A New Design of Resonant Cavity for the W-band EPR spectrometer

• URL: http://arxiv.org/abs/2112.11807v1
• Date: Wed, 22 Dec 2021 11:28:21 GMT
• Title: A New Design of Resonant Cavity for the W-band EPR spectrometer
• Abstract summary: cavity operates on the TE$_011$ mode, where the microwave magnetic field is along the cylindrical axis. By rotating the cavity, the microwave magnetic field can also be perpendicular to a horizontal external field when a split-pair magnet is used.
• Score: 10.523235305485548
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We report a new design of resonant cavity for W-band EPR spectrometer. It suits with both solenoid-type and split-pair magnets. The cavity operates on the TE$_{011}$ mode, where the microwave magnetic field is along the cylindrical axis. Its cylindrical axis is horizontal, so the magnetic field of the microwave is always perpendicular to the vertical external magnetic field provided by a solenoid-type magnet. By rotating the cavity, the microwave magnetic field can also be perpendicular to a horizontal external field when a split-pair magnet is used. Furthermore, a tiny metal cylinder allows for the adjustment of coupling. This enables both continuous-wave (CW) and pulsed EPR experiments. The coupling-varying ability has been demonstrated by reflection coefficient (S11) measurement, and CW and pulsed EPR experiments have been conducted. The performance data indicates a prospect of wide applications of the cavity in the fields of physics, chemistry and biology.

Related papers

• Using NV centers in diamond to detect DC to very-low frequency magnetic fields [0.0]
  We present a compact and portable tabletop magnetometer that utilizes negatively charged nitrogen-vacancy centers in diamond.<n>The experimentally measured magnetic field noise-floor is $approx 2.3textrmnTsqrttextrmHz$ while the calculated shot-noise-limited magnetic field sensitivity is $approx 585textrmpTsqrttextrmHz$ when excited with a continuous wave laser at 0.5W.
  arXiv  Detail & Related papers  (2025-12-30T14:57:37Z)
• Searching for axion dark matter with magnetic resonance force microscopy [0.1499944454332829]
  We propose a magnetic resonance force microscopy (MRFM) search for axion dark matter around 1 GHz.<n>Experiment leverages the axion's derivative coupling to electrons, which induces an effective A.C. magnetic field on a sample of electron spins polarized by a D.C. magnetic field and a micromagnet.<n>We show that current technology can be used to put constraints competitive with those from laboratory experiments with just a minute of integration time.
  arXiv  Detail & Related papers  (2025-12-13T01:21:35Z)
• Robust AC vector sensing at zero magnetic field with pentacene [45.7221176995052]
  Quantum sensors based on electronic spins have emerged as powerful probes of microwave-frequency fields.<n>Here, we demonstrate microwave vector magnetometry using the photoexcited spin triplet of pentacene molecules.
  arXiv  Detail & Related papers  (2025-12-06T03:49:12Z)
• Imaging of microwave magnetic field orientation using continuous-wave experiments on nitrogen-vacancy centers in diamond [0.0]
  nitrogen-vacancy (NV) centers in diamond are highly suitable for imaging dc and ac magnetic fields.<n>We demonstrate imaging of the orientation of microwave magnetic fields by only using continuous-wave experiments on NV centers.<n>We also demonstrate that the projection of the microwave fields onto a plane can be imaged using NV centers of single orientation.
  arXiv  Detail & Related papers  (2025-06-21T12:04:02Z)
• Generalized Gouy Rotation of Electron Vortex beams in uniform magnetic fields [54.010858975226945]
  We study the dynamics of EVBs in magnetic fields using exact solutions of the relativistic paraxial equation in magnetic fields. We provide a unified description of different regimes under generalized Gouy rotation, linking the Gouy phase to EVB rotation angles. This work offers new insights into the dynamics of EVBs in magnetic fields and suggests practical applications in beam manipulation and beam optics of vortex particles.
  arXiv  Detail & Related papers  (2024-07-03T03:29:56Z)
• Microscale Fiber-Integrated Vector Magnetometer with On-Tip Field Biasing using NV Ensembles in Diamond Microcystals [0.0]
  In quantum sensing of magnetic fields, ensembles of nitrogen-vacancy centers in diamond offer high sensitivity, high bandwidth and outstanding spatial resolution. We present a novel approach that utilizes a fiber-integrated microscale coil at the fiber tip to generate a localized uniaxial magnetic field. We demonstrate the measurement of vector magnetic fields in the full solid angle with a shot-noise limited sensitivity of $19.4:textrmnT/Hz1/2$ and microscale spatial resolution.
  arXiv  Detail & Related papers  (2024-04-22T11:20:10Z)
• Scanning spin probe based on magnonic vortex quantum cavities [0.0]
  We propose the realization of a nanoscale scanning electron paramagnetic resonance sensor using a vortex core in a thin-film disc. The vortex core can be displaced by using external magnetic fields of a few mT, enabling EPR scanning microscopy with large spatial resolution. Vortex nanocavities could also attain strong coupling to individual spin molecular qubits, with potential applications to mediate qubit-qubit interactions.
  arXiv  Detail & Related papers  (2024-01-12T12:53:49Z)
• Variable bandwidth, high efficiency microwave resonator for control of spin-qubits in nitrogen-vacancy centers [0.0]
  Nitrogen-Vacancy (NV) centers in diamond are attractive tools for sensing and quantum information. We present a planar microwave resonator optimized for microwave-optical double resonance experiments.
  arXiv  Detail & Related papers  (2023-01-10T11:26:42Z)
• Measuring the magnon-photon coupling in shaped ferromagnets: tuning of the resonance frequency [50.591267188664666]
  cavity photons and ferromagnetic spins excitations can exchange information coherently in hybrid architectures. Speed enhancement is usually achieved by optimizing the geometry of the electromagnetic cavity. We show that the geometry of the ferromagnet plays also an important role, by setting the fundamental frequency of the magnonic resonator.
  arXiv  Detail & Related papers  (2022-07-08T11:28:31Z)
• Multi-Center Magnon Excitations Open the Entire Brillouin Zone to Terahertz Magnetometry of Quantum Magnets [42.72559625804617]
  The magnon density of states can be accessed over the entire Brillouin zone through three-center magnon excitations. The results of THz time-domain experiments agree remarkably well with linear spin-wave theory.
  arXiv  Detail & Related papers  (2022-03-08T19:04:24Z)
• Magnetic and geometric effects on the electronic transport of metallic nanotubes [122.46389612035273]
  We present a numerical study of the electronic transport properties of metallic nanotubes deviating from the cylindrical form. It is found that the nanotube may be used as an energy high-pass filter for electrons. It is also shown that the device can be used to tune the angular momentum of transmitted electrons.
  arXiv  Detail & Related papers  (2021-01-11T16:58:42Z)
• Ferromagnetic Gyroscopes for Tests of Fundamental Physics [49.853792068336034]
  A ferromagnetic gyroscope (FG) is a ferromagnet whose angular momentum is dominated by electron spin polarization and that will precess under the action of an external torque. We model and analyze FG dynamics and sensitivity, focusing on practical schemes for experimental realization.
  arXiv  Detail & Related papers  (2020-10-17T07:13:50Z)
• Mapping the stray fields of a nanomagnet using spin qubits in SiC [0.0]
  We report the use of optically addressable spin qubits in SiC to probe the magnetic stray fields generated by a ferromagnetic microstructure lithographically patterned on the surface of a SiC crystal. The spin resonance is driven by a micrometer-sized microwave antenna patterned adjacent to the magnetic element.
  arXiv  Detail & Related papers  (2020-09-01T11:03:36Z)
• Cavity-enhanced magnetometer with a spinor Bose-Einstein condensate [0.0]
  The sensitivity of the proposed magnetometer exhibits Heisenberg-like scaling with respect to the atom number. We calculate the lower bound on the sensitivity of such a magnetometer to be of the order of fT/$sqrtmathrmHz$--pT/$sqrtmathrmHz$ for a condensate of $104$ atoms with coherence times of the order of several ms.
  arXiv  Detail & Related papers  (2020-08-17T12:20:05Z)
• Gravity Probe Spin: Prospects for measuring general-relativistic precession of intrinsic spin using a ferromagnetic gyroscope [51.51258642763384]
  An experimental test at the intersection of quantum physics and general relativity is proposed. The behavior of intrinsic spin in spacetime is an experimentally open question. A measurement is possible by using mm-scale ferromagnetic gyroscopes in orbit around the Earth.
  arXiv  Detail & Related papers  (2020-06-16T17:18:44Z)
• Optimal coupling of HoW$_{10}$ molecular magnets to superconducting circuits near spin clock transitions [85.83811987257297]
  We study the coupling of pure and magnetically diluted crystals of HoW$_10$ magnetic clusters to microwave superconducting coplanar waveguides. Results show that engineering spin-clock states of molecular systems offers a promising strategy to combine sizeable spin-photon interactions with a sufficient isolation from unwanted magnetic noise sources.
  arXiv  Detail & Related papers  (2019-11-18T11:03:06Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.