Antimony orthophosphate glasses with large nonlinear refractive indices, low two-photon absorption coefficients, and ultrafast response

Falcão-Filho, Edílson L.; Araújo, Cid B. de; Bosco, C. A. C.; Maciel, Glauco S.; Acioli, L. H.; Nalin, Marcelo; Messaddeq, Younès

doi:10.1063/1.1828216

Cited by 30 publications

(10 citation statements)

References 20 publications

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“…The phonon energy of Sb–O bond in SbO 3 structural units (~600‐700 cm −1 ) is comparatively low. Because of this reason, Sb 2 O 3 ‐based glasses posses larger values of linear and non‐linear refractive indices when compared with those of other glass materials. As a result, there is a possibility for modulation of their optical constants, (viz., refractive index, n , and absorption coefficient, α ) under electromagnetic irradiation.…”

Section: Introductionmentioning

confidence: 99%

Structural and physical characteristics of Au₂O₃‐doped sodium antimonate glasses – Part I

et al. 2018

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Na2O‐Sb2O3 glasses doped with different concentrations of Au2O3 were prepared by melt quenching technique and later were heat treated at 800°C for 6 hours. Structural analysis by XRD, XPS, SEM, EDS, and DSC techniques indicated that the samples are embedded with multiple crystallites composed of Sb3+, Sb5+, Au3+ ions, and Au0 metallic particles. These studies have further demonstrated a gradual increasing fraction of Au0 metallic particles with increasing Au2O3 concentration. IR spectral studies suggested increasing the degree of polymerization of the glass network (due to increasing concentration of Sb5+ ions that participate in the glass network with SbVO4 structural units) with rise in the concentration of Au2O3. Optical absorption spectra of the titled samples have exhibited a broad absorption band at about 530 nm predicted due to the surface plasmon resonance (SPR) and exhibited a spectral red shift with increasing intensity with increase in Au2O3 content. Photoluminescence (PL) spectra of the samples recorded (at λexc = corresponding SPR band position) exhibited an emission peak at about 580 nm (identified as being due to interband transition between sp and d bands of gold particles). Overall, the analysis of these results has confirmed increasing concentration of Au metallic particles with increase in Au2O3 content in the titled material. Finally, it is predicted that the presence of higher concentration of gold particles in the polymerized antimonate glass network makes the materials useful for designing different nano dimensional optoelectronic devices.

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Section: Introductionmentioning

confidence: 99%

Structural and physical characteristics of Au₂O₃‐doped sodium antimonate glasses – Part I

et al. 2018

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“…The development of nonlinear (NL) photonic devices is motivating the discovery of new optical glasses useful for all-optical switching, optical limiting, lasers, and infrared technologies. Among the glass families known chalcogenides , and antimony based glasses , are examples of materials having appropriate characteristics for photonic devices according to various authors. However, heavy-metal-oxides (HMO) such as Bi 2 O 3 , WO 3 , Sb 2 O 3 , and PbO are subject of intense current research because their NL optical properties can be tailored using appropriate concentrations of elements with large hyperpolarizability and extended infrared transmittance. ,− On the other hand, phosphate glasses, transparent from the ultraviolet to 5 μm, have been increasingly applied in photonics due to their interesting properties, such as low glass transition temperature, T g , and high thermal expansion coefficient that allows easy fabrication of optical fibers. , Among the phosphate glasses, those based on sodium-polyphosphate are frequently used as host matrices because of their high vitrifying ability and unusual capability to dissolve large amounts of other glass formers, modifiers, or intermediate compounds without reduction of glass forming ability .…”

Section: Introductionmentioning

confidence: 99%

The Role of Bi₂O₃ on the Thermal, Structural, and Optical Properties of Tungsten-Phosphate Glasses

et al. 2012

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Glasses in the ternary system (70 - x)NaPO(3)-30WO(3)-xBi(2)O(3), with x = 0-30 mol %, were prepared by the conventional melt-quenching technique. X-ray diffraction (XRD) measurements were performed to confirm the noncrystalline nature of the samples. The influence of the Bi(2)O(3) on the thermal, structural, and optical properties was investigated. Differential scanning calorimetry analysis showed that the glass transition temperature, T(g), increases from 405 to 440 °C for 0 ≤ x ≤ 15 mol % and decreases to 417 °C for x = 30 mol %. The thermal stability against devitrification decreases from 156 to 67 °C with the increase of the Bi(2)O(3) content. The structural modifications were studied by Raman scattering, showing a bismuth insertion into the phosphate chains by Bi-O-P linkage. Furthermore, up to 15 mol % of Bi(2)O(3) formation of BiO(6) clusters is observed, associated with Bi-O-Bi linkage, resulting in a progressive break of the linear phosphate chains that leads to orthophosphate Q(0) units. The linear refractive index, n(0), was measured using the prism-coupler technique at 532, 633, and 1550 nm, whereas the nonlinear (NL) refractive index, n(2) was measured at 1064 nm using the Z-scan technique. Values of 1.58 ≤ n(0) ≤ 1.88, n(2) ≥ 10(-15) cm(2)/W and NL absorption coefficient, α(2) ≤ 0.01 cm/GW, were determined. The linear and NL refractive indices increase with the increase of the Bi(2)O(3) concentration. The large values of n(0) and n(2), as well as the very small α(2), indicate that these materials have large potential for all-optical switching applications in the near-infrared.

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“…17 Further, Lin et al 65 67 evaluated the optical nonlinearity of HMO glasses through the optical Kerr gate method and found that the temporal response was faster than 350 fs. Falcaõ-Filho et al 27 measured the response time of antimony orthophosphate glasses, in which the correlation signals between pump and probe pulses represent ultrafast response (<100 fs) for all glass compositions. Their results clearly demonstrated that the observed nonlinearity arises predominantly from electronic polarization.…”

Section: Raman Spectroscopymentioning

confidence: 99%

“…26 Terashima et al 17 studied the Sb 2 O 3 −B 2 O 3 glasses and reported that the thirdorder nonlinear optical susceptibility [χ (3) ] of binary borate glasses is enhanced with increasing Sb 2 O 3 content. Falcaõ-Filho et al 27 demonstrated that the antimony orthophosphate glasses possess excellent nonlinear refractive index at 800 nm. Very recently, it has been observed that sodium borate glasses with a small amount (2 mol %) of antimony resulted in a small two-photon absorption (2PA) at 800 nm in femtosecond (fs) regime.…”

Section: Introductionmentioning

confidence: 99%

Structural and Femtosecond Third-Order Nonlinear Optical Properties of Sodium Borate Oxide Glasses: Effect of Antimony

et al. 2019

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Structural and optical properties of antimony-containing sodium borate glasses were studied and their ultrafast third-order nonlinear optical (NLO) properties have been evaluated using Z-scan measurements with femtosecond (fs) pulses (∼150 fs, 80 MHz) at 750, 800, and 880 nm wavelengths. Glasses in the (mol %) 20Na 2 O−(80 − x)B 2 O 3 −xSb 2 O 3 (where x = 0, 10, 20, and 30) system have been fabricated via melt quench technique. The structural modifications were analyzed using the Raman and magic angle spinning (MAS)-nuclear magnetic resonance (NMR) ( 11 B MAS-NMR and 23 Na MAS-NMR) techniques. The optical absorption spectra revealed that the absorption edge was red-shifted, suggesting the decrease in band gap energy with increase of antimony content in the glasses. Raman scattering results revealed that the boroxol rings are depressed with the incorporation of Sb 2 O 3 for replacing B 2 O 3 . 11 B MAS-NMR results showed a progressive increase of B 4 units at the expense of B 3 units. The Raman and 11 B MAS-NMR results support the formation of Sb 5+ ions due to oxidation of Sb 3+ that played the role of charge compensation. 23 Na MAS-NMR spectra revealed a decreasing trend in the average of bond lengths of Na−O with increasing Sb 2 O 3 contents. This suggested that sodium changed its role from charge compensator to modifier cation. The antimony-containing glasses demonstrated a reverse saturable absorption in open-aperture Z-scan mode due to two-photon absorption, while closed-aperture Z-scan signatures depicted positive nonlinear refraction due to self-focusing effect. The NLO coefficients were found to increase with Sb 2 O 3 due to the increased nonbridging oxygens and also due to the hyperpolarizability of Sb 3+ and Sb 5+ ions. The observed NLO data clearly suggest that the investigated glasses are beneficial for optical limiting applications.

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Antimony orthophosphate glasses with large nonlinear refractive indices, low two-photon absorption coefficients, and ultrafast response

Cited by 30 publications

References 20 publications

Structural and physical characteristics of Au₂O₃‐doped sodium antimonate glasses – Part I

Structural and physical characteristics of Au₂O₃‐doped sodium antimonate glasses – Part I

The Role of Bi₂O₃ on the Thermal, Structural, and Optical Properties of Tungsten-Phosphate Glasses

Structural and Femtosecond Third-Order Nonlinear Optical Properties of Sodium Borate Oxide Glasses: Effect of Antimony

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Antimony orthophosphate glasses with large nonlinear refractive indices, low two-photon absorption coefficients, and ultrafast response

Cited by 30 publications

References 20 publications

Structural and physical characteristics of Au2O3‐doped sodium antimonate glasses – Part I

Structural and physical characteristics of Au2O3‐doped sodium antimonate glasses – Part I

The Role of Bi2O3 on the Thermal, Structural, and Optical Properties of Tungsten-Phosphate Glasses

Structural and Femtosecond Third-Order Nonlinear Optical Properties of Sodium Borate Oxide Glasses: Effect of Antimony

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Structural and physical characteristics of Au₂O₃‐doped sodium antimonate glasses – Part I

Structural and physical characteristics of Au₂O₃‐doped sodium antimonate glasses – Part I

The Role of Bi₂O₃ on the Thermal, Structural, and Optical Properties of Tungsten-Phosphate Glasses