Article
Optics
Jyothsna Konkada Manattayil, Lal A. S. Krishna, Rabindra Biswas, Hyunmin Kim, Varun Raghunathan
Summary: In this study, we demonstrate sub-diffraction imaging in an infrared-sensitive third-order sum frequency generation microscope using the focal-field engineering technique. The presence of a phase mask leads to a reduction in the size of the TSFG central lobe and an improvement in contrast for periodic grating structures. Additionally, the infrared sensitivity of the focus-engineered TSFG microscope is validated through imaging of amorphous Germanium-based structures and polystyrene latex beads. The focus-engineered TSFG process shows promise as an imaging modality with infrared selectivity, improved resolution, and contrast, making it suitable for nanostructure and surface layer imaging.
Article
Computer Science, Software Engineering
Chiara Hergl, Carina Witt, Baldwin Nsonga, Andreas Menzel, Gerik Scheuermann
Summary: Electroactive polymers are commonly used in engineering applications due to their ability to change shape and properties with an electric field. This paper focuses on understanding the electromechanical coupling by analyzing the third-order coupling tensor using visualization methods. Four examples, including electromechanical coupling, are simulated and analyzed within a finite element framework.
IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS
(2023)
Article
Physics, Applied
Taher Zahedi, Zaker Hossein Firouzeh
Summary: This study reports enhanced third-harmonic generation through intersubband transitions in an asymmetric InxGa1-xN/InN double quantum well. It comprehensively analyzes the impacts of various structural parameters and calculates conduction band parameters and contributions from electron scattering processes. By designing optimized double quantum wells, the study demonstrates significant third-order susceptibility for potential optoelectronic device applications in the infrared spectrum.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Multidisciplinary Sciences
Hendradi Hardhienata, Salim Faci, Adalberto Alejo-Molina, Mohammad Ryan Priatama, Husin Alatas, Muhammad Danang Birowosuto
Summary: This study presents a novel theoretical analysis using the simplified bond hyperpolarizability model (SBHM) to approach the nonlinear tensor and compares it with group theory (GT). The analysis is based on a light-matter interaction classical phenomenological framework, requiring fewer independent parameters in the tensor than GT. This approach may open the path for similar analysis in other complex semiconductor surfaces and structures in the future, with potential applications to nanoscale surface characterization and real-time surface deposition monitoring.
Article
Engineering, Electrical & Electronic
Yi Yang, Lixin Han, Yuanzhen Liu, Jun Zhu, Hong Yan
Summary: Inspired by the accuracy and efficiency of the gamma-norm of a matrix, the study generalizes the gamma-norm to tensors and proposes a new tensor completion approach within the tensor singular value decomposition framework. An efficient algorithm, combining the augmented Lagrange multiplier and closed-resolution of a cubic equation, is developed to solve the associated nonconvex tensor multi-rank minimization problem. Experimental results demonstrate that the proposed approach outperforms current state of the art algorithms in recovery accuracy.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2021)
Article
Chemistry, Applied
Yan Zhou, Xiaocheng Zhang, Yaohui Cheng, Jinming Zhang, Qinyong Mi, Chunchun Yin, Jin Wu, Jun Zhang
Summary: In this study, a rapid benzoylation reaction of cellulose was achieved in an ionic liquid, with a newly discovered anion-tunnel transfer effect. The resulting cellulose tribenzoates showed excellent solubility, allowing accurate determination of the molecular weight parameters by gel permeation chromatography.
CARBOHYDRATE POLYMERS
(2022)
Article
Optics
Jeetendra Gour, Sebastian Beer, Alessandro Alberucci, Uwe D. Zeitner, Sstefan Nolte
Summary: We experimentally investigate third harmonic generation from plasmonic metasurfaces composed of centrosymmetric gold nanobars arranged in two-dimensional rectangular lattices. We demonstrate that surface lattice resonances (SLRs) at the relevant wavelengths play a significant role in determining the magnitude of the nonlinear effects by varying the incidence angle and lattice period. Moreover, exciting multiple SLRs simultaneously leads to an additional enhancement in third harmonic generation, which results in interesting phenomena such as maximum enhancement for counter-propagating surface waves along the metasurface and cascading effect simulating a third-order nonlinearity.
Article
Chemistry, Multidisciplinary
Yadong Wang, Fadil Iyikanat, Habib Rostami, Xueyin Bai, Xuerong Hu, Susobhan Das, Yunyun Dai, Luojun Du, Yi Zhang, Shisheng Li, Harri Lipsanen, F. Javier Garcia de Abajo, Zhipei Sun
Summary: This study investigates various electronic states in monolayer MoS2 using broadband static and transient third-harmonic spectroscopy, revealing the modulation depth and its correlation with excitonic states. The results suggest that these techniques can serve as promising platforms for the characterization of semiconductors and disruptive research in photonics and optoelectronics.
ADVANCED MATERIALS
(2022)
Article
Multidisciplinary Sciences
Guillaume Revillod, Julien Duboisset, Isabelle Russier-Antoine, Emmanuel Benichou, Christian Jonin, Pierre-Francois Brevet
Summary: A general model has been developed to describe the polarization-resolved second harmonic scattering (SHS) response from a liquid solution of molecular aggregates, considering both coherent and incoherent contributions based on the spatial order of the molecules. The model shows that the SHS response can differentiate between centrosymmetric and non-centrosymmetric spatial arrangements of the nonlinear dipoles, providing insights into the spatial arrangements of dyes in aggregates despite their small nanoscale dimensions.
Article
Physics, Multidisciplinary
Matteo Broccoli, Nihat Sadik Deger, Stefan Theisen
Summary: This work presents a class of interacting (d - 2)-form theories in d dimensions that are third-way consistent. These theories have interaction terms in the p-form field equations of motion that do not arise from the variation of an action or off-shell conservation. However, the full equations remain on-shell consistent. The models also allow for generalizations, such as coupling with (d - 3)-forms, where three algebras play a prominent role, and can recover a modified three-dimensional Yang-Mills theory as well as straightforwardly enable higher derivative extensions.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Jorge H. Soares, Lais Fujii Dos Santos, Felipe G. S. Santos, Marvyn Inga, Yovanny A. V. Espinel, Gustavo S. Wiederhecker, Thiago P. Mayer Alegre
Summary: This study demonstrates third-harmonic generation using a small wedge silicon oxide optical microcavity. The dispersion of the microdisks can be tailored to normal or anomalous group velocity dispersion, and the authors operated in the normal dispersion regime to prevent frequency comb generation. The tunability of the third-harmonic emission was achieved through thermo-optical and Kerr effects, and the agreement between this process and couple-mode theory was demonstrated.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Huojiao Sun, Jie Wang, Zong Xu, Ke Tang, Wanyi Li
Summary: Fiber optic sensors are commonly used as acoustic sensors to detect sound waves due to their advantages, including anti-electromagnetic interference and strong environmental adaptability. By using a simple model, the principle of the optical fiber sensor to detect acoustic wave signals was explored, and it was found that the change in birefringence of the fiber can only be effectively caused by the acoustic wave when the number of azimuthal modes is 2. The acoustic wave was successfully detected using a fiber sensor. By analyzing the detection mechanism, it was found that the spectral width is proportional to the acoustic impedance of the surrounding medium, and the acoustic interaction between the TR22 mode and the surrounding medium is much weaker than that of the TR21 mode. This provides a theoretical basis for the detection of acoustic signals by fiber optic sensors.
Article
Optics
Simon Zaslawski, Zhisheng Yang, Luc Thevenaz
Summary: This study introduces a novel distributed measurement technique which extracts local FSBS information by measuring the frequency shift of a short optical pulse subjected to phase chirp modulation caused by harmonic FSBS oscillation. In contrast to existing techniques, this method offers higher spatial resolutions.
Article
Engineering, Electrical & Electronic
Julio Cesar Santos Ferrari, Anderson Ricardo Justo de Araujo, Sergio Kurokawa
Summary: This study analyzes the voltage profile along a three-phase transmission line where power transfer capability is increased by injecting a third harmonic voltage component. The technique can significantly affect voltage amplitudes along the line, making it not feasible for 735kV transmission lines.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Article
Polymer Science
Atreyee Banerjee, Hsiao-Ping Hsu, Kurt Kremer, Oleksandra Kukharenko
Summary: Understanding the nature of glass transition and estimating the glass transition temperature for polymeric materials are open questions in experimental and theoretical polymer sciences. Our data-driven approach, using molecular dynamics simulation and considering individual chain structural information, accurately identifies the glass transition temperature of polymer melts. By combining principal component analysis and clustering, we can identify the glass transition temperature even from short time trajectories. Our approach is straightforward and applicable to other polymeric glass-forming liquids.
