Revealing the fine-structure in semiconductor nanomaterials by multidimensional coherent spectroscopy

• Grant number: 19/22565-6
• Support Opportunities: Scholarships in Brazil - Master
• Start date: January 01, 2020
• End date: October 31, 2021
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Lázaro Aurélio Padilha Junior
• Grantee: Tomás Aguiar Carneiro Ferreira
• Host Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

One of the most important current challenges in the field of colloidal semiconductor quantum dots is to access the materials fine-structure with high enough temporal resolution to allow the understanding of fundamental physical phenomena inside of these quantum confined materials. In this project, we will face this challenge by employing a Multidimensional Coherent Spectroscopy method, which is an extension of transient four-wave mixing (TFWM) spectroscopy and allows obtaining spectral signatures with resolution of sub-meV, while maintaining the ultrafast temporal resolution. Using this method, we will explore fundamental physical processes, such as electron-phonon interactions and the nature of the exciton ground state, in nanomaterials. (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)

NAGAMINE, GABRIEL; JEONG, BYEONG GUK; FERREIRA, TOMAS A. C.; CHANG, JUN HYUK; PARK, KYOUNGWON; LEE, DOH C.; BAE, WAN KI; PADILHA, LAZARO A.. Efficient Optical Gain in Spherical Quantum Wells Enabled by Engineering Biexciton Interactions. ACS PHOTONICS, v. 7, n. 8, p. 2252-2264, AUG 19 2020. (18/15574-6, 18/25339-4, 19/22565-6, 13/16911-2)

NAGAMINE, GABRIEL; FERREIRA, TOMAS A. C.; ALMEIDA, DIOGO B.; LEMUS, JONATHAN C.; CHANG, JUN HYUK; JEONG, BYEONG GUK; BAE, WAN KI; PADILHA, LAZARO A.. Sample Concentration Affects Optical Gain Results in Colloidal Nanomaterials: Circumventing the Distortions by Below Band Gap Excitation. ACS PHOTONICS, DEC 2021. (18/15574-6, 19/22565-6, 18/25339-4, 19/22576-8)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

FERREIRA, Tomás Aguiar Carneiro. Revelando a estrutura fina de nanomateriais semicondutores por espectroscopia coerente multidimensional. 2022. Master's Dissertation - Universidade Estadual de Campinas (UNICAMP). Instituto de Física Gleb Wataghin Campinas, SP.