We study the zitterbewegung of electronic wave packets in III-V zinc-blende semiconductor quantum wells due to spin-orbit coupling. Our results suggest a direct experimental proof of this fundamental effect, confirming a long-standing theoretical prediction. For electron motion in a harmonic quantum wire, we numerically and analytically find a resonance condition maximizing the zitterbewegung.

Spectroscopic magnetization-induced optical second harmonic generation (MSHG) measurements from a clean Ni(110) surface reveal strong resonance effects near 2.7 eV that can be attributed to the presence of an empty surface state. The good agreement with model calculations shows the potential of MSHG to probe spin-polarized interface band structures.

From the measurement of a reflection spectrum of an open microwave cavity, the poles of the scattering matrix in the complex plane have been determined. The resonances have been extracted by means of the harmonic inversion method. By this, it became possible to resolve the resonances in a regime where the linewidths exceed the mean level spacing up to a factor of 10, a value inaccessible in exp...

GENRAY and CQL3D were used to estimate the Electron Bernstein Wave (EBW) current drive profiles normalised efficiency ? CD (6) for several STEP reactor concepts with varying temperature, density, geometry magnetic field. > 1.0 was readily found ? = 0.65 ? 0.9 while 0.5 ? 0.5. Okhawa is be most efficient mechanism due high trapped fraction in STEP. Optimal 2 nd harmonic absorption ? 0.8 highe...

This paper proposes a method to improve the output torque of six-phase permanent-magnet synchronous machine (PMSM) within same current peak limit through fifth-harmonic injection into each phase stator. Compared fifth + seventh-harmonic current-injection used PMSM, control system can be stably controlled, and controller design complexity decreased. is because harmonic component was converted di...

We study resonant two-photon ionization of helium atoms via the 1 s 3 p , 4 and 5 P states using 15 th harmonic a titanium-sapphire laser for excitation weak fraction field ionization. The phase photoelectron wavepackets is measured by an attosecond interferometric technique, 17 harmonic. perform experiments with angular resolution velocity map imaging spectrometer high energy magnetic bottle e...

The strong-field many-electron dynamics is studied via the resonance-enhanced high-order harmonic generation (HHG) of niobium. In intense IR lights excited states Nb with configuration $4{d}^{3}5s\phantom{\rule{0.16em}{0ex}}np$ play a vital role in enhanced HHG below ionization potential, even though electron initially occupying $5s$ orbital most active. energies these increase linearly laser i...

Second Harmonic Generation (SHG) is a widely used tool to study surfaces. Here we investigate SHG from spherical nanoparticles consisting of a dielectric core (radius 100 nm) and a metallic shell of variable thickness. Plasmonic resonances occur that depend on the thickness of the nanoshells and boost the intensity of the Second Harmonic (SH) signal. The origin of the resonances is studied for ...

Motivated by experimental observations of exotic free surface standing wave patterns in the two-frequency Faraday experiment, we investigate the role of normal form symmetries in the associated pattern-selection problem. With forcing frequency components in ratio m/n, where m and n are coprime integers that are not both odd, there is the possibility that both harmonic waves and subharmonic wave...