Results 221 to 230 of about 36,463 (262)
Some of the next articles are maybe not open access.
New approaches for enhancements on transmission of electromagnetic signals
2017 25th Signal Processing and Communications Applications Conference (SIU), 2017In this study, frequently encountered unwanted parasitic or noise signals during the transmission of electromagnetic signals are tried to be reduced by a new approach is proposed. By this method, the mentioned noise effect between the near transmitter-receiver or two reciprocal antennas, is aimed to be eliminated.
Musa Bute +2 more
openaire +2 more sources
Field Enhancement with Classical Electromagnetically Induced Transparency
2014A key challenge in the design of tunable and nonlinear metamaterials is creating large local electromagnetic fields to enhance the nonlinear interaction. An attractive way to achieve local field enhancement is the use of metamaterials with dark resonators, i.e., with meta-atoms that do not directly couple to the external field.
Tassin, Philippe +2 more
openaire +2 more sources
Finding electromagnetic and chemical enhancement factors of surface-enhanced Raman scattering
Optics Letters, 2007The authors report two methods to determine electromagnetic and chemical enhancement factors in surface-enhanced Raman scattering (SERS), which are based on saturation property and decay dynamics of photoluminescence and concurrent measurements of photoluminescence and resonance Raman scattering intensities.
Mykhaylo M, Dvoynenko, Juen-Kai, Wang
openaire +2 more sources
Electromagnetic field enhancement in TERS configurations
Journal of Raman Spectroscopy, 2009AbstractWe use three‐dimensional finite‐difference time domain (3D‐FDTD) simulations to investigate the field enhancement properties of tip‐enhanced Raman scattering (TERS) in order to find optimal geometric parameters of the metal tip and the metal substrate under certain excitation wavelengths with side illumination.
Javier Aizpurua +2 more
exaly +4 more sources
Surface-Enhanced Electromagnetic Processes
1984Publisher Summary The chapter presents a study on surface- enhanced electromagnetic processes. The chapter discusses evidence that an electromagnetic mechanism involving localized surface plasmons provides a very important contribution to the enhancement.
openaire +1 more source
Electromagnetic Raman Enhancement Beyond Gap Limit
Physical Review LettersSurface-enhanced Raman scattering is of great importance to trace-level detection with fingerprint information of analytes. However, there is no room for electric dipole enhancement mechanism to further improve the enhancement factor and detect macromolecules. Here, we break the limits by electric multipoles with anapole states, as well as bound states
Qi-hang Zhang +8 more
openaire +2 more sources
Molecules enhanced by electromagnetic fields
2018Bretislav Friedrich, Dudley Herschbach, Sabre Kais and Burkhard Schmidt show that molecules enhanced by electromagnetic fields gain new ...
Friedrich, B. +3 more
openaire +1 more source
Electromagnetically Enhanced Filtration of Aluminum Melts
2011The major drawback of the use of Ceramic Foam Filters (CFF) for purification of aluminum is their low efficiency for particles in the range of 10–30 μm. The application of electromagnetic force from an induction coil in combination with a filter can cause back mixing and recirculation through the filter media. In the present work an experimental set-up
Mark William Kennedy +3 more
openaire +1 more source
Enhancing electromagnetism experiments with clamp-on ammeters
American Journal of Physics, 2001Experiments designed to illustrate the principles embodied in Ampere’s Law and Faraday’s Law often depend on the knowledge of the number of turns of wire on various types of laboratory coils. The lack of direct measurement of this parameter can be overcome with the use of inexpensive (<$85) digital clamp-on ammeters.
openaire +1 more source