Optical nonlinear properties and all optical switching in a synthesized liquid crystal

Al-Hamdani, Uhood J.; Hassan, Qusay M.A.; Zaidan, Ahmed M.; Sultan, H.A.; Hussain, Kawkab Ali; Emshary, C.A.; Alabdullah, Zainab T. Y.

doi:10.1016/j.molliq.2022.119676

Cited by 28 publications

(3 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, wB97XD is considered a functional suitable for predicting properties related to non-covalent interactions, such as molecular binding energies and intermolecular distances [70][71][72]. In addition, some works in the literature use this functional to predict linear and nonlinear optical properties [73][74][75][76]. However, to the best of our knowledge, there is no direct comparison with experimental results with dynamic first-order molecular hyperpolarizabilities.…”

Section: First-order Hyperpolarizability and Quantum Chemical Calcula...mentioning

confidence: 99%

Nonlinear Optical Materials: Predicting the First-Order Molecular Hyperpolarizability of Organic Molecular Structures

et al. 2023

View full text Add to dashboard Cite

Experimental nonlinear optics (NLO) is usually expensive due to the high-end photonics and electronic devices needed to perform experiments such as incoherent second harmonic generation in liquid phase, multi-photon absorption, and excitation. Nevertheless, exploring NLO responses of organic and inorganic compounds has already opened a world of new possibilities. For example, NLO switches, NLO frequency converters, and a new way to obtain biological images through the incoherent second harmonic generation (SHG) originate from first-order molecular hyperpolarizability (β). The microscopic effect of the coherent or incoherent SHG is, in fact, the β. Therefore, estimating β without using expensive photonic facilities will optimize time- and cost-efficiency to predict if a specific molecular structure can generate light with double its incident frequency. In this work, we have simulated the β values of 27 organic compounds applying density functional theory (PBE0, TPSSh, wB97XD, B3LYP, CAM-B3LYP, and M06-2X) and Hartree–Fock methods using the Gaussian software package. The predicted β was compared with the experimental analogs obtained by the well-known Hyper–Rayleigh Scattering (HRS) technique. The most reliable functionals were CAM-B3LYP and M06-2X, with an unsigned average error of around 25%. Moreover, we have developed post-processing software—Hyper-QCC, providing an effortless, fast, and reliable way to analyze the Gaussian output files.

show abstract

Section: First-order Hyperpolarizability and Quantum Chemical Calcula...mentioning

confidence: 99%

Nonlinear Optical Materials: Predicting the First-Order Molecular Hyperpolarizability of Organic Molecular Structures

et al. 2023

View full text Add to dashboard Cite

show abstract

“…[ 78 ] As soft materials, LCs have also been employed as one of the most promising deformable and low‐threshold optical limiters. [ 79 ] The doping of a small number of dichroic dyes in LCs allows for adjustable visible transmission via their reorientation, contributing to lowering the threshold intensity where molecular reorientation occurs. [ 80 ] Thereby, dichroic dye‐doped LC‐based optical limiters could be developed into a high‐performance and cost‐effective laser protection system, showing the crucial importance in military and civilian fields.…”

Section: Dichroic Dye‐doped Lc Devicesmentioning

confidence: 99%

Recent Progress in Functional Dye‐Doped Liquid Crystal Devices

Shen

Zhang

Miao

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

As a typical representative of dopants, organic functional dyes have demonstrated their significant roles in novel smart liquid crystal (LC) devices, and dye-doped LCs have also been a source of inspiration for scientists to design and fabricate stimuli-gated materials or devices for envisioned applications in a wide range of areas. In this review, the focus on dichroic dyes, fluorescent dyes, and photothermal dyes, and the recent progress of the LC devices employing these dyes as dopants are overviewed. The review highlights the developments of the novel LC devices doped with these dyes. The structures, designs, and applications of these devices are outlined. The underlying principles of dichroic dyes, fluorescent dyes, and photothermal dyes which are utilized as functional dopants in LC devices are first introduced. Subsequently, the novel developments of functional dye-doped LC devices in the application fields of smart windows, attenuators for augmented reality (AR) systems, color-changeable textiles, dichroic color filters, dual-mode circular polarizers, chirality detectors, optical limiters, switchable luminescent solar concentrators, multiple information encryption, anti-counterfeiting, photo-addressed transparent displays, circularly polarized luminescence, tunable lasers, and light-driven soft actuators are discussed. Finally, the challenge and the strategies for the future improvement of dye-doped LC devices are also discussed.

show abstract

“…Within the framework of light-matter interaction, various materials in crystal [30][31][32], thin film [33][34][35][36], nanostructure [37], and liquid [38] forms that exhibit nonlinear absorption properties at high light intensities are produced and examined. The nonlinear effect in the transmittance of a material can be observed in two different types, nonlinear absorption (NA) and saturable absorption (SA).…”

Section: Introductionmentioning

confidence: 99%

Revealing photoluminescence and nonlinear optical absorption characteristics of PbMo_0.75W_0.25O₄ single crystal for optical limiting applications

Doğan,

Karatay,

Isik

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

Nonlinear absorption properties of PbMo0.75W0.25O4 single crystal fabricated by the Czochralski method were studied. The band gap energy of the crystal was determined as 3.12 eV. Urbach energy which represents the defect states inside the band gap was found to be 0.106 eV. PbMo0.75W0.25O4 single crystal has a broad photoluminescence emission band between 376 and 700 nm, with the highest emission intensity occurring at 486 nm and the lowest intensity peak at 547 nm, depending on the defect states. Femtosecond transient absorption measurements reveal that the lifetime of localized defect states is found to be higher than the 4 ns pulse duration. Open aperture (OA) Z-scan results demonstrate that the PbMo0.75W0.25O4 crystal exhibits nonlinear absorption (NA) that includes simultaneous two-photon absorption (TPA) as the dominant mechanism at the 532 nm excitations corresponding to 2.32 eV energy. NA coefficient (βeff) increased from 7.24 x 10-10 m/W to 8.81 x 10-10 m/W with increasing pump intensity. At higher intensities βeff tends to decrease with intensity increase. This decrease is an indication that saturable absorption (SA) occurred along with the TPA, called saturation of TPA. The lifetime of the defect states was measured by femtosecond transient absorption spectroscopy. Saturable absorption behavior was observed due to the long lifetime of the localized defect states. Closed aperture (CA) Z-scan trace shows the sign of a nonlinear refractive index. The optical limiting threshold of PbMo0.75W0.25O4 single crystal at the lowest intensity was determined as 3.45 mJ/cm2. Results show that the PbMo0.75W0.25O4 single crystal can be a suitable semiconductor material for optical limiting applications in the visible region.

show abstract

Optical nonlinear properties and all optical switching in a synthesized liquid crystal

Cited by 28 publications

References 73 publications

Nonlinear Optical Materials: Predicting the First-Order Molecular Hyperpolarizability of Organic Molecular Structures

Nonlinear Optical Materials: Predicting the First-Order Molecular Hyperpolarizability of Organic Molecular Structures

Recent Progress in Functional Dye‐Doped Liquid Crystal Devices

Revealing photoluminescence and nonlinear optical absorption characteristics of PbMo_0.75W_0.25O₄ single crystal for optical limiting applications

Contact Info

Product

Resources

About

Optical nonlinear properties and all optical switching in a synthesized liquid crystal

Cited by 28 publications

References 73 publications

Nonlinear Optical Materials: Predicting the First-Order Molecular Hyperpolarizability of Organic Molecular Structures

Nonlinear Optical Materials: Predicting the First-Order Molecular Hyperpolarizability of Organic Molecular Structures

Recent Progress in Functional Dye‐Doped Liquid Crystal Devices

Revealing photoluminescence and nonlinear optical absorption characteristics of PbMo0.75W0.25O4 single crystal for optical limiting applications

Contact Info

Product

Resources

About

Revealing photoluminescence and nonlinear optical absorption characteristics of PbMo_0.75W_0.25O₄ single crystal for optical limiting applications