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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Simple Yet Effective Method to Determine Multiphoton Absorption Cross Section of Colloidal Semiconductor Nanocrystals

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Alo, Arthur [1] ; Barros, Leonardo W. T. [1] ; Nagamine, Gabriel [1] ; Vieira, Lucas B. [1] ; Chang, Jun Hyuk [2] ; Jeong, Byeong Guk [2] ; Bae, Wan Ki [2] ; Padilha, Lazaro A. [1]
Total Authors: 8
[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, UNICAMP, BR-13083859 Campinas, SP - Brazil
[2] Sungkyunkwan Univ, SKKU Adv Inst Nanotechnol SAINT, Suwon 16419, Gyeonggi Do - South Korea
Total Affiliations: 2
Document type: Journal article
Source: ACS PHOTONICS; v. 7, n. 7, p. 1806-1812, JUL 15 2020.
Web of Science Citations: 0

Colloidal semiconductor nanocrystals (NCs) are on the vanguard of nonlinear optical materials due to their superb optical properties including tunable multiphoton absorption (MPA) with large absorption cross sections. So far, investigating MPA of NCs has been regarded as a difficult task, mostly constrained by the lack of measurement techniques with high precision and consistency. Here, an alternative method to measure the MPA cross section of luminescent NCs is presented. The new method, referred to as multiphoton absorption photoluminescence saturation (MPAPS), does not depend on any specific property of an NC sample, allowing for a precise comparative study of NC samples either holding different structures (e.g., core-only or core-shell heterostructure) or exhibiting slow multicarrier dynamics (e.g., engineered NCs for reduced Auger rates). (AU)

FAPESP's process: 18/15574-6 - Advanced spectroscopy of nanomaterials: from ensemble to single-particle
Grantee:Lázaro Aurélio Padilha Junior
Support type: Research Grants - Young Investigators Grants - Phase 2
FAPESP's process: 19/22823-5 - Two-photon processes in quantum confined semiconductors
Grantee:Arthur Aló de Oliveira
Support type: Scholarships in Brazil - Master
FAPESP's process: 13/16911-2 - Advanced spectroscopy of novel nanomaterials
Grantee:Lázaro Aurélio Padilha Junior
Support type: Research Grants - Young Investigators Grants