Synthesis, optical linear and non-linear characterization and metal ion sensing application of some novel thieno[2,3-b]thiophene-2,5-dicarbohydrazide Schiff base derivatives by Ahmed. M. M. Soliman, Mahmoud Abd El Aleem Ali Ali El-Remaily, Moumen S. Kamel, Alaa El-Araby, E. Kh. Shokr

“…The high nonlinear refractive index n2 and third-order nonlinear susceptibility χ(3) of these organic thin films are comparable with those of chalcogenide and oxide materials, making them promising for nonlinear optical systems. Compound 4 displays high sensitivity towards metal ion detection (ex. …”
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Theoretical Calculations and Molecular Docking Analysis of 4-(2-(4-Bromophenyl)Hydrazineylidene)-3,5-Diphenyl-4H-Pyrazole Molecule by Ümit Yıldıko, Veysel Tahiroğlu, Mehmet Bağlan, Kenan Gören

“…By taking geometric structures, Highest-Energy Molecular Orbital (HOMO) and Lowest-Energy Molecular Orbital (LUMO) analysis, Mulliken Atomic Charges, Molecular Electrostatic Potential (MEPS), Nonlinear Optical (NLO) features, and Natural Bond Orbital (NBO) images of the molecule from this optimized structure were analyzed. …”
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High-power, ultra-low-noise cascaded diamond Raman lasers with spectrum compression by Hui Chen, Zhongan Zhao, Wenqiang Fan, Yunpeng Cai, Boyuan Zhang, Jie Ding, Yaoyao Qi, Bingzheng Yan, Yulei Wang, Zhiwei Lu, Zhenxu Bai

“…Stimulated Raman scattering is a third-order nonlinear optical effect that is not only effective for wavelength converting laser output, but also for single longitudinal-mode output due to the absence of spatial hole burning. …”
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Optical Characterization of Zinc Modified Bismuth Silicate Glasses by Rajesh Parmar, J. Hooda, R. S. Kundu, R. Punia, N. Kishore

“…The calculated values of the metallization criterion (M) show that the synthesized glasses may be good candidates for new nonlinear optical materials.…”
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Nanoscale thickness Octave-spanning coherent supercontinuum light generation by Susobhan Das, Md Gius Uddin, Diao Li, Yadong Wang, Yunyun Dai, Juha Toivonen, Hao Hong, Kaihui Liu, Zhipei Sun

“…In general, spectral broadening is realized via third-order and higher-order nonlinear optical processes (e.g., self-phase modulation, Raman transition, four-wave mixing, multiwave mixing), which are typically weak and thus require a long interaction length and the phase matching condition to enhance the efficient nonlinear light-matter interaction for broad-spectrum generation. …”
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Experimental Characterization, Computational Investigation, and Structure-propertyeactivity Relationship Studies of Nickel Ferrite Nanostructures by Ali Ben Ahmed

“…Additionally, the theoretical background of nickel ferrite was carved out using Density Functional Theory (DFT) by evaluating the electronic structure through the Frontier Molecular Orbital, Molecular Electrostatic Potential, Milliken charge distribution, Density of state spectrum, and nonlinear optical parameters embedded within the nickel ferrite molecule. …”
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Collective coupling of driven multilevel atoms and its effect on four-wave mixing by P. Yanes-Thomas, R. Gutiérrez-Jáuregui, P. Barberis-Blostein, D. Sahagún-Sánchez, R. Jáuregui, A. Kunold

“…Microscopic models based on multilevel atoms are central to optimizing nonlinear optical responses and the coherent control of light. …”
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Molecular structure, UV–Visible spectra and other molecular properties of (E)-2-(2-hydroxy-5-methoxybenzylidene)hydrazinecarbothioamide and its n-methyl variant by using DFT method... by K. Srishailam, L. Ravindranath, Gaddam. Ramesh, D. Praveena, Sunil kumar V, Danikonda.Suresh Kumar, S. Muthu, G.Ramana Rao

“…For the two compounds under investigation, specific global reactivity descriptors were estimated with the help of frontier molecular orbital (FMO) analysis to understand the origin of UV–Vis spectra. Nonlinear optical (NLO) profile, for each of the two molecules, was computed, with in the frame work of the DFT/B3LYP/6–311++G(d,p) formalism to determine their utility for NLO applications. …”
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Defect state enhanced nonlinear absorption and optical limiting behaviour of erbium doped silver molybdate nanostructures by B. Binish, K. Mani Rahulan, T. C. Sabari Girisun, Nisha S. Panicker

“…Transition metal molybdates exhibits nonlinear optical (NLO) response, which attenuate highly intense light by transmitting light of desired intensity. …”
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Ultranarrow-linewidth stimulated Brillouin scattering with fundamental acoustic waves by Wendao Xu, Maxime Zerbib, Arjun Iyer, Kien Phan Huy, Jean-Charles Beugnot, William H. Renninger

“…Stimulated Brillouin scattering is a well-known nonlinear optical interaction valued for applications including narrow-linewidth lasers, phase conjugation, sensing, and RF-signal processing such as delay lines and filters. …”
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Optical band gap modulation in functionalized chitosan biopolymer hybrids using absorption and derivative spectrum fitting methods: A spectroscopic analysis by Dyari M. Mamand, Dana S. Muhammad, Daron Q. Muheddin, Karzan A. Abdalkarim, Dana A. Tahir, Hawkar A. Muhammad, Shujahadeen B. Aziz, Sarkawt A. Hussen, Jamal Hassan

“…The dopped samples show an increase in their linear optical susceptibility, third-order nonlinear optical susceptibility and nonlinear refractive indices, changing from 3.165 × 10–15 to 2.831 × 10–12 esu. …”
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Roadmap for Designing Donor-<inline-formula><math display="inline"><semantics><mrow><mi mathvariant="bold-sans-serif">π</mi></mrow></semantics></math></inline-formula>-Acceptor Flu... by Guliz Ersoy, Maged Henary

“…These features make them good candidates for various applications such as bioimaging, photovoltaic devices and nonlinear optical materials. Upon excitation of the D-<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi mathvariant="sans-serif">π</mi></mrow></semantics></math></inline-formula>-A fluorophore, intramolecular charge transfer (ICT) occurs, and it polarizes the molecule resulting in the ‘push–pull’ system. …”
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Green approach to synthesis polymer composites based on chitosan with desired linear and non-linear optical characteristics by Dyari M. Mamand, Sarkawt A. Hussen, Shujahadeen B. Aziz

“…The first-order nonlinear ( $$\:{\chi\:}^{\left(1\right)}$$ ), second-order non-linear ( $$\:{\chi\:}^{\left(2\right)}$$ ) and third-order nonlinear optical susceptibility ( $$\:{\chi\:}^{\left(3\right)}$$ ) were determined for all the films.…”
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Dye-based fluorescent organic nanoparticles made from polar and polarizable chromophores for bioimaging purposes: a bottom-up approach by Daniel, Jonathan, Dal Pra, Ophélie, Kurek, Eleonore, Grazon, Chloé, Blanchard-Desce, Mireille

“…Their luminescence can be tuned in the whole visible region down to the Near Infra-Red I (NIR-I) region while their nonlinear optical responses can be enhanced thanks to cooperative effects. …”
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Structural, magnetic, and optical characteristics of undoped and chromium, iron, cobalt, copper, and zinc doped nickel oxide nanopowders by Farzaneh Asaldoust, Khosro Mabhouti, Akbar Jafari, Maryam Taleb-Abbasi

“…This observation suggests that the prepared NiO nanopowders have significant potential in both linear and nonlinear optical devices, optoelectronics, and data storage technologies.…”
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