59 citations · 297 across the 23 of their papers we have counts for
23 papers
Infrared light scattering and emission from epsilon near-zero hyperbolic phonon-polaritons in two-dimensional crystals
Flavio Henrique Feres, Martin Bearzatto, Adrien Debacq +24
This work presents the near-field super-scattering and the near-field thermal emission from 2D hyperbolic crystals as general optical phenomena that link near-field nanophotonics t…
Correlative Analysis of Iron-Driven Structural, Optical, and Magnetic Properties in Natural Biotite Crystals
Raphaela de Oliveira, Yara Galvão Gobato, Ronei C. de Oliveira +9
Biotite crystals are phyllosilicate trioctahedral micas with the general chemical formula K(Mg,Fe)3AlSi3O10(OH)2 that form a solid-solution series with iron-poor phlogopite and iro…
Interplay of energy and charge transfer in WSe2/CrSBr heterostructures
José Roberto de Toledo, Caique Serati de Brito, Barbara L. T. Rosa +12
Van der Waals heterostructures (vdWHs) composed of transition-metal dichalcogenides (TMDs) and layered magnetic semiconductors offer great opportunities to manipulate exciton and v…
Two-dimensional talc as a natural hyperbolic material
Flávio H. Feres, Francisco C. B. Maia, Shu Chen +14
This study demonstrates that two-dimensional talc, a naturally abundant mineral, supports hyperbolic phonon-polaritons (HPhPs) at mid-infrared wavelengths, thus offering a low-cost…
Optical memory in a MoSe/Clinochlore device
Alessandra Ames, Frederico B. Sousa, Gabriel A. D. Souza +10
Two-dimensional heterostructures have been crucial in advancing optoelectronic devices utilizing van der Waals materials. Semiconducting transition metal dichalcogenide monolayers,…
Shaping terahertz waves using anisotropic shear modes in a van der Waals mineral
Nicolas M. Kawahala, Daniel A. Matos, Raphaela de Oliveira +4
Naturally occurring van der Waals (vdW) materials are currently attracting significant interest due to their potential as low-cost sources of two-dimensional materials. Valuable in…
Ultrathin natural biotite crystals as a dielectric layer for van der Waals heterostructure applications
Raphaela de Oliveira, Ana Beatriz Yoshida, Cesar Rabahi +5
Biotite, an iron-rich mineral belonging to the trioctahedral mica group, is a naturally abundant layered material (LM) exhibiting attractive electronic properties for application i…
The Emergence of Mem-Emitters
Victor Lopez-Richard, Igor Ricardo Filgueira e Silva, Alessandra Ames +5
The advent of memristors and resistive switching has transformed solid state physics, enabling advanced applications such as neuromorphic computing. Inspired by these developments,…
Phyllosilicates as earth-abundant layered materials for electronics and optoelectronics: Prospects and challenges in their ultrathin limit
Ingrid D. Barcelos, Raphaela de Oliveira, Gabriel R. Schleder +10
Phyllosilicate minerals are an emerging class of naturally occurring layered insulators with large bandgap energy that have gained attention from the scientific community. This cla…
Review on Infrared Nanospectroscopy of Natural 2D Phyllosilicates
Raphaela De Oliveira, Alisson R. Cadore, Raul O. Freitas +1
Phyllosilicates emerge as a promising class of large bandgap lamellar insulators. Their applications have been explored from fabrication of graphene-based devices to 2D heterostruc…
Impacts of dielectric screening on the luminescence of monolayer WSe
Fabio J. R. Costa, Thiago G-L. Brito, Ingrid D. Barcelos +1
Single layers of transition metal dichalcogenides, such as WSe have gathered increasing attention due to their intense electron-hole interactions, being considered promising ca…
Raman and Far Infrared Synchrotron Nanospectroscopy of Layered Crystalline Talc: Vibrational Properties, Interlayer Coupling and Symmetry Crossover
Raphael Longuinhos, Alisson R. Cadore, Hans A. Bechtel +4
Talc is an insulating layered material that is stable at ambient conditions and has high-quality basal cleavage, which is a major advantage for its use in van der Waals heterostruc…
Design and implementation of a device based on an off-axis parabolic mirror to perform luminescence experiments in a scanning tunneling microscope
Ricardo Javier Peña Román, Yves Auad, Lucas Grasso +5
We present the design, implementation, and illustrative results of a light collection/injection strategy based on an off-axis parabolic mirror collector for a low-temperature Scann…
Tunneling-current-induced local excitonic luminescence in p-doped WSe monolayers
Ricardo Javier Peña Román, Yves Auad, Lucas Grasso +3
We have studied the excitonic properties of exfoliated tungsten diselenide (WSe) monolayers transferred to gold substrates using the tunneling current in a Scanning Tunneling M…
High throughput investigation of an emergent and naturally abundant 2D material: Clinochlore
Raphaela de Oliveira, Luis A. G. Guallichico, Eduardo Policarpo +10
Phyllosilicate minerals, which form a class of naturally occurring layered materials (LMs), have been recently considered as a low-cost source of two-dimensional (2D) materials. Cl…
Exploring the structural and optoelectronic properties of natural insulating phlogopite in van der Waals heterostructures
Alisson R. Cadore, Raphaela de Oliveira, Raphael L. M. Lobato +11
Naturally occurring van der Waals crystals have brought unprecedented interest to nanomaterial researchers in recent years. So far, more than 1800 layered materials (LMs) have been…
Distinctive g-factor of moire-confined excitons in van der Waals heterostructures
Y. Galvão Gobato, C. Serati de Brito, Andrey Chaves +7
We investigated experimentally the valley Zeeman splitting of excitonic peaks in the photoluminescence (PL) spectra of high-quality hBN/WS2/MoSe2/hBN heterostructures at near-zero…
Ultrabroadband nanocavity of hyperbolic phonon polaritons in 1D-like α-MoO3
Ingrid D. Barcelos, Thalita A. Canassa, Rafael A. Mayer +7
The exploitation of phonon-polaritons in nanostructured materials offers a pathway to manipulate infrared (IR) light for nanophotonic applications. Notably, hyperbolic phonons pola…
Group velocity modulation and wavelength tuning of phonon-polaritons by engineering dielectric-metallic substrates
Flávio H. Feres, Rafael A. Mayer, Ingrid D. Barcelos +2
In analogy to the observed for single plasmon-polaritons, we show that subdiffractional hyperbolic phonon-polariton (HP2) modes confined in hexagonal boron nitride (hBN) nanocrysta…
Observation of plasmon-phonon coupling in natural 2D graphene-talc heterostructures
Ingrid D. Barcelos, Alisson R. Cadore, Ananias B. Alencar +8
Two-dimensional (2D) materials occupy noteworthy place in nanophotonics providing for subwavelength light confinement and optical phenomena dissimilar to those of their bulk counte…
Observation of Diode Behavior and Gate Voltage Control of Hybrid Plasmon-Phonon Polaritons in Graphene-Hexagonal Boron Nitride Heterostructures
Francisco C. B. Maia, Brian T. O'Callahan, Alisson R. Cadore +8
Light-matter interaction in two-dimension photonic materials allows for confinement and control of free-space radiation on sub-wavelength scales. Most notably, the van der Waals he…
Damping of Landau levels in neutral graphene at low magnetic fields: A phonon Raman scattering study
F. M. Ardito, T. G. Mendes-de-Sa, A. R. Cadore +6
Landau level broadening mechanisms in electrically neutral and quasineutral graphene were investigated through micro-magneto-Raman experiments in three different samples, namely, a…
Observation of strain-free rolled-up CVD graphene single layers: towards unstrained heterostructures
Ingrid D. Barcelos, Luciano G. Moura, Rodrigo G. Lacerda +1
Single layer graphene foils produced by Chemical Vapor Deposition (CVD) are rolled with self-positioned layers of InGaAs/Cr forming compact multi-turn tubular structures that consi…