Topics

Terahertz Vortex Beam as a Spectroscopic Probe of Magnetic Excitations.

08:00 EDT 14th June 2019 | BioPortfolio

Summary of "Terahertz Vortex Beam as a Spectroscopic Probe of Magnetic Excitations."

Circularly polarized light with spin angular momentum is one of the most valuable probes of magnetism. We demonstrate that light beams with orbital angular momentum (OAM), or vortex beams, can also couple to magnetism exhibiting dichroisms in a magnetized medium. Resonant optical absorption in a ferrimagnetic crystal depends strongly on both the handedness of the vortex and the direction of the beam propagation with respect to the sample magnetization. This effect exceeds the conventional dichroism for circularly polarized light. Our results demonstrate the high potential of the vortex beams with OAM as a new spectroscopic probe of magnetism in matter.

Affiliation

Journal Details

This article was published in the following journal.

Name: Physical review letters
ISSN: 1079-7114
Pages: 237401

Links

DeepDyve research library

PubMed Articles [7160 Associated PubMed Articles listed on BioPortfolio]

Proposal for Measuring Magnetism with Patterned Apertures in a Transmission Electron Microscope.

We propose a magnetic measurement method utilizing a patterned postsample aperture in a transmission electron microscope. While utilizing electron magnetic circular dichroism, the method circumvents p...

Vortex avalanche in the perturbed singular beams.

We have theoretically and experimentally considered transforming a single optical vortex beam into the vortex avalanche caused by weak local perturbations of the holographic grating responsible for th...

Measuring the topological charge of optical vortices with a twisting phase.

We analyzed the propagation characteristics of the intensity of a vortex beam after it passes through a twisting phase. It was found that the doughnut-like intensity pattern of a vortex beam would sep...

Nonparaxial propagation of vector vortex beams diffracted by a circular aperture.

In terms of the vectorial Rayleigh-Sommerfeld diffraction integral, the analytical expressions of the arbitrary vector vortex Laguerre-Gaussian beams on the higher-order Poincaré sphere diffracted by...

Preferred Magnetic Excitations in the Iron-Based Sr_{1-x}Na_{x}Fe_{2}As_{2} Superconductor.

With spin-orbit coupling, both local-moment magnetism and itinerant electrons are expected to behave anisotropically in spin space, but such effects' influence on the formation of unconventional super...

Clinical Trials [3628 Associated Clinical Trials listed on BioPortfolio]

Optimization of Spectroscopic Imaging Parameters and Procedures for Prostate at 3 Tesla Using an External Probe

Magnetic resonance (MR) spectroscopic techniques are to be developed to obtain the best data possible at 3 Tesla (3T) for the prostate.

Magnetic Resonance Imaging and Magnetic Resonance Spectroscopic Imaging in Evaluating Patients Who Are Undergoing Treatment for Gliomas

RATIONALE: Diagnostic procedures, such as magnetic resonance imaging (MRI) and magnetic resonance spectroscopic imaging (MRSI), (done before, during, and after treatment) may help doctors ...

Magnetic Resonance Spectroscopic Imaging of the Prostate at 3 Tesla

The purpose of this study is to determine the benefits of Magnetic Resonance Imaging (MRI) combined with Magnetic Resonance Spectroscopic Imaging (MRSI), on an instrument called a 3.0 Tes...

Magnetic Resonance Imaging and Magnetic Resonance Spectroscopic Imaging in Diagnosing the Extent of Disease in Patients With Prostate Cancer

RATIONALE: Imaging procedures such as magnetic resonance imaging (MRI) and magnetic resonance spectroscopic imaging (MRSI) may improve the ability to detect the extent of prostate cancer. ...

Hyperpolarized Carbon C 13 Pyruvate Magnetic Resonance Spectroscopic Imaging in Predicting Treatment Response in Participants With Prostate Cancer

This phase II trial studies how well hyperpolarized carbon C 13 pyruvate magnetic resonance spectroscopic imaging works in predicting treatment response in participants with prostate cance...

Medical and Biotech [MESH] Definitions

The visualization of internal structure using TERAHERTZ RADIATION technologies.

Spectrum analysis of absorbed or emitted TERAHERTZ RADIATION.

Spectroscopic method of measuring the magnetic moment of elementary particles such as atomic nuclei, protons or electrons. It is employed in clinical applications such as NMR Tomography (MAGNETIC RESONANCE IMAGING).

The use of instrumentation and techniques for visualizing material and details that cannot be seen by the unaided eye. It is usually done by enlarging images, transmitted by light or electron beams, with optical or magnetic lenses that magnify the entire image field. With scanning microscopy, images are generated by collecting output from the specimen in a point-by-point fashion, on a magnified scale, as it is scanned by a narrow beam of light or electrons, a laser, a conductive probe, or a topographical probe.

Non-ionizing electromagnetic energy in the frequency range of 100 gigahertz to 10 terahertz which spans from the mid-INFRARED RAYS frequency to the high-frequency edge of the MICROWAVES band.

Quick Search


DeepDyve research library

Searches Linking to this Article