Exceptional ultrafast nonlinear optical response of functionalized silicon nanosheets

Stavrou, Michalis; Mühlbach, Amelie M.; Arapakis, Vasilios; Groß, Elisabeth; Kratky, Tim; Günther, Sebastian; Rieger, Bernhard; Couris, Stelios

doi:10.1039/d3nr03497f

Cited by 5 publications

(2 citation statements)

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“…Fitting this peak with a Gaussian-type function provides the autocorrelation profile of the laser, which showed a pulse width of approximately 260 fs. The adjacent, more intense peak corresponds to the contribution of molecular reorientation on the NLO response, which is followed by an exponential-like decay of the molecular system as it relaxes toward the equilibrium. , …”

Section: Resultsmentioning

confidence: 99%

Push–Pull Carbazole-Based Dyes: Synthesis, Strong Ultrafast Nonlinear Optical Response, and Effective Photoinitiation for Multiphoton Lithography

Stavrou,

Zyla,

Ladika

et al. 2024

ACS Appl. Opt. Mater.

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The present work reports on the ultrafast nonlinear optical (NLO) properties of a series of D−π−Α and D−A push− pull carbazole-based dyes and establishes a correlation between these properties and their efficiency for potential photonic and optoelectronic applications such as multiphoton lithography (MPL). The ultrafast NLO properties of the studied dyes are determined by two distinct experimental techniques, Z-scan and pump−probe optical Kerr effect (OKE), employing 246 fs laser pulses at 515 nm. The results indicate that chemical functionalization of the carbazole moiety with various strong electron-donating and/or electron-withdrawing groups, such as benzene, styrene, 4bromostyrene, nitrobenzene, trimethyl isocyanurate, methyl, and indane-1,3-dione, can result in a controlled and significant enhancement of the NLO absorptive and refractive responses. In the context of potential applications, the efficiency of carbazole-based organic materials as photoinitiators (PIs) for MPL applications is demonstrated. The fabricated woodpile microstructure using chemically functionalized carbazole as a PI demonstrates improvements in both feature size and MPL efficiency compared to that using unfunctionalized carbazole as a PI. This is attributed to the efficient charge transfer resulting from chemical functionalization, which leads to a substantial increase (approximately 1 order of magnitude) in the values of the imaginary part of the second-order hyperpolarizability (Imγ) and the two-photon absorption cross section (σ). The achieved feature size of 280 nm is comparable to that obtained with other widely used PIs in MPL applications. Additionally, owing to the strong NLO properties of the studied functionalized carbazole, they could also be promising candidates for further applications in photonics and optoelectronics.

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Section: Resultsmentioning

confidence: 99%

Push–Pull Carbazole-Based Dyes: Synthesis, Strong Ultrafast Nonlinear Optical Response, and Effective Photoinitiation for Multiphoton Lithography

Stavrou,

Zyla,

Ladika

et al. 2024

ACS Appl. Opt. Mater.

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“…Researchers have developed various passive optical limiters based on nonlinear mechanisms, including saturable and reverse saturable absorption, two-photon absorption, and multiphoton absorption. 11–15 However, the current issue with existing optical limiters is that their working principle, based on nonlinear optical effects, demands relatively high intensity radiation. 16 Consequently, the transmittance of an optical limiter begins to decrease at a much higher level of incident radiation than is required for optical sensor protection in most cases.…”

Section: Introductionmentioning

confidence: 99%

A 1064 nm laser adaptive limiter with visible light transparency based on one dimensional photonic crystals of LiNbO₃ defects

Xu,

Lu,

Yuan

et al. 2024

Nanoscale

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Aqueous Dispersion of Xenes by Liquid Phase Exfoliation of Monoelemental Crystals in Melamine Solution

Vaso,

Tegkelidi,

Kaloudi

et al. 2024

Chemistry A European J

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Αfter the impressive evolution of graphene and its derivatives, a large number of two dimensional (2D) materials with important optical and electrical properties have been successfully fabricated. Liquid phase exfoliation (LPE) of layered and non‐layered materials has become a widely applied method for the preparation of 2D nanostructures with an extensive variety of applications. However, in most cases organic solvents are used as liquid phase which are often toxic and environmentally unfriendly and lead to low yields. In this work, we present water as a suitable liquid phase and dispersion medium for the exfoliation of layered and non‐layered monoelemental solids from IVA, VA and VIA groups of the periodic table, such as silicon, tin, bismuth and tellurium. The 2D nanostructures, silicene, stanene, bismuthene and tellurene are therefore prepared by a completely sustainable and environmentally friendly method. The prepared Xenes, as they are called, are fully characterized by microscopic and spectroscopic techniques.

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Exceptional ultrafast nonlinear optical response of functionalized silicon nanosheets

Abstract: This study reveals that the functionalization of silicon nanosheets with styrene and tBuMA leads to nanostructures with exceptional nonlinear optical response. These nanostructures could have potential applications in optoelectronics and photonics.

Cited by 5 publications

References 82 publications

Push–Pull Carbazole-Based Dyes: Synthesis, Strong Ultrafast Nonlinear Optical Response, and Effective Photoinitiation for Multiphoton Lithography

Push–Pull Carbazole-Based Dyes: Synthesis, Strong Ultrafast Nonlinear Optical Response, and Effective Photoinitiation for Multiphoton Lithography

A 1064 nm laser adaptive limiter with visible light transparency based on one dimensional photonic crystals of LiNbO₃ defects

Aqueous Dispersion of Xenes by Liquid Phase Exfoliation of Monoelemental Crystals in Melamine Solution

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Exceptional ultrafast nonlinear optical response of functionalized silicon nanosheets

Abstract: This study reveals that the functionalization of silicon nanosheets with styrene and tBuMA leads to nanostructures with exceptional nonlinear optical response. These nanostructures could have potential applications in optoelectronics and photonics.

Cited by 5 publications

References 82 publications

Push–Pull Carbazole-Based Dyes: Synthesis, Strong Ultrafast Nonlinear Optical Response, and Effective Photoinitiation for Multiphoton Lithography

Push–Pull Carbazole-Based Dyes: Synthesis, Strong Ultrafast Nonlinear Optical Response, and Effective Photoinitiation for Multiphoton Lithography

A 1064 nm laser adaptive limiter with visible light transparency based on one dimensional photonic crystals of LiNbO3 defects

Aqueous Dispersion of Xenes by Liquid Phase Exfoliation of Monoelemental Crystals in Melamine Solution

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Product

Resources

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A 1064 nm laser adaptive limiter with visible light transparency based on one dimensional photonic crystals of LiNbO₃ defects