Effect of WO 3 in the third-order optical nonlinearities of tungsten lead pyrophosphate glasses

Author(s)

Campos, Gabriel O. ; Clabel, H. J. L. ; Pelosi, Andre G. ; da Silva, Leandro Olivetti E. ; Mastelaro, Valmor R. ; Manzani, Danilo ; Mendonca, Cleber R.

• Document type: Journal article
• Source: Optical Materials; v. 150, p. 8-pg., 2024-04-01.

Abstract

The binary glassy system Pb 2 P 2 O 7 -WO 3 demonstrates promising photonics applications owing to its high polarizability and chemical stability. The domain of glass's chemical state and linear and nonlinear optical properties have been investigated using X-ray photoelectron spectroscopy (XPS), UV-visible spectroscopy, and the Zscan technique, respectively. The optical absorption spectra revealed that the absorption edge was redshifted with increased WO 3 content, suggesting a decrease in bandgap energy. Nonlinear refractive index increased with the WO 3 content from an average value of 0.70 x 10 -19 m 2 W - 1 to 0.98 x 10 -19 m 2 W -1 . Such an increase is due to the rise of non-bridging oxygens and the polarizability of W 6+ and W 5+ species. XPS studies found that a high concentration of WO 3 leads to the transformation of the oxidation state of W 6+ and W 5+ related to the presence of oxygen vacancies. Therefore, our high nonlinear refractive index and polarizability results indicate that the glass system studied here is a potential candidate for photonic devices. (AU)

• FAPESP's process: 18/11283-7 - Nonlinear photonics: spectroscopy and advanced processing of materials
• Grantee: Cleber Renato Mendonça
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 21/09017-0 - Nonlinear refractive index measurement in optical glasses
• Grantee: Gabriel de Oliveira Campos
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 21/11484-5 - Second harmonic generation and hyper-Rayleigh scattering in barium titanate for photonic applications
• Grantee: José Luis Clabel Huamán
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 22/16848-8 - Analysis of the influence of different peripheral groups on the multiphoton absorption of sulfonated imidazopyridines
• Grantee: Gabriel de Oliveira Campos
• Support Opportunities: Scholarships in Brazil - Master