CV Lattes
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Ministério da Ciência, Tecnologia e Inovação (Brasil). Centro Nacional de Pesquisa em Energia e Materiais (CNPEM) (Institutional affiliation from the last research proposal) Birthplace: Brazil
Staff scientist at the Brazilian Synchrotron Light Laboratory (LNLS) since 2012, Raul O. Freitas is mainly involved in the fields of Synchrotron Infrared Nanospectroscopy (SINS), near-field optics and interferometry, IR beamlines optical design and Fourier Transform Infrared Spectroscopy (FTIR). In charge of the construction and operation of the LNLS IR1 beamline (UVX accelerator) and the new IMBUIA beamline in the Sirius accelerator, the researcher is interested in studies related to nanoscale vibrational properties of materials in general. Prior to enter the infrared nanospectroscopy area, he worked in the field of synchrotron X-ray diffraction applied to the study of nanostructured optoelectronic materials, which was the subject of his PhD jointly achieved at the University of Sao Paulo (USP) and at University of Guelph (UoG/Canada) and lately the subject of his Post-Doc in a collaborative project between LNLS and Hewlett Packard Labs (USA). Still as a Post-Doc, worked briefly as a visitor research in the SSL-ESRF (France). Is an active reviewer of important scientific journals and is currently the chair of the peer-review committee of the Canadian Light Source. Before the academic life, the researcher worked for almost 10 years as a designer in the engineering department of an international company related to the fuels distribution business. (Source: Lattes Curriculum)
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Since the discovery of graphene in 2004, a large variety of two-dimensional (2D) crystals have been synthesized or isolated. They exhibit a large range of electronic, optical and mechanical properties, which can be combined through stacking in van der Waals (vdW) heterostructures, constituting new types of artificial materials. The first heterostructures were synthesized by encapsulating …
Superconductivity in atomically thin topological insulators, ferromagnetism in van der Waals crystals and magical angles regulating high TC superconductivity in graphene twisted bilayers are extraordinary discoveries that have, surprisingly, occurred just in the last 2 years. This type of advance has been routine in the last decade as a consequence of the impact of the discovery of graphe…
Superconductivity in atomically thin topological insulators, ferromagnetism in van der Waals crystals and magical angles regulating high TC superconductivity in graphene twisted bilayers are extraordinary discoveries that have, surprisingly, occurred just in the last 2 years. This type of advance has been routine in the last decade as a consequence of the impact of the discovery of graphe…
(Only some records are available in English at this moment)
Tungsten Telluride (WTe2) is a semimetal belonging to Weyl type II topological class. In addition to having extraordinary electronic characteristics, it is a lamellar material that can be produced in the form of two-dimensional crystals via mechanical exfoliation. Recently, the ability of WTe2 to sustain plasmonic modes was demonstrated by means of infrared nanospectroscopy. Intriguingly,…
Several recent questions related to local properties of two-dimensional (2D) materials are found in the frequency range of a few terahertz (THz). Among these issues is the possibility of the existence of polariton waves in 2Ds based on Transition Metal Dichalcogenides (TMDs), coexisting with phonon activity in the THz range in these materials. Such waves have not yet been experimentally c…
Nanostructured semiconductors represent one of the most relevant advances in Science with applications in several areas of the industry. However, employing them for the development of nanophotonic devices is still a challenge. In contrast, two-dimensional materials, such as graphene and others, have proved to be exceptional platforms for the confinement of light at the nanoscale. Through …
The rise of near-field nanoscopy techniques has unlocked the comprehension of previously inaccessible physical phenomena compared to traditional far-field microscopy. Central to this advancement is scattering near-field scanning microscopy (s-SNOM), a method enabling the investigation of light-matter interactions in nanoscale regions (up to 10 nm) of materials. s-SNOM has propelled nanoph…
Two-dimensional materials (2Ds) are arguably the forerunners of the greatest modern revolution in materials science given their extraordinary properties compared to bulk materials. This Master's project work plan, which is linked to the Jovem Pesquisador project 2019/14017-9, aims at the numerical modeling of polaritonic properties of a variety of photonic crystals, including hBN and alph…
In this scientific initiation project, a detailed experimental study will be carried out on the fabrication and subsequent s-SNOM characterization of 2Ds heterostructures based on lamellar materials (h-BN, MoO3 and Talc) as well as on their lithography in the form of resonators. The fabrication and assembly of the nanostructures will be carried out in the Laboratory of Bidimensional Mater…
(Only some records are available in English at this moment)
In the last decade, we have witnessed the dominance of graphene plasmonics in the nanophotonic realm. Unlike plasmons in noble metals, graphene plasmons can be confined with splendid tunability from the Terahertz (THz) to the mid-infrared (mid-IR). Moreover, by applying magnetic fields to graphene, cyclotron resonances may couple to the collective charges motion, giving rise to magnetopla…
| 4 / 4 | Ongoing research grants |
| 2 / 2 | Completed research grants |
| 3 / 3 | Ongoing scholarships in Brazil |
| 4 / 4 | Completed scholarships in Brazil |
| 1 / 1 | Completed scholarships abroad |
| 14 / 14 | All research grants and scholarships |
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