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Results: 61
Femtosecond formation dynamics of the spin Seebeck effect revealed by terahertz spectroscopy.
Tom S Seifert, Samridh Jaiswal, Joseph Barker, Sebastian T Weber, Ilya Razdolski, Joel Cramer, Oliver Gueckstock, Sebastian F Maehrlein, Lukas Nadvornik, Shun Watanabe, Chiara Ciccarelli, Alexey Melnikov, Gerhard Jakob, Markus Münzenberg, Sebastian TB Goennenwein, Georg Woltersdorf, Baerbel Rethfeld, Piet W Brouwer, Martin Wolf, Mathias Kläui, Tobias Kampfrath
Mar 06, 2019
Understanding the transfer of spin angular momentum is essential in modern magnetism research. A model case is the generation of magnons in magnetic insulators by heating an adjacent metal film. Here, we reveal the initial steps...
Nuclear Magnetic Resonance Spectroscopy as a Dynamical Structural Probe of Hydrogen under High Pressure.
An unambiguous crystallographic structure solution for the observed phases II-VI of high pressure hydrogen does not exist due to the failure of standard structural probes at extreme pressure. In this work we propose that nuclear...
On-chip measurements of protein unfolding from direct observations of micron-scale diffusion.
Yuewen Zhang, Emma V Yates, Liu Hong, Kadi L Saar, Georg Meisl, Christopher M Dobson, Tuomas PJ Knowles
May 16, 2018
Investigations of protein folding, unfolding and stability are critical for the understanding of the molecular basis of biological structure and function. We describe here a microfluidic approach to probe the unfolding of...
Wide-Field Detected Fourier Transform CARS Microscopy.
We present a wide-field imaging implementation of Fourier transform coherent anti-Stokes Raman scattering (wide-field detected FT-CARS) microscopy capable of acquiring high-contrast label-free but chemically specific images over...
Pulse control protocols for preserving coherence in dipolar-coupled nuclear spin baths.
AM Waeber, G Gillard, G Ragunathan, M Hopkinson, P Spencer, DA Ritchie, MS Skolnick, EA Chekhovich
Jul 17, 2020
Coherence of solid state spin qubits is limited by decoherence and random fluctuations in the spin bath environment. Here we develop spin bath control sequences which simultaneously suppress the fluctuations arising from...
Energy and Electron Transfer Dynamics within a Series of Perylene Diimide/Cyclophane Systems.
Seán TJ Ryan, Ryan M Young, James J Henkelis, Nema Hafezi, Nicolaas A Vermeulen, Andreas Hennig, Edward J Dale, Yilei Wu, Matthew D Krzyaniak, Athan Fox, Werner M Nau, Michael R Wasielewski, J Fraser Stoddart, Oren A Scherman
Apr 29, 2016
A concept for single-shot volumetric fluorescence imaging via orthogonally polarized excitation lattices.
The deconvolution of widefield fluorescence images provides only guesses of spatial frequency information along the optical axis due to the so called missing cone in the optical transfer function. Retaining the single-shot...
Quantitative evaluation of comb-structure correction methods for multispectral fibrescopic imaging.
Removing the comb artifact introduced by imaging fibre bundles, or 'fibrescopes', for example in medical endoscopy, is essential to provide high quality images to the observer. Multispectral imaging (MSI) is an emerging method...
Coherent Spin Amplification Using a Beam Splitter.
Chengyu Yan, Sanjeev Kumar, Kalarikad Thomas, Patrick See, Ian Farrer, David Ritchie, Jonathan Griffiths, Geraint Jones, Michael Pepper
Mar 05, 2019
We report spin amplification using a capacitive beam splitter in n-type GaAs where the spin polarization is monitored via a transverse electron focusing measurement. It is shown that partially spin-polarized current injected by...
Unlocking Structure-Self-Assembly Relationships in Cationic Azobenzene Photosurfactants.
Azobenzene photosurfactants are light-responsive amphiphiles that have garnered significant attention for diverse applications including delivery and sorting systems, phase transfer catalysis, and foam drainage. The azobenzene...
Improved methodology for performing the inverse Abel transform of flame images for color ratio pyrometry.
Jochen AH Dreyer, Radomir I Slavchov, Eric J Rees, Jethro Akroyd, Maurin Salamanca, Sebastian Mosbach, Markus Kraft
Apr 05, 2019
A new method is presented for performing the Abel inversion by fitting the line-of-sight projection of a predefined intensity distribution (FLiPPID) to the recorded 2D projections. The aim is to develop a methodology that is...
Effect of stray fields on Rydberg states in hollow-core PCF probed by higher-order modes.
The spectroscopy of atomic gases confined in hollow-core photonic crystal fiber (HC-PCF) provides optimal atom-light coupling beyond the diffraction limit, which is desirable for various applications such as sensing...
Continuous-wave highly-efficient low-divergence terahertz wire lasers.
Simone Biasco, Katia Garrasi, Fabrizio Castellano, Lianhe Li, Harvey E Beere, David A Ritchie, Edmund H Linfield, A Giles Davies, Miriam S Vitiello
Sep 20, 2018
Terahertz (THz) quantum cascade lasers (QCLs) have undergone rapid development since their demonstration, showing high power, broad-tunability, quantum-limited linewidth, and ultra-broadband gain. Typically, to address...
Quantum dot spin coherence governed by a strained nuclear environment.
The interaction between a confined electron and the nuclei of an optically active quantum dot provides a uniquely rich manifestation of the central spin problem. Coherent qubit control combines with an ultrafast spin-photon...
Aryl-viologen pentapeptide self-assembled conductive nanofibers.
David E Clarke, Magdalena Olesińska, Tobias Mönch, Ben Schoenaers, Andre Stesmans, Oren A Scherman
Jun 05, 2019
Maximizing the field of view and accuracy in 3D Single Molecule Localization Microscopy.
Super-resolution techniques that localize single molecules in three dimensions through point spread function (PSF) engineering are very sensitive to aberrations and optical alignment. Here we show how double-helix point spread...
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