Two-dimensional spectroscopy of novel nanomaterials

• Grant number: 16/50011-7
• Support Opportunities: Regular Research Grants
• Start date: December 01, 2016
• End date: November 30, 2018
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Agreement: University of Michigan
• Mobility Program: SPRINT - Projetos de pesquisa - Mobilidade
• Principal Investigator: Lázaro Aurélio Padilha Junior
• Grantee: Lázaro Aurélio Padilha Junior
• Principal researcher abroad: Steven Thomas Cundiff
• Institution abroad: University of Michigan , United States
• Host Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• City of the host institution: Campinas
• Associated research grant: 13/16911-2 - Advanced spectroscopy of novel nanomaterials, AP.JP

Abstract

Colloidal semiconductor nanomaterials form a class of materials that offers the possibility for studying the physics of highly confined electrons and open opportunities for applications on several areas. However, a number of important electronic phenomena occur on a ultra-short timescale, from hundreds of femtosecond to some picoseconds and their spectral behavior are hidden underneath the broad absorption and emission bands, due to the finite size distribution. Here we propose to use a multidimentional coherent spectroscopy technique, which allows for temporal and spectral resolution high enough to investigate processes such as electron-electron and electron-phonon interaction and multi-exciton dynamics in those materials. We will combine Prof. Cundiffs group's, which have developed this technique, large experience on coherent multidimentional spectroscopy with Prof. Padilha's group's experience on ultrafast spectroscopy of nanomaterials, to address fundamental questions concerning the electronic dynamics in novel these nanoparticles, whose band structure has been engineered to try to control the interactions described above. Finally, this project will help on the development of this technique at UNICAMP, which will be the first time this method is built in Latin America. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

LIU, A.; ALMEIDA, D. B.; BAE, W. K.; PADILHA, L. A.; CUNDIFF, S. T.. Non-Markovian Exciton-Phonon Interactions in Core-Shell Colloidal Quantum Dots at Femtosecond Timescales. Physical Review Letters, v. 123, n. 5, AUG 2 2019. (13/16911-2, 16/50011-7)

LIU, ALBERT; ALMEIDA, DIOGO B.; BAE, WAN-KI; PADILHA, LAZARO A.; CUNDIFF, STEVEN T.. Simultaneous Existence of Confined and Delocalized Vibrational Modes in Colloidal Quantum Dots. Journal of Physical Chemistry Letters, v. 10, n. 20, p. 6144-6150, OCT 17 2019. (13/16911-2, 16/50011-7)

LIU, ALBERT; ALMEIDA, DIOGO B.; BONATO, LUIZ G.; NAGAMINE, GABRIEL; ZAGONEL, LUIZ F.; NOGUEIRA, ANA F.; PADILHA, LAZARO A.; CUNDIFF, S. T.. Multidimensional coherent spectroscopy reveals triplet state coherences in cesium lead-halide perovskite nanocrystals. SCIENCE ADVANCES, v. 7, n. 1, JAN 2021. (13/16911-2, 16/50011-7)