Departamento de Física

Notícias Notícias

Voltar

12/02/2021 Colóquio (WEBINAR) Optical characterization of defects in 2D materials - Bruno R. Carvalho (Departamento de Física, Universidade Federal do Rio Grande do Norte)

Título:

Optical characterization of defects in 2D materials

 

Coloquialista:

Bruno R. Carvalho (Departamento de Física, Universidade Federal do Rio Grande do Norte)

 

Resumo:

To understand and control the properties of most functional materials requires access to the structure and particles that define the microscopic interactions in these materials. To gain the desired understanding with simultaneous spectroscopic specificity we probe electron, phonon and defects in semiconducting 2D materials with different optical, including Raman, photoluminescence, and nonlinear spectroscopies. We show how we can probe the electronic and vibrational properties associated to defects through Raman and photoluminescence spectroscopy [1-3]. Also, locating and imaging defects in a material is a key challenge to examine the material’s quality for different target applications. We show how nonlinear optical dark-field microscopy can accurately probe 1D defects embedded into semiconducting monolayer dichalcogenides in a quick way [4]. This technique enhances the light-matter interaction by imaging the local profile of these defects. These results highlight the general applicability of the optical spectroscopy to unveil the underlying physics and emerging techniques to image 1D objects in 2D materials.

[1] Physical Review Letters 114, 136403 (2015).

[2] Nature Communications 8, 14670 (2017).

[3] Science Advances 3, e1602813 (2017).

[4] Nano Letters 20, 284 (2020).

 

Data, horário e local:

12 de fevereiro de 2021, (sexta-feira) 16h

Ambiente Virtual: Google Meet

Segue endereço do Webinar:

https://meet.google.com/wwv-mmav-wno

 

Orientações:

1. Entrar com o microfone desligado.

2. Entrar de preferência logado com o novo email institucional (@ufpe.br)

 

Clique aqui para o PDF do cartaz com link do canal

Data da última modificação: 09/02/2021, 09:16

Contato Contato

Chefia
+55-81-2126-7605 / +55-81-2126-7606 / +55-81- 2126.8450 Ramal: 2326
Secretaria de Pós-Graduação
+55-81-2126-7640

Localização Localização