Terahertz ultrafast spectroscopy of advanced materials

• Grant number: 24/07460-1
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: August 01, 2024
• End date: January 31, 2027
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Jonathas de Paula Siqueira
• Grantee: Erick Alexander Potosi Montanchez
• Host Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated research grant: 22/03035-9 - Development of ultrashort pulse sources in the vacuum ultraviolet and terahertz for spectroscopy of advanced materials, AP.PNGP.PI

Abstract

In this PhD project, the terahertz time-domain spectroscopy (THz-TDS) technique with ultra-wide bandwidth (1 to 40 meV) will be employed to obtain the spectral dependence of the complex optical conductivity (real and imaginary parts) of advanced materials in both steady-state and transient regimes (pump-probe). Strongly correlated materials (superconductors, heavy-fermions, topological insulators) and conventional semiconductor systems (bulk or nanowires) with potential applications in electronics and optoelectronics will be explored. The main objective of this project is to establish ultra-wide bandwidth THz-TDS spectroscopy as an additional tool in the study of unconventional properties of systems with high electronic correlation and transport mechanisms in semiconductor systems. The student will investigate how the spectral dependence of complex optical conductivity in the THz region can be used to obtain important parameters for describing the underlying electronic dynamics of the properties in the investigated systems.