In recent years, nanoprobe-based devices have attracted significant attention and found a wide range of applications, including nanostructure imaging, single molecular detection, and physical, chemical, and biological sensing applications. However, since the scale of nanodevices is substantially less than the optical diffraction limit, their fabrication remains a difficult challenge. Despite si...

The customary defocussed and Foucault modes of Lorentz microscopyare usually described in terms of geometric optics. Wohlleben has shown that geometric optics has a restricted range of validity, however; a more fundamental approach is provided by wave optics. The defocussed and Foucault modes may be discussed in terms of wave optics, and for the defocussed mode it can be shown explicitly that t...

Experimental measurements are presented for sub-scale ion optics systems comprised of 7 and 19 aperture pairs with geometrical features that are similar to the HiPEP ion optics system under development within NASA's Project Prometheus. Effects of hole diameter and grid-to-grid spacing are presented as functions of applied voltage and beamlet current. Recommendations are made for the beamlet cur...

Single-electron sources are vital for modern nanoelectronics, enabling advances in the emerging field of electron quantum optics. However, their performance is limited by current method generating single electrons applying Lorentzian voltage pulses on Fermi sea a conductor. The authors introduce Fourier synthesis-based pulse generator, allowing generation and in-situ characterization 27-ps wave...

The strong interaction of electrons with small volumes of matter make them an ideal probe for nanomaterials, but our ability to fully use this signal in electron microscopes remains limited by lens aberrations. To bring this unique advantage to bear on materials research requires a sample space for electron scattering experiments in a tunable electron-optical environment. This is the vision for...

Department of Physics, Graduate School of Science, University of Tokyo, Tokyo, Japan Department of Physics, Faculty of Science, Tokyo University of Science, Tokyo, Japan Danish National Research Foundation Center for Quantum Optics, Department of Physics and Astronomy, University of Aarhus, DK-800 Århus C, Denmark ‡ Electron and Optical Physics Division, National Institute of Standards and Tech...

Characteristics of a scintillation proportional counter with WLS fiber optics readout is described. The possibility of detection of the proportional scintillation signal produced by the single electron of primary ionization is shown. The counter can be applied for the experiments in ”low–background” physics which require a low energy threshold. E-mail : akimov [email protected]