Genuine two photon absorption and excited state absorption in Fe nanowires decorated β-BaB2O4 nanoplatelets

Babeela, C.; Assiri, Mohammed A.; Girisun, T.C. Sabari

doi:10.1016/j.optmat.2019.109267

Cited by 28 publications

(3 citation statements)

References 40 publications

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“…The variation of the β coefficient with input on-axis intensity is shown in Figure . The 2PA coefficient almost remains a constant throughout the chosen intensity regime, and this signifies the existence of the genuine 2PA process . The PL quantum yield measurements revealed that the 7.5 wt % AG–rGO–MoS 2 hybrid exhibited the lowest quantum yield owing to the higher 2PA cross-section.…”

Section: Nla Studies: Z-scanmentioning

confidence: 77%

“…The 2PA coefficient almost remains a constant throughout the chosen intensity regime, and this signifies the existence of the genuine 2PA process. 34 The PL quantum yield measurements revealed that the 7.5 wt % AG−rGO−MoS 2 hybrid exhibited the lowest quantum yield owing to the higher 2PA crosssection. However, at all the concentrations, the quantum yield values confirmed the 2PA process, and the calculated quantum yield (%) values are tabulated in the table given in the inset of Figure 13.…”

Section: Nla Studies: Z-scanmentioning

confidence: 98%

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Genuine Two-Photon Absorption and Optical Limiting Property of the Ag–rGO–MoS₂ Hybrid: Implications for Laser Safety Devices

T. C.,

2024

ACS Appl. Nano Mater.

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With the extensive use of lasers for a variety of applications in day-to-day life, the need for optical limiters is driven by the importance of ensuring safety and maintaining the reliability and integrity of sensitive optical systems in various applications. Especially the nanosecond 532 nm laser is widely used in a large number of industrial applications, pertaining to the need of optical limiters for specifically attenuating the wavelength of the nanosecond green laser (typically operating at 532 nm). Advanced photonic materials comprising complex networks of metal–organic–inorganic Ag–rGO–MoS2 systems with varying concentrations of Ag (2.5, 5, 7.5, and 10 wt %) were developed, and their nonlinear absorption (NLA) is explored. Under Q-switched nanopulsed Nd:YAG laser (532 nm, 9 ns, 10 Hz) excitation, the hydrothermally synthesized hybrid system exhibited reverse saturable absorption, arising due to the two-photon absorption (2PA) process. The intensity-dependent Z-scan experiment and optical studies portray the existence of a genuine (simple and fast) 2PA mechanism in the hybrid, affirming the possibility of the utilization of the Ag–rGO–MoS2 hybrid for optical limiting applications. The Ag(7.5 wt %)–rGO–MoS2 hybrid showed a higher NLA coefficient of 9 × 10–10 m/W and a corresponding lower optical limiting threshold of 1 × 1012 W/m2. The hybrid exhibits strong absorption in the UV region due to the synergistic contribution of all the individual counter parts of the hybrid. The availability of multiple energy states near the 2PA state, the surface plasmon resonance-induced higher local field, and strong structural defects enhance the fast nonlinear response at nanosecond laser excitation. Thus, the exploration of the nonlinear optical behavior of Ag–rGO–MoS2 against 532 nm nanosecond laser pulses for laser safety applications is reported.

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Section: Nla Studies: Z-scanmentioning

confidence: 77%

Section: Nla Studies: Z-scanmentioning

confidence: 98%

Genuine Two-Photon Absorption and Optical Limiting Property of the Ag–rGO–MoS₂ Hybrid: Implications for Laser Safety Devices

T. C.,

2024

ACS Appl. Nano Mater.

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“…Obtained data as plotted in figure 3 showed minima at the focus (i.e., valley like pattern) indicating the presence of RSA behaviour in these samples. Various processes like two photon absorption (2PA), three photon absorption (3PA), multiphoton absorption, free absorption etc, can lead to the RSA behaviour [38][39][40]. Among these, two-photon absorption or two-photon assisted carrier absorption can occur at a particular wavelength for the condition E g <2hν<2E g contributing to the non-linear absorption in the material.…”

Section: Resultsmentioning

confidence: 99%

Effect of dopants on the nonlinear optical properties of fluorotellurite glasses for optical limiting application

Vani¹,

Vinitha²,

Manikandan³

2021

Phys. Scr.

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Investigation on non-linear optical property of zinc and barium based fluorotellurite glasses based on open aperture Z-scan technique and its application as an optical limiter is reported. Changes in various parameters like polarizability, refractive index and molar refractivity have been attributed to the presence of barium/ zinc atoms and their impact on modifying the structure. Formation of nonbridging sites owing to fluorine doping have been explored based on Raman measurements. Open aperture data shows reverse saturable absorption behaviour and is attributed to the two-photon absorption process. Non-linear absorption values are found to increase with doping of both barium fluoride and zinc fluoride which has been attributed to the formation of non-bridging fluorine sites alongwith the polarizability of barium atoms. Effect of non-bridging fluorine sites on modifying the optical properties have been justified based on the energy bandgap values. Samples show comparably good optical limiting thresholds with a value of 2.59×10 12 W m −2 for the sample with highest fluorine concentration, which enables them to be used as limiting devices.

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Synthesis, growth, and two-photon absorption induced optical limiting action of cytosinium benzoate single crystal

Jaikumar

Balakrishnan²,

Ramamurthi³

et al. 2022

J Mater Sci: Mater Electron

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Genuine two photon absorption and excited state absorption in Fe nanowires decorated β-BaB2O4 nanoplatelets

Cited by 28 publications

References 40 publications

Genuine Two-Photon Absorption and Optical Limiting Property of the Ag–rGO–MoS₂ Hybrid: Implications for Laser Safety Devices

Genuine Two-Photon Absorption and Optical Limiting Property of the Ag–rGO–MoS₂ Hybrid: Implications for Laser Safety Devices

Effect of dopants on the nonlinear optical properties of fluorotellurite glasses for optical limiting application

Synthesis, growth, and two-photon absorption induced optical limiting action of cytosinium benzoate single crystal

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Genuine two photon absorption and excited state absorption in Fe nanowires decorated β-BaB2O4 nanoplatelets

Cited by 28 publications

References 40 publications

Genuine Two-Photon Absorption and Optical Limiting Property of the Ag–rGO–MoS2 Hybrid: Implications for Laser Safety Devices

Genuine Two-Photon Absorption and Optical Limiting Property of the Ag–rGO–MoS2 Hybrid: Implications for Laser Safety Devices

Effect of dopants on the nonlinear optical properties of fluorotellurite glasses for optical limiting application

Synthesis, growth, and two-photon absorption induced optical limiting action of cytosinium benzoate single crystal

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Product

Resources

About

Genuine Two-Photon Absorption and Optical Limiting Property of the Ag–rGO–MoS₂ Hybrid: Implications for Laser Safety Devices

Genuine Two-Photon Absorption and Optical Limiting Property of the Ag–rGO–MoS₂ Hybrid: Implications for Laser Safety Devices