JOURNAL CLUB DO DEPARTAMENTO DE FÍSICA DOS MATERIAIS E MECÂNICA
Nesta semana o pós-graduando, Tiago Cantalice, do Laboratório de Novos Materiais Semicondutores/MBE, apresentará o artigo: “Strain-Gradient Position Mapping of Semiconductor Quantum Dots” Link: https://doi.org/10.1103/PhysRevLett.118.117401
Dia: 24 de maio, quarta-feira, às 12h10.
Local: Sala de Seminários José Roberto Leite, Ed. Alessandro Volta (bloco C) – Sala 110, IFUSP.
Resumo da palestra:
We introduce a nondestructive method to determine the position of randomly distributed semiconductor quantum dots (QDs) integrated in a solid photonic structure. By setting the structure in an oscillating motion, we generate a large stress gradient across the QDs plane. We then exploit the fact that the QDs emission frequency is highly sensitive to the local material stress to map the position of QDs deeply embedded in a photonic wire antenna with an accuracy ranging from ±35 nm down to ±1 nm. In the context of fast developing quantum technologies, this technique can be generalized to different photonic nanostructures embedding any stress-sensitive quantum emitters.
