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Single shot acquisition of spatially resolved spin wave dispersion relations using X-ray microscopy

Publications associées (35)

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Bounding the Polynomial Approximation Errors of Frequency Response Functions

Zlatko Emedi

Frequency response function (FRF) measurements take a central place in the instrumentation and measurement field because many measurement problems boil down to the character- ization of a linear dynamic behavior. The major problems to be faced are leakage ...

Ieee-Inst Electrical Electronics Engineers Inc2013

Revisiting Microstructure Sensor Responses with Implications for Double-Diffusive Fluxes

Alfred Johny Wüest, Martin Schmid

Thin high-gradient interfaces that occur naturally within double-diffusive staircases are used to estimate the response characteristics of temperature and conductivity microstructure sensors. The knowledge of these responses is essential for resolving smal ...

Amer Meteorological Soc2013

Bounding the Polynomial Approximation Errors of Frequency Response Functions

Zlatko Emedi

Frequency response function (FRF) measurements take a central place in the instrumentation and measurement field because many measurement problems boil down to the characterization of a linear dynamic behavior. The major problems to be faced are leakage an ...

Ieee-Inst Electrical Electronics Engineers Inc2013

Nanostripe of subwavelength width as a switchable semitransparent mirror for spin waves in a magnonic crystal

Dirk Grundler

Spin wave transmission experiments are performed on a one-dimensional magnonic crystal (MC) where an injection pad for domain walls reverses the magnetization M of selected nanostripes independently from the otherwise saturated MC. The MC consists of a per ...

2013

Omnidirectional spin-wave nanograting coupler

Dirk Grundler, Haiming Yu

Magnonics as an emerging nanotechnology offers functionalities beyond current semiconductor technology. Spin waves used in cellular nonlinear networks are expected to speed up technologically, demanding tasks such as image processing and speech recognition ...

2013

Ferromagnetic nanodisks for magnonic crystals and waveguides

Dirk Grundler

Spin wave excitations in dipolarly coupled nanodisks from permalloy are investigated. We address, both, onedimensional (1D) chains and two-dimensional (2D) arrays consisting of nanodisks of different diameter. An out-of-plane magnetic field allows us to in ...

2011

Field- and geometry-controlled avoided crossings of spin-wave modes in reprogrammable magnonic crystals

Dirk Grundler

We study the spin dynamics in arrays of densely packed submicron Ni80Fe20 wires which form one-dimensional magnonic crystals. They are subject to an in-plane magnetic field H being collinear with the wires. In the case when neighboring wires are magnetized ...

2011

Diffractionless Fourier Domain Microscopy

Theo Lasser, Rainer Leitgeb, Cédric Blatter, Tilman Schmoll

Several methods have been proposed and realized to increase the lateral resolution in microscopy and ultimately to beat the actual diffraction limit as stated by Abbe. Structured illumination for example enhances the lateral resolution by virtually extendi ...

2011

Signal Processing in Space and Time

Francisco Pereira Correia Pinto

Sound waves propagate through space and time by transference of energy between the particles in the medium, which vibrate according to the oscillation patterns of the waves. These vibrations can be captured by a microphone and translated into a digital sig ...

EPFL2010

Learning Sparse Systems at Sub-Nyquist Rates: A Frequency-Domain Approach

Martin Vetterli, Yue Lu

We propose a novel algorithm for sparse system identification in the frequency domain. Key to our result is the observation that the Fourier transform of the sparse impulse response is a simple sum of complex exponentials, whose parameters can be efficient ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010