizing catalytic noble metal rhodium is introduced for ultraviolet plasmonics. Planar tripods of 8 nm Rh nanoparticles, synthesized by a modified polyol reduction method…
Physical and dynamical properties of the anomalous comet 249P/LINEAR
Julio A. Fernández, Javier Licandro, Fernando Moreno +4
Images and low-resolution spectra of the near-Earth Jupiter family comet (JFC) 249P/LINEAR in the visible range obtained with the instrument OSIRIS in the 10.4m Gran Telescopio Can…
Activity of comet 7P/Pons-Winnecke during the 2021 apparition
Irene Mariblanca-Escalona, Luisa M. Lara, Fernando Moreno +2
Comet 7P/Pons-Winnecke was observed from the Calar Alto Observatory (Spain) for four months during the 2021 inbound apparition. Broad-band visible images were taken between 1.71 an…
Long-lasting activity of asteroid (248370) 2005 QN 173
Oleksandra Ivanova, Javier Licandro, Fernando Moreno +8
We present the results of observations of asteroid (248370) QN obtained during July 2021 - January 2022 with three telescopes. Our analysis revealed the presence of the dus…
The splitting of double-component active asteroid P/2016 J1 (PANSTARRS)
Fernando Moreno, Francisco Pozuelos, Bojan Novakovic +20
We present deep imaging observations, orbital dynamics, and dust tail model analyses of the double-component asteroid P/2016 J1 (J1-A and J1-B). The observations were acquired at t…
Imaging Polarimetry of Comet 67P/Churyumov-Gerasimenko: Homogeneous Distribution of Polarisation and its Implications
Zuri Gray, Stefano Bagnulo, Hermann Boehnhardt +8
Comet 67P/Churyumov-Gerasimenko (67P) become observable for the first time in 2021 since the Rosetta rendezvous in 2014--16. Here, we present pre-perihelion polarimetric measuremen…
Electromagnetic polarization controlled perfect switching effect with high refractive index dimers. the beam-splitter configuration
Angela I. Barreda, Hassan Saleh, Amelie Litman +3
High Refractive Index (HRI) dielectric particles smaller than the wavelength, isolated or forming a designed ensemble are ideal candidates as new multifunctional elements for build…
Sb2S3-Based Optical Switch Exploiting the Brewster Angle Phenomenon
Diego Perez-Frances, Gonzalo Santos, Josef Resl +3
Optical switches based on phase change materials (PCMs) hold great promise for various photonic applications such as telecommunications, data communication, optical interconnects,…
The dust environment of Main-Belt Comet P/2012 T1 (PANSTARRS)
Fernando Moreno, Antonio Cabrera-Lavers, Ovidiu Vaduvescu +2
Main-Belt Comet P/2012 T1 (PANSTARRS) has been imaged using the 10.4m Gran Telescopio Canarias (GTC) and the 4.2m William Herschel Telescope (WHT) at six epochs in the period from…
A short-duration event as the cause of dust ejection from Main-Belt Comet P/2012 F5 (Gibbs)
Fernando Moreno, Javier Licandro, Antonio Cabrera-Lavers
We present observations and an interpretative model of the dust environment of Main-Belt Comet P/2010 F5 (Gibbs). The narrow dust trails observed can be interpreted unequivocally a…
Polarimetry of Didymos-Dimorphos: Unexpected Long-Term Effects of the DART Impact
Zuri Gray, Stefano Bagnulo, Mikael Granvik +9
We have monitored the Didymos-Dimorphos binary system in imaging polarimetric mode before and after the impact from the Double Asteroid Redirection Test (DART) mission. A previous…
Lifted particles from the fast spinning primary of the Near-Earth Asteroid (65803) Didymos
Nair Trógolo, Adriano Campo Bagatin, Fernando Moreno +1
An increasing number of Near Earth Asteroids (NEAs) in the range of a few hundred meters to a few kilometres in size have relatively high spin rates, from less than 4 h, down to $\…
VO2 Nanocrystals for Designer Phase-Change Metamaterials
Jimmy John, Yael Gutierrez, Zhen Zhang +5
Subwavelength nanoparticles can support electromagnetic resonances with distinct features depending on their size, shape and nature. For example, electric and magnetic Mie resonanc…
Dynamics of irregularly-shaped cometary particles subjected to outflowing gas and solar radiative forces and torques
Fernando Moreno, Daniel Guirado, Olga Muñoz +6
The dynamics of irregularly-shaped particles subjected to the combined effect of gas drag and radiative forces and torques in a cometary environment is investigated. The equations…
Brewster quasi bound states in the continuum in all-dielectric metasurfaces from single magnetic-dipole resonance meta-atoms
Diego R. Abujetas, Angela Barreda, Fernando Moreno +4
Bound states in the continuum (BICs) are ubiquitous in many areas of physics, attracting especial interest for their ability to confine waves with infinite lifetimes. Metasurfaces…
Dust environment of long-period comet C/2023 A3 (Tsuchinshan-ATLAS)
Fernando Moreno, Charlotte Goetz, Francisco J. Aceituno +3
We present a characterization of the dust environment of long-period comet C/2023 A3 (Tsuchinshan-ATLAS) by analyzing an extensive dataset, including dust tail images and photometr…
Directional Fano Resonances at Light Scattering by a High Refractive Index Dielectric Sphere
Michael I. Tribelsky, Jean-Michel Geffrin, Amelie Litman +2
In this research, we report the experimental evidence of the directional Fano resonances at the scattering of a plane, linearly polarized electromagnetic wave by a homogeneous diel…
Spectral behavior of localized plasmon resonances in the near- and far-field regimes. Comment on The spectral shift between near- and far-field resonances of optical nano-antennas
Fernando Moreno, Pablo Albella, Manuel Nieto-Vesperinas
In a recent paper by Menzel et al. (Opt. Exp. 22, 9971 (2014)), its authors analyze the spectral red-shift effect of plasmonic resonances of metallic nano-antennas between the far-…
Optical discrimination of live single cancer cells using reflection-based nanohole array sensor
Alfredo Franco, Izan Calderón, Dolores Ortiz +2
In this research, a reflection-based nanohole array sensor system is presented for discriminating between migration-competent cancer cells that maintain the integrity of the actin…
On the fate of slow boulders ejected after DART impact on Dimorphos
Fernando Moreno, Gonzalo Tancredi, Adriano Campo Bagatin
On 2022 September 26th, 23:14 UT the NASA/DART (Double Asteroid Redirection Test) spacecraft successfully impacted Dimorphos, the secondary component of the binary (65803) Didymos…
Lofting of low speed ejecta produced in the DART experiment and production of a dust cloud
Gonzalo Tancredi, Po-Yen Liu, Adriano Campo-Bagatin +2
NASA sent the DART (Double Asteroid Redirection Test) mission to impact Dimorphos, the satellite of the asteroid binary system (65803) Didymos. DART will release LICIACube prior to…
Dust and coma radicals in C/2024 E1 (Wierzchos): evolution of the activity
Irene Mariblanca-Escalona, Pedro J. Gutiérrez, Fernando Moreno +1
We present multi-epoch R-band imaging and long-slit spectroscopy of the dynamically new comet C/2024 E1 (Wierzchos) during its pre-perihelion phase, spanning heliocentric distances…
Models of Rosetta/OSIRIS 67P dust coma phase function
Fernando Moreno, Daniel Guirado, Olga Muñoz +39
The phase function of the dust coma of comet 67P has been determined from Rosetta/OSIRIS images \citep{Bertini17}. This function show a deep minimum at phase angles near 100$^\circ…
COMetary dust TAIL Simulator (COMTAILS): A computer code to generate comet dust tail brightness images
Fernando Moreno
Context. We present the COMetary dust TAIL Simulator (COMTAILS), a numerical Monte Carlo code to generate images of dust tail brightness from comets and active asteroids in the Sol…
Short-term variability of comet C/2012 S1 (ISON) at 4.8 AU from the Sun
Pablo Santos-Sanz, José Luis Ortiz, Nicolás Morales +4
We observed comet C/2012 S1 (ISON) during six nights in February 2013 when it was at 4.8 AU from the sun. At this distance and time the comet was not very active and it was theoret…
Evaluation of effective medium theories for spherical nano-shells
Yael Gutierrez, Dolores Ortiz, Rodrigo Alcaraz de la Osa +4
Current effective medium theories for nano-shells are reviewed. A new method for calculating the effective dielectric function of a core-shell nanoparticle is presented and compare…
Electric and magnetic dipolar response of Germanium spheres: Interference effects, scattering anisotropy and optical forces
Raquel Gómez-Medina, Braulio GarcÃa-Cámara, Irene Suárez-Lacalle +4
We address the scattering cross sections, and their consequences, for submicrometer Germanium spheres. It is shown that there is a wide window in the near infrared where light scat…
Ejecta from the DART-produced active asteroid Dimorphos
Jian-Yang Li, Masatoshi Hirabayashi, Tony L. Farnham +61
Some active asteroids have been proposed to be the result of impact events. Because active asteroids are generally discovered serendipitously only after their tail formation, the p…
High-Q transparency band in all-dielectric metasurfaces induced by a quasi bound state in the continuum
Diego R. Abujetas, Angela Barreda, Fernando Moreno +4
Bound states in the continuum (BICs) emerge throughout Physics as leaky/resonant modes that remain however highly localized. They have attracted much attention in Optics and Photon…
Dust shells and dark linear structures on dust tails of historical and recent long-period comets
Fernando Moreno, Emmanuel Jehin
Context. Dust halos or shells, along with linear dark structures along the axes of dust tails, are commonly observed in many long-period comets near perihelion. Examples range from…
Gold nanodoughnut as an outstanding nanoheater for photothermal applications
Javier González-Colsa, Guillermo Serrera, José MarÃa Saiz +5
Photoinduced hyperthermia is a cancer therapy technique that induces death to cancerous cells via heat generated by plasmonic nanoparticles. While previous studies have shown that…
Ground-based observability of Dimorphos DART impact ejecta: Photometric predictions
Fernando Moreno, Adriano Campo Bagatin, Gonzalo Tancredi +2
The Double Asteroid Redirection Test (DART) is a NASA mission intended to crash a projectile on Dimorphos, the secondary component of the binary (65803) Didymos system, to study it…
Efficient Asymmetric photothermal source: Designing a heating Janus-Nanojet
Javier González-Colsa, Alfredo Franco Pérez, Fernando Bresme +2
Janus particles have flourished as subject of intensive research due to their synergetic properties and their promising use in different fields, especially in biomedicine. The comb…
Early evolution of disrupted asteroid P/2016 G1 (PANSTARRS)
Fernando Moreno, Javier Licandro, Antonio Cabrera-Lavers +1
We present deep imaging observations of activated asteroid P/2016 G1 (PANSTARRS) using the 10.4m Gran Telescopio Canarias (GTC) from late April to early June 2016. The images are b…
Experimental phase function and degree of linear polarization of cometary dust analogs
Elisa Frattin, Olga Muñoz, Fernando Moreno +12
We present experimental phase function and degree of linear polarization curves for seven samples of cometary dust analogues namely: ground pieces of Allende, DaG521, FRO95002 and…
Characterization of the ejecta from NASA/DART impact on Dimorphos: observations and Monte Carlo models
Fernando Moreno, Adriano Campo Bagatin, Gonzalo Tancredi +26
The NASA/DART (Double Asteroid Redirection Test) spacecraft successfully crashed on Dimorphos, the secondary component of the binary (65803) Didymos system. Following the impact, a…
The Dynamical State of the Didymos System Before and After the DART Impact
Derek C. Richardson, Harrison F. Agrusa, Brent Barbee +50
NASA's Double Asteroid Redirection Test (DART) spacecraft impacted Dimorphos, the natural satellite of (65803) Didymos, on 2022 September 26, as a first successful test of kinetic…
Dust environment of active asteroids P/2019 A4 (PANSTARRS) and P/2021 A5 (PANSTARRS)
Fernando Moreno, Javier Licandro, Antonio Cabrera-Lavers +2
We report on the characterisation of the dust activity and dynamical evolution of two faint active asteroids, P/2019 A4, and P/2021 A5, observed with the 10.4m GTC using both imagi…
Comet 22P/Kopff: Dust environment and grain ejection anisotropy from visible and infrared observations
Fernando Moreno, Francisco Pozuelos, Francisco Aceituno +4
We present optical observations and Monte Carlo models of the dust coma, tail, and trail structures of comet 22P/Kopff during the 2002 and 2009 apparitions. Dust loss rates, ejecti…