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Long-range nonspreading propagation of sound beam through periodic layered structure
Article analyzing dispersion of sound in a solid-fluid layered structure and found a flex point on the isofrequency curve where D vanishes for given direction of propagation and frequency. Nonspreading propagation is experimentally observed in a water steel lattice of 75 periods (~1 meter long) and occurs in the regime of anomalous dispersion and strong acoustic anisotropy when the effective mass along periodicity is close to zero. Under these conditions the incoming beam experiences negative refraction of phase velocity leading to backward wave propagation. The observed effect is explained using a complete set of dynamical equations and our effective medium theory.
Date:
September 2, 2020
Creator:
Zubov, Yurii; Djafari-Rouhani, Bahram; Jin, Yuqi; Sofield, Mathew; Walker, Ezekiel; Neogi, Arup et al.
System:
The UNT Digital Library
Longitudinal Monostatic Acoustic Effective Bulk Modulus and Effective Density Evaluation of Underground Soil Quality: A Numerical Approach
This article introduces a novel method using longitudinal sound to detect underground soil voids to inspect underwater bed property in terms of effective bulk modulus and effective density of the material properties.
Date:
December 25, 2020
Creator:
Jin, Yuqi; Choi, Tae-Youl & Neogi, Arup
System:
The UNT Digital Library
Magnetic confinement of effectively unmagnetized plasma particles
Article develops a planar model for an artificially structured boundary that may provide magnetic confinement of nonmagnetically trapped plasma particles.
Date:
December 1, 2020
Creator:
Ordonez, Carlos A.
System:
The UNT Digital Library
Manufacturing and Characterization of Hybrid Bulk Voxelated Biomaterials Printed by Digital Anatomy 3D Printing
This article proposes non-destructive ultrasound effective density and bulk modulus imaging to evaluate 3D voxelated materials printed by J750 Digital Anatomy 3D Printer of Stratasys. This method provides the design map of voxelated materials and substantially broadens the applications of 3D digital printing in the clinical research area.
Date:
December 30, 2020
Creator:
Heo, Hyeonu; Jin, Yuqi; Yang, David; Wier, Christopher; Minard, Aaron; Dahotre, Narendra B. et al.
System:
The UNT Digital Library
A Miniature Permanent Magnet Assembly with Localized and Uniform Field with an Application to Optical Pumping of Helium
Article using simulations and experimental measurements to design, build, and test a compact and uniform magnetic field source and then apply it to the optical pumping of atomic helium.
Date:
September 24, 2021
Creator:
Cameron, Garnet; Cuevas, Jonathan; Pound, Jeffrey Jr. & Shiner, David
System:
The UNT Digital Library
Momentum-Space Spin Antivortex and Spin Transport in Monolayer Pb
This article finds a nontrivial spin texture, spin antivortex, can appear at certain momenta on the Γ− K line in a 2D monolayer Pb on top of SiC.
Date:
April 21, 2022
Creator:
Yang, Kaijie; Wang, Yuanxi & Liu, Chao-Xing
System:
The UNT Digital Library
Multitask deep-learning-based design of chiral plasmonic metamaterials
This article presents an end-to-end functional bidirectional deep-learning (DL) model for three-dimensional chiral metamaterial design and optimization. This ML model utilizes multitask joint learning features to recognize, generalize, and explore in detail the nontrivial relationship between the metamaterials’ geometry and their chiroptical response, eliminating the need for auxiliary networks or equivalent approaches to stabilize the physically relevant output. This model efficiently realizes both forward and inverse retrieval tasks with great precision, offering a promising tool for iterative computational design tasks in complex physical systems. Other potential applications include photodetectors, polarization-resolved imaging, and circular dichroism (CD) spectroscopy.
Date:
July 1, 2020
Creator:
Ashalley, Eric; Acheampong, Kingsley; Besteiro, Lucas V.; Yu, Peng; Neogi, Arup; Govorov, Alexander O. et al.
System:
The UNT Digital Library
Novel 2D Dynamic Elasticity Maps for Inspection of Anisotropic Properties in Fused Deposition Modeling Objects
Article introducing a novel ultrasonic non-destructive and non-invasive elastography method demonstrated to evaluate the mechanical properties of fused deposition modeling 3D printed objects using two-dimensional dynamical elasticity mapping. Based on the recently investigated dynamic bulk modulus and effective density imaging technique, an angle-dependent dynamic shear modulus measurement was performed to extract the dynamic Young’s modulus distribution of the FDM structures. The elastographic image analysis demonstrated the presence of anisotropic dynamic shear modulus and dynamic Young’s modulus existing in the fused deposition modeling 3D printed objects. The non-destructive method also differentiated samples with high contrast property zones from that of low contrast property regions. The angle-dependent elasticity contrast behavior from the ultrasonic method was compared with conventional and static tensile tests characterization. A good correlation between the nondestructive technique and the tensile test measurements was observed.
Date:
August 30, 2020
Creator:
Jin, Yuqi; Yang, Teng; Heo, Hyeonu; Krokhin, Arkadii A.; Shi, Sheldon; Dahotre, Narendra B. et al.
System:
The UNT Digital Library
Numerical Investigation of Dynamical and Morphological Trends in Relativistic Jets
Article investigates the connection of kiloparsec scale AGN jet properties to their intrinsic parameters and surroundings. This is the accepted manuscript version of the article.
Date:
August 2022
Creator:
Mandal, Soham; Duffell, Paul C. & Li, Yuan
System:
The UNT Digital Library
Optical Pump Terahertz Probe (OPTP) and Time Resolved Terahertz Spectroscopy (TRTS) of emerging solar materials Editor’s Pick
Article describes how photoconductivity is the crucial benchmark to assess the potential of any emerging material for future solar applications. This tutorial aims to familiarize the reader with the main THz techniques used to explore emerging materials.
Date:
July 19, 2023
Creator:
Neu, Jens
System:
The UNT Digital Library
Optimization of the Observing Cadence for the Rubin Observatory Legacy Survey of Space and Time: A Pioneering Process of Community-focused Experimental Design
This article is part of a Focus Issue on the topic of Rubin LSST Survey Strategy Optimization. The motivation, history, and decision-making process of the observing strategy optimization are detailed, giving context to the science-driven proposals and recommendations for the survey strategy included in this Focus Issue.
Date:
December 22, 2021
Creator:
Bianco, Federica B.; Ivezić, Željko; Jones, R. Lynne; Graham, Melissa L.; Marshall, Phil; Saha, Abhijit et al.
System:
The UNT Digital Library
Phononic crystal as a homogeneous viscous metamaterial
Article develops a homogenization theory, representing the low-frequency limit for a phononic crystal of cylinders embedded in a viscous fluid.
Date:
June 8, 2020
Creator:
Krokhin, Arkadii A.; Zubov, Yu.; Ibarias, M. & Arriaga, J.
System:
The UNT Digital Library
Photonic Band Gaps and Resonance Modes in 2D Twisted Moiré Photonic Crystal
Article studying 2D twisted moiré photonic crystals without physical rotation and simulating their photonic band gaps in photonic crystals formed at different twisted angles, different gradient levels, and different dielectric filling factors.
Date:
September 23, 2021
Creator:
Alnasser, Khadijah; Kamau, Steve; Hurley, Noah; Cui, Jingbiao & Lin, Yuankun
System:
The UNT Digital Library
Polymeric Coatings for Skutterudite-Based Thermoelectric Materials
Article is a study with the main objective of mitigation of thermal degradation of skutterudite-based thermoelectric materials—so as to extend the service life of those materials and make them more attractive for industry from the economical perspective. Significant mitigation of oxidation and sublimation of thermoelectric (TE) materials was achieved.
Date:
February 17, 2022
Creator:
Brostow, Witold, 1934-; Chen, Ikang & Hagg Lobland, Haley E.
System:
The UNT Digital Library
Prescriptions for Correcting Ultraviolet-based Redshifts for Luminous Quasars at High Redshift
This article presents near-infrared spectroscopy of 18 luminous quasars at 2.15 < z < 3.70 that allows the authors to obtain reliable systemic redshifts for these sources.
Date:
April 8, 2020
Creator:
Dix, Cooper; Shemmer, Ohad; Brotherton, Michael S.; Green, Richard F.; Mason, Michelle & Myers, Adam D.
System:
The UNT Digital Library
Quantum algorithm for electronic band structures with local tight-binding orbitals
Article says that while the main thrust of quantum computing research in materials science is to accurately measure the classically intractable electron correlation effects due to Coulomb repulsion, designing optimal quantum algorithms for simpler problems with well-understood solutions is a useful tactic to advance our quantum “toolbox”. In this paper, the authors adopt a direct space approach, using a novel hybrid first/second-quantized qubit mapping which allows us to construct a single Hamiltonian, and a single cost-function, suitable for solving the entire electronic band structure.
Date:
June 14, 2022
Creator:
Sherbert, Kyle; Jayaraj, Anooja & Buongiorno Nardelli, Marco
System:
The UNT Digital Library
The refractive index of a single atom experienced by a single photon
Article describes how the refractive index of a system is often viewed as the collective response of a medium to an electromagnetic field. By studying the propagation of a single photon interacting with a two-level atom, the authors examine the dispersion behavior, calculate the phase and group velocity of the photon wave packet, and further analyze the dispersion experienced by the photon.
Date:
October 25, 2023
Creator:
Rostovtsev, Yuri V.; Emerick, Jacob & Patnaik, Anil K.
System:
The UNT Digital Library
Relaxation time approximations in PAOFLOW 2.0
Article presents the implementation of relaxation time approximation models in the calculation of Boltzmann transport in PAOFLOW 2.0 and applies those to model band-structures. In addition, using a self-consistent fitting of the model parameters to experimental conductivity data, the authors provide a flexible tool to extract scattering rates with high accuracy. They illustrate the approximations using simple models and then apply the method to GaAs, Si, Mg₃Sb₂, and CoSb₃.
Date:
March 23, 2022
Creator:
Jayaraj, Anooja; Siloi, Ilaria; Fornari, Marco & Buongiorno Nardelli, Marco
System:
The UNT Digital Library
Resonance modes in moiré photonic patterns for twistoptics
Article studying twistoptics for manipulating optical properties in twisted moiré photonic patterns without physical rotations. The presented approach can lead toward the study of twistoptics for the manipulating of optical properties in moiré patterns with different twist angles.
Date:
April 12, 2021
Creator:
Alnasser, Khadijah; Kamau, Steve; Cui, Jingbiao & Lin, Yuankun
System:
The UNT Digital Library
A resonant single frequency molecular detector with high sensitivity and selectivity for gas mixtures
Article theoretically demonstrates a single low frequency gas detector that can be used for sensing of gas mixtures with high selectivity, accuracy, and sensitivity.
Date:
January 30, 2020
Creator:
Branković, Zorica & Rostovtsev, Yuri V.
System:
The UNT Digital Library
A Review of Diagnostics Methodologies for Metal Additive Manufacturing Processes and Products
This article is a review summarizing and discussing various ex-situ inspections and in-situ monitoring methods, including electron-based methods, thermal methods, acoustic methods, laser breakdown, and mechanical methods, for metal additive manufacturing.
Date:
August 30, 2021
Creator:
Yang, Teng; Mazumder, Sangram; Jin, Yuqi; Squires, Brian; Sofield, Matthew; Pantawane, Mangesh V. et al.
System:
The UNT Digital Library
Role of quantum confinement and interlayer coupling in CrI3-graphene magnetic tunnel junctions
Article presents a combination of first principles and quantum ballistic transport calculations to shed important insights from an atomistic viewpoint on the underlying mechanisms governing spin transport in graphene/ CrI₃ junctions.
Date:
May 29, 2020
Creator:
Buongiorno Nardelli, Marco; Heath, Jonathan J.; Costa, Marcio & Kuroda, Marcelo A.
System:
The UNT Digital Library
Shedding New Light on Weak Emission-Line Quasars in the CIV-Hβ Parameter Space
Article describes how weak emission-line quasars (WLQs) are a subset of Type 1 quasars that exhibit extremely weak Lyα+N V λ1240 and/or C IV λ1549 emission lines. The authors investigate the relationship between emission-line properties and accretion rate for a sample of 230 `ordinary' Type 1 quasars and 18 WLQs at z<0.5 and 1.5<z<3.5 that have rest-frame ultraviolet and optical spectral measurements.
Date:
April 10, 2023
Creator:
Ha, Trung; Dix, Cooper; Matthews, Brandon M.; Shemmer, Ohad; Brotherton, Michael S.; Myers, Adam D. et al.
System:
The UNT Digital Library
Simulation of the formation of antihydrogen via magnetobound positronium
This article simulates Antihydrogen formation involving magnetobound positronium by computing classical trajectories.
Date:
September 9, 2021
Creator:
Aguirre, F. F. & Ordonez, Carlos A.
System:
The UNT Digital Library