Raman Spectroscopy and Photoluminescence

Raman Spectroscopy and Photoluminescence

The research area of Raman Spectroscopy (RS) and Photoluminescence within our group is led by Professors Marcos Pimenta, Jaqueline Soares, and Juliana Brant. Our team focuses on utilizing these powerful techniques to investigate the structural, electronic, and optical properties of a wide range of materials.

Raman Spectroscopy

Raman Spectroscopy is a non-destructive analytical technique that provides detailed information about molecular vibrations, crystal structures, and material compositions. By analyzing the scattering of monochromatic light, typically from a laser, we can obtain a Raman spectrum that acts as a molecular fingerprint of the material.

Applications of Raman Spectroscopy:
  • Characterization of Nanomaterials: Understanding the vibrational properties of graphene, carbon nanotubes, and other nanostructures.
  • Material Science: Investigating phase transitions, stress/strain in crystals, and composition of complex materials.
  • Biological Systems: Analyzing biomolecules, cells, and tissues to study biochemical processes and disease markers.


Photoluminescence (PL) is the emission of light from a material after it has absorbed photons. This technique is essential for probing the electronic and optical properties of semiconductors, insulators, and various nanostructures.

Applications of Photoluminescence:
  • Semiconductor Physics: Studying the electronic band structure, defect states, and excitonic properties of materials.
  • Nanotechnology: Investigating the optical properties of quantum dots, nanowires, and other nanostructured materials.
  • Bioimaging and Sensing: Utilizing photoluminescent properties of materials for advanced imaging techniques and sensors.

Our Research Focus

Our research aims to deepen the understanding of the fundamental properties of materials and explore their potential applications in various technological fields. We combine Raman Spectroscopy and Photoluminescence with other experimental and theoretical approaches to achieve comprehensive insights into the materials we study.

  1. Two-Dimensional Materials: Exploring the properties of graphene, transition metal dichalcogenides (TMDs), and other 2D materials for applications in electronics, photonics, and sensors.
  2. Nanostructured Systems: Investigating nanowires, quantum dots, and other nanostructures to understand their unique optical and electronic behaviors.
  3. Bio-Nanotechnology: Applying RS and PL to study biological molecules, cells, and tissues, aiming to develop new diagnostic and therapeutic tools.