208 citations · 772 across the 19 of their papers we have counts for
19 papers
Specular Inverse Faraday Effect in Transition Metals
Víctor H. Ortiz, Shashi B. Mishra, Luat Vuong +2
The inverse Faraday effect is an opto-magnetic phenomenon that describes the ability of circularly polarized light to induce magnetism in solids. The capability of light to control…
Optical and Acoustic Phonons in Turbostratic and Cubic Boron Nitride Thin Films on Diamond Substrates
Erick Guzman, Fariborz Kargar, Avani Patel +6
We report an investigation of the bulk optical, bulk acoustic, and surface acoustic phonons in thin films of turbostratic boron nitride (t-BN) and cubic boron nitride (c-BN) grown…
Excitation and Relaxation of Nonthermal Electron Energy Distributions in Metals with Application to Gold
D. M. Riffe, Richard B. Wilson
A semiempirical theory for the excitation and subsequent relaxation of nonthermal electrons is described. The theory, which is applicable to ultrafast-laser excited metals, is base…
Nanoscale laser flash measurements of diffuson transport in amorphous Ge and Si
Wanyue Peng, Richard Wilson
The thermal properties of amorphous materials have attracted significant attention due to their technological importance in electronic devices. Additionally, the disorder-induced b…
Thermal Model for Time-Domain Thermoreflectance Experiments in a Laser Flash Geometry
Wanyue Peng, Richard Wilson
Time-domain thermoreflectance (TDTR) is a well-established pump/probe method for measuring thermal conductivity and interface conductance of multilayers. Interpreting signals in a…
Thermal Conductivity of BAs under Pressure
Songrui Hou, Bo Sun, Fei Tian +7
The thermal conductivity of boron arsenide (BAs) is believed to be influenced by phonon scattering selection rules due to its special phonon dispersion. Compression of BAs leads to…
Magneto-optical Kerr spectra of gold induced by spin accumulation
Víctor H. Ortiz, Sinisa Coh, Richard B. Wilson
We report the magneto optic Kerr effect (MOKE) angle of Au magnetically excited by spin accumulation. We perform time resolved polar MOKE measurements on Au/Co heterostructures. In…
Electron-Phonon Scattering governs both Ultrafast and Precessional Magnetization Dynamics in Co-Fe Alloys
Ramya Mohan, Victor H. Ortiz, Luat Vuong +2
Recent investigations have advanced the understanding of how structure-property relationships in ferromagnetic metal alloys affect the magnetization dynamics on nanosecond time-sca…
Ultrafast Measurements of the Interfacial Spin Seebeck Effect in Au and Rare-Earth Iron Garnet Bilayers
Victor H. Ortiz, Michael J. Gomez, Yawen Liu +3
We investigate picosecond spin-currents across Au/iron-garnet interfaces in response to ultrafast laser heating of the electrons in the Au film. In the picoseconds after optical he…
Differentiating Contributions of Electrons and Phonons to the Thermoreflectance Spectra of Gold
Kexin Liu, Xinping Shi, Frank Angeles +4
To better understand the many effects of temperature on the optical properties of metals, we experimentally and theoretically quantify the electron vs. phonon contributions to the…
Electric field control of phonon angular momentum in perovskite BaTiO
Kevin Moseni, Richard B Wilson, Sinisa Coh
We find that in BaTiO the phonon angular momentum is dominantly pointing in directions perpendicular to the electrical polarization. Therefore, external electric field in ferro…
Unifying femtosecond and picosecond single-pulse magnetic switching in GdFeCo
Florian Jakobs, Thomas Ostler, Charles-Henri Lambert +6
Many questions are still open regarding the physical mechanisms behind the magnetic switching in GdFeCo alloys by single optical pulses. Phenomenological models suggest a femtoseco…
Picosecond Spin Orbit Torque Switching
Kaushalya Jhuria, Julius Hohlfeld, Akshay Pattabi +13
Reducing energy dissipation while increasing speed in computation and memory is a long-standing challenge for spintronics research. In the last 20 years, femtosecond lasers have em…
Phonon and Thermal Properties of Quasi-Two-Dimensional FePS3 and MnPS3 Antiferromagnetic Semiconductor Materials
Fariborz Kargar, Ece Aytan, Subhajit Ghosh +9
We report results of investigation of the phonon and thermal properties of the exfoliated films of layered single crystals of antiferromagnetic FePS3 and MnPS3 semiconductors. The…
Parametric dependence of hot electron relaxation timescales on electron-electron and electron-phonon interaction strengths
Richard Wilson, Sinisa Coh
Understanding how photoexcited electron dynamics depend on electron-electron (e-e) and electron-phonon (e-p) interaction strengths is important for many fields, e.g. ultrafast magn…
Single shot ultrafast all optical magnetization switching of ferromagnetic Co/Pt multilayers
Jon Gorchon, Charles-Henri Lambert, Yang Yang +4
In a number of recent experiments, it has been shown that femtosecond laser pulses can control magnetization on picosecond timescales, which is at least an order of magnitude faste…
Ultrafast Magnetization Reversal by Picosecond Electrical Pulses
Yang Yang, R. B. Wilson, Jon Gorchon +3
The field of spintronics involves the study of both spin and charge transport in solid state devices with a view toward increasing their functionality and efficiency. Alternatively…
Electron-phonon interaction during optically induced ultrafast magnetization dynamics of Au/GdFeCo bilayers
Richard B Wilson, Charles-Henri Lambert, Jon Gorchon +3
The temperature evolution of GdFeCo electrons following optical heating plays a key role in all optical switching of GdFeCo and is primarily governed by the strength of coupling be…
The role of electron and phonon temperatures in the helicity-independent all-optical switching of GdFeCo
Jon Gorchon, Richard B. Wilson, Yang Yang +6
Ultrafast optical heating of the electrons in ferrimagnetic metals can result in all-optical switching (AOS) of the magnetization. Here we report quantitative measurements of the t…