| Full text | |
| Author(s): |
Alo, Arthur
;
Barros, Leonardo W. T.
;
Nagamine, Gabriel
;
Lemus, Jonathan C.
;
Planelles, Josep
;
Movilla, Jose L.
;
Climente, Juan I.
;
Lee, Hak June
;
Bae, Wan Ki
;
Padilha, Lazaro A.
Total Authors: 10
|
| Document type: | Journal article |
| Source: | Nano Letters; v. 23, n. 15, p. 8-pg., 2023-07-28. |
| Abstract | |
Colloidal semiconductor nanomaterials present broadband,with largecross-section, two-photon absorption (2PA) spectra, which turn theminto an important platform for applications that benefit from a highnonlinear optical response. Despite that, to date, the only meansto control the magnitude of the 2PA cross-section is by changing thenanoparticle volume, as it follows a universal volume scale, independentof the material composition. As the emission spectrum is connectedutterly to the nanomaterial dimensions, for a given material, themagnitude of the nonlinear optical response is also coupled to theemission spectra. Here, we demonstrate a means to decouple both effectsby exploring the 2PA response of different types of heterostructures,tailoring the volume dependence of the 2PA cross-section due to thedifferent dependence of the density of final states on the nanoparticlevolume. By heterostructure engineering, one can obtain 1 order ofmagnitude enhancement of the 2PA cross-section with minimum emissionspectra shift. (AU) | |
| FAPESP's process: | 18/15574-6 - Advanced spectroscopy of nanomaterials: from ensemble to single-particle |
| Grantee: | Lázaro Aurélio Padilha Junior |
| Support Opportunities: | Research Grants - Young Investigators Grants - Phase 2 |
| FAPESP's process: | 18/25339-4 - Integrated photonics devices |
| Grantee: | Newton Cesario Frateschi |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 19/22823-5 - Two-photon processes in quantum confined semiconductors |
| Grantee: | Arthur Aló de Oliveira |
| Support Opportunities: | Scholarships in Brazil - Master |