40 Matching Results

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Tunable Hybrid Phononic Crystal Lens Using Thermo-Acoustic Polymers (open access)

Tunable Hybrid Phononic Crystal Lens Using Thermo-Acoustic Polymers

Article describes a study where a tunable hybrid solid ultrasonic lens is realized by combining a PnC lens with PVA-PNIPAm thermoacoustic hydrogel to modify the transmission and dispersion properties of transient acoustic waves.
Date: September 30, 2019
Creator: Walker, Ezekiel; Reyes-Contreras, Delfino; Jin, Yuqi & Neogi, Arup
System: The UNT Digital Library
Towards Deep Integration of Electronics and Photonics (open access)

Towards Deep Integration of Electronics and Photonics

This is a review of applications of polariton modes related to the design and fabrication of electro-optical circuits. The emphasis is made on surface plasmon-polaritons which have already demonstrated their value in many fields of technology. Other possible quasiparticles as well as their hybridization with plasmons are discussed.
Date: November 12, 2019
Creator: Pshenichnyuk, Ivan A.; Kosolobov, Sergey S. & Drachev, Vladimir P.
System: The UNT Digital Library

Concentric cone antihydrogen gravity experiment

This article describes a proposed antihydrogen gravity experiment that could be conducted at the CERN Antiproton Decelerator facility to determine the directionality of the acceleration of antihydrogen in earth’s gravitational field.
Date: October 2, 2019
Creator: Patel, S. S.; Sun, S. R. & Ordonez, Carlos A.
System: The UNT Digital Library
Label-free characterization of white blood cells using fluorescence lifetime imaging and flow-cytometry: molecular heterogeneity and erythrophagocytosis [Invited] (open access)

Label-free characterization of white blood cells using fluorescence lifetime imaging and flow-cytometry: molecular heterogeneity and erythrophagocytosis [Invited]

Article reporting the results of blood cell characterization using label-free fluorescence imaging techniques and flow-cytometry. Autofluorescence parameters of different cell types – white blood cells, red blood cells, erythrophagocytic cells – are assessed and analyzed in terms of molecular heterogeneity and possibilities of differentiation between different cell types in vitro and in vivo.
Date: July 29, 2019
Creator: Drachev, Vladimir P.; Yakimov, Boris P.; Gogoleva, Maria A.; Semenov, Alexey N.; Rodionov, Sergey A.; Novoselova, Marina V. et al.
System: The UNT Digital Library
Amplification of photoacoustic effect in bimodal polymer particles by self-quenching of indocyanine green (open access)

Amplification of photoacoustic effect in bimodal polymer particles by self-quenching of indocyanine green

This article presents a new type of bimodal contrast agent that is based on the self-quenching of indocyanine green (ICG) encapsulated in a biocompatible and biodegradable polymer shell.
Date: August 23, 2019
Creator: Mokrousov, Maksim D.; Novoselova, Marina V.; Nolan, Jackie; Harrington, Walter; Rudakovskaya, Polina; Bratashov, Daniil N. et al.
System: The UNT Digital Library
Absolute band alignment at semiconductor-water interfaces using explicit and implicit descriptions for liquid water (open access)

Absolute band alignment at semiconductor-water interfaces using explicit and implicit descriptions for liquid water

Article presents a rigorous and systematic study of the band alignment of semiconductors in aqueous solutions by contrasting a range of hybrid explicit/implicit models against explicit atomistic simulations based on density-functional theory.
Date: October 11, 2019
Creator: Hörmann, Nicolas; Guo, Zhendong; Ambrosio, Francesco; Andreussi, Oliviero; Pasquarello, Alfredo & Marzari, Nicola
System: The UNT Digital Library
Influence of coherent population trapping on Raman scattering (open access)

Influence of coherent population trapping on Raman scattering

Article considering the Raman scattering in molecular media. Applying two laser fields in a two-photon resonance with vibrational transition, the authors study the role of rotational levels for excitation of vibrational coherence. It is shown that the molecular vibrational coherence strongly depends on the effect of coherent population trapping for rotational levels. The obtained results are important for applications of Raman spectroscopy to molecular detection in engineering, chemical, and biological applications.
Date: August 8, 2019
Creator: Singh, Pooja; Rostovtsev, Yuri V.; Patnaik, Anil K.; Roy, Sukesh & Gord, James R.
System: The UNT Digital Library
Fe/GeTe(111) heterostructures as an avenue towards spintronics based on ferroelectric Rashba semiconductors (open access)

Fe/GeTe(111) heterostructures as an avenue towards spintronics based on ferroelectric Rashba semiconductors

Article investigating the electronic structure of Fe/GeTe(111), a prototypical ferromagnetic/Rashba-ferroelectric interface, by performing density functional theory and Green's functions calculations complemented by x-ray photoemission spectroscopy.
Date: February 19, 2019
Creator: Sławińska, Jagoda; Di Sante, Domenico; Varotto, Sara; Rinaldi, Christian & Picozzi, Silvia
System: The UNT Digital Library
Persistent spin helix in Rashba-Dresselhaus ferroelectric CsBiNb2O7 (open access)

Persistent spin helix in Rashba-Dresselhaus ferroelectric CsBiNb2O7

Article reporting that CsBiNb₂O₇, a layered perovskite of Dion-Jacobson type, is a robust ferroelectric with sufficiently strong spin-orbit coupling and spin texture reversible by electric field. The study reveals that its topmost valence band's spin texture is quasi-independent from the momentum, as a result of the low symmetry of its ferroelectric phase. The peculiar spin-polarization pattern in the momentum space may yield the so-called “persistent spin helix,” a specific spin-wave mode which protects the spin from decoherence in the diffusive transport regime, potentially ensuring a very long spin lifetime in this material.
Date: August 19, 2019
Creator: Sławińska, Jagoda; Autieri, Carmine; Barone, Paolo & Picozzi, Silvia
System: The UNT Digital Library
Electrically tunable, sustainable, and erasable broadband light absorption in graphene sandwiched in Al2O3 oxides (open access)

Electrically tunable, sustainable, and erasable broadband light absorption in graphene sandwiched in Al2O3 oxides

This article is a study of graphene as an electrically tunable material for switchable devices. Graphene is obtained from graphene oxide during the atomic layer deposition of Al2O3, as confirmed by Raman spectrum.
Date: November 15, 2018
Creator: Adewole, Murthada; Cui, Jingbiao; Lowell, David; Hassan, Safaa; Jiang, Yan; Singh, Abhay et al.
System: The UNT Digital Library
Absorption and emission modulation in a MoS2–GaN (0001) heterostructure by interface phonon–exciton coupling (open access)

Absorption and emission modulation in a MoS2–GaN (0001) heterostructure by interface phonon–exciton coupling

Article reporting the change in the transient absorption characteristics of monolayer MoS2 and the modified PL emission characteristics in a monolayer MoS2–GaN (0001) heterostructure due to the coupling of carriers with the phonon modes and the energy exchange at the interface. The results demonstrate the relevance of interface coupling between the semiconductors for the development of optical and electronic applications.
Date: September 26, 2019
Creator: Poudel, Yuba; Sławińska, Jagoda; Gopal, Priya; Seetharaman, Sairaman; Hennighausen, Zachariah; Kar, Swastik et al.
System: The UNT Digital Library
Grand canonical simulations of electrochemical interfaces in implicit solvation models (open access)

Grand canonical simulations of electrochemical interfaces in implicit solvation models

Article discussing grand canonical simulations based on density-functional theory to study the thermodynamic properties of electrochemical interfaces of metallic electrodes in aqueous environments.
Date: August 31, 2018
Creator: Hörmann, Nicolas; Andreussi, Oliviero & Marzari, Nicola
System: The UNT Digital Library
Lattice quantum magnetometry (open access)

Lattice quantum magnetometry

Article presenting the idea of lattice quantum magnetometry, i.e., quantum sensing of magnetic fields by a charged (spinless) particle placed on a finite two-dimensional lattice.
Date: June 24, 2019
Creator: Razzoli, Luca; Ghirardi, Luca; Siloi, Ilaria; Bordone, Paolo & Paris, Matteo G. A.
System: The UNT Digital Library
Edge-plasmon assisted electro-optical modulator (open access)

Edge-plasmon assisted electro-optical modulator

Article demonstrates an efficient electro-optical modulation by using an edge-plasmon mode specific for the hybrid plasmonic waveguide.
Date: November 26, 2019
Creator: Drachev, Vladimir P.; Pshenichnyuk, Ivan A.; Nazarikov, Gleb I.; Kosolobov, Sergey S. & Maimistov, Andrei I.
System: The UNT Digital Library
AFLOW-QHA3P: Robust and automated method to compute thermodynamic properties of solids (open access)

AFLOW-QHA3P: Robust and automated method to compute thermodynamic properties of solids

Article introducing the quasiharmonic approximation three-phonon method to calculate the thermodynamic properties of both nonmetallic and metallic compounds. This study demonstrates that QHA3P is an ideal framework for the high-throughput prediction of finite-temperature material properties, combining the accuracy of QHA with the computational efficiency of SC-QHA.
Date: July 8, 2019
Creator: Nath, Pinku; Usanmaz, Demet; Hicks, David; Oses, Corey; Fornari, Marco; Buongiorno Nardelli, Marco et al.
System: The UNT Digital Library
Broadband light-matter interaction due to resonance cavities in graded photonic super-crystals (open access)

Broadband light-matter interaction due to resonance cavities in graded photonic super-crystals

This article reports the formation of resonance cavities within graded photonic super-crystals (GPSCs) with unit cells formed via a near-uniform central region with eight side graded regions.
Date: August 29, 2019
Creator: Lin, Yuankun; Hassan, Safaa; Sale, Oliver; Alnasser, Khadijah; Hurley, Noah; Zhang, Hualiang et al.
System: The UNT Digital Library