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Related papers: Terahertz-Driven Phonon Upconversion in SrTiO3

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Phonon polaritons (PhPs), excitations arising from the coupling of light with lattice vibrations, enable light confinement and local field enhancement, which is essential for various photonic and thermal applications. To date, PhPs with…

Recent advances in ultrashort laser pulse techniques have opened up a wide variety of applications in both fundamental physics and industrial fields. In this work, $ab$ $initio$ molecular dynamics simulations based on time-dependent density…

Mesoscale and Nanoscale Physics · Physics 2019-08-21 Hiroki Katow , Yoshiyuki Miyamoto

A comparative analysis of the structural phase transitions of EuTiO3 and SrTiO3 (at TS = 282 and 105 K, respectively) is made on the basis of phonon-dispersion and density functional calculations. The phase transition of EuTiO3 is predicted…

Other Condensed Matter · Physics 2015-05-30 Jerry L. Bettis , Myung-Hwan Whangbo , Jürgen Köhler , Annette Bussmann-Holder , A. R. Bishop

We measure the anisotropic mid-infrared response of electrons and phonons in bulk YBa2Cu3O7 after femtosecond photoexcitation. A line shape analysis of specific lattice modes reveals their transient occupation and coupling to the…

Superconductivity · Physics 2010-08-04 A. Pashkin , M. Porer , M. Beyer , K. W. Kim , A. Dubroka , C. Bernhard , X. Yao , Y. Dagan , R. Hackl , A. Erb , J. Demsar , R. Huber , A. Leitenstorfer

Achieving simultaneous lasing of photons and phonons in optomechanical setups has great potential for applications in quantum information processing, high precision sensing and the design of hybrid photonic-phononic devices. Here, we…

Quantum Physics · Physics 2025-04-25 Vitalie Eremeev , Hugo Molinares , Luis A. Correa , Bing He

We report the direct observation of a "resonance" mode in the lowest-energy optic phonon very near the zone center around (111) in the multiferroic BiFeO$_3$ using neutron scattering methods. The phonon scattering intensity is enhanced when…

Controlling light polarization is one of the most essential routines in modern optical technology. Since the demonstration of optical pulse shaping by spatial light modulators and its potential in controlling the quantum reaction pathways,…

We develop a method for mapping the anharmonic lattice potential using the time-dependent electric field of the transmitted pulse through thin sample supported by a substrate of non-negligible thickness. Assuming linear propagation in the…

Optics · Physics 2018-02-14 C. Korpa , Gy. Toth , J. Hebling

Strong-field terahertz (THz) excitations enable dynamic control over electronic, lattice and symmetry degrees of freedom in quantum materials. Here, we uncover pronounced terahertz-induced symmetry modulations and coherent phonon dynamics…

We demonstrate semiconductor superlattices or nanocavities as narrow band acoustic transducers in the sub-terahertz range. Using picosecond ultrasonics experiments in the transmission geometry with pump and probe incident on opposite sides…

Nonlinear phononics holds the promise for controlling properties of quantum materials on the ultrashort timescale. Using nonequilibrium dynamical mean-field theory, we solve a model for the description of organic solids, where correlated…

Strongly Correlated Electrons · Physics 2021-01-27 Francesco Grandi , Jiajun Li , Martin Eckstein

Entropy transfer in metal halide perovskites, characterized by significant lattice anharmonicity and low stiffness, underlies the remarkable properties observed in their optoelectronic applications, ranging from solar cells to lasers. The…

Materials Science · Physics 2024-07-01 Z. Liu , Y. Shi , T. Jiang , L. Luo , C. Huang , M. Mootz , Z. Song , Y. Yan , Y. Yao , J. Zhao , J. Wang

[Fe(phen)2(NCS)2] is a prototype transition metal complex material, which undergoes a phase transition between low-spin (LS) and high-spin (HS) phases, induced by temperature, pressure or light. Vibrational modes play a key role for…

The influence of laser frequency on laser-driven ion acceleration is investigated by means of two-dimensional particle-in-cell simulations. When ultrashort intense laser pulse at higher harmonic frequency irradiates a thin solid foil, the…

Plasma Physics · Physics 2014-07-29 Jan Psikal , Ondrej Klimo , Stefan Weber , Daniele Margarone

In this study, we present a comprehensive analysis of the Raman active phonon modes in orthorhombic LaInO$_3$ based on a combination of polarization-angle resolved Raman spectroscopy and density functional theory calculations. By using…

Hybrid lattice-light modes, known as phonon-polaritons, represent the backbone of advanced protocols based on THz pumping of infrared modes. Here we provide a theoretical framework able to capture the different roles played by…

Materials Science · Physics 2025-05-02 Niccolò Sellati , Jacopo Fiore , Stefano Paolo Villani , Lara Benfatto , Mattia Udina

The interaction of a single-cycle THz electric field with the topological insulator $\mathrm{MnBi}_2\mathrm{Te}_4$ triggers strongly anharmonic lattice dynamics, promoting fully coherent energy transfer between the otherwise non-interacting…

Lattice vibration in solids may carry angular momentum. But unlike the intrinsic spin of electrons, the lattice vibration is rarely rotational. To induce angular momentum, one needs to find a material that can accommodate a twisted normal…

Materials Science · Physics 2021-09-29 G. P. Zhang , Y. H. Bai , Thomas F. George

The interfacial electronic properties of complex oxides are governed by a delicate balance between charge transfer, lattice distortions, and electronic correlations, posing a key challenge for controlled tunability in materials research.…

Materials Science · Physics 2025-11-05 Haidong Liang , Ganesh Ji Omar , Kun Han , Andrew A. Bettiol , Zhen Huang , A. Ariando

Light offers a route to engineer new phases of matter far from equilibrium, including transient states suggestive of superconducting, charge-ordered, and excitonic ordering behavior. Yet it remains unclear how optical excitation can…

Superconductivity · Physics 2025-09-09 Mattia Moroder , Sebastian Paeckel , Matteo Mitrano , John Sous
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