Optical, structural and Near-IR NLO properties of gold nanoparticles doped sodium zinc borate glasses

Kolavekar, Sangeeta B.; Ayachit, N. H.; Jagannath, G.; NagaKrishnakanth, K.; Rao, S. Venugopal

doi:10.1016/j.optmat.2018.05.083

Cited by 92 publications

(32 citation statements)

References 47 publications

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“…In Eq. ( 7), the sign between two terms is '−ve' for negative nonlinear refraction [37] and is '+ve' for positive nonlinear refraction [34]. The index of nonlinear refraction (n 2 ) is obtained using…”

Section: Resultsmentioning

confidence: 99%

Nonlinear optical studies of sodium borate glasses embedded with gold nanoparticles

et al. 2018

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Optical glasses possessing large third-order optical nonlinear susceptibility and fast response times are promising materials for the development of advanced nonlinear photonic devices. In this context, gold nanoparticle (NP)-doped borate glasses were synthesized via the melt-quench method. The nonlinear optical (NLO) properties of thus prepared glasses were investigated at different wavelengths (i.e., at 532 nm using nanosecond pulses, at 750 nm, 800 nm, and 850 nm wavelengths using femtosecond, MHz pulses). At 532 nm, open aperture (OA) Z-scan signatures of gold NP-doped borate glasses demonstrated reverse saturable absorption (RSA), attributed to mixed intra-band and interband transitions, while in the 750-850 nm region, the OA Z-scan data revealed the presence of saturable absorption (SA), possibly due to intra-band transitions. The NLO coefficients were evaluated at all the spectral regions and further compared with some of the recently reported glasses. The magnitudes of obtained NLO coefficients clearly demonstrate that the investigated glasses are potential materials for photonic device applications.

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Section: Resultsmentioning

confidence: 99%

Nonlinear optical studies of sodium borate glasses embedded with gold nanoparticles

et al. 2018

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“…Global reactivity descriptors evaluated from DFT have been compared with the reactivity, toxicity, stability, and various experimental results. Organic molecules with highly red shifted absorption and emission exhibit pronounced optical nonlinearities . The red shifted HBX based ESIPT motifs will attract future studies in this area.…”

Section: Discussionmentioning

confidence: 99%

Towards NIR‐Active Hydroxybenzazole (HBX)‐Based ESIPT Motifs: A Recent Research Trend

2020

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In this review, we have explored the synthetic strategies adopted for designing the hydroxybenzazoles (imidazole, oxazole, and thiazole) i. e. HBX derivatives which show emission in red and NIR region. Further, we have examined the effect of different substituents i. e. either directly attached or with extended conjugation on a phenolic ring/ phenyl ring of heterocycles to achieve a red to NIR shift in emission. Finally, we have investigated the applications and computational methodologies adopted for red to NIR emitting dyes. In the future, this review will help to design, synthesized and examine the applications of new derivatives of HBX which will show emission in red to NIR region.

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“…The phase difference value (ΔΦ 0 ) is, therefore, obtained by fitting the CA Z-scan experimental data (dotted lines in Figure 7b) using eq 3 (solid lines in Figure 7b). 4,60 = + ΔΦ…”

Section: Raman Spectroscopymentioning

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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Optical, structural and Near-IR NLO properties of gold nanoparticles doped sodium zinc borate glasses

Cited by 92 publications

References 47 publications

Nonlinear optical studies of sodium borate glasses embedded with gold nanoparticles

Nonlinear optical studies of sodium borate glasses embedded with gold nanoparticles

Towards NIR‐Active Hydroxybenzazole (HBX)‐Based ESIPT Motifs: A Recent Research Trend

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

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