English
Related papers

Related papers: Tunneling-assisted impact ionization fronts in sem…

200 papers

We present first results from a novel experimental platform which is able to access physics relevant to topics including indirect-drive magnetised ICF; laser energy deposition; various topics in atomic physics; and laboratory astrophysics…

Resonantly-forced oscillatory reaction-diffusion systems can exhibit fronts with complicated interfacial structure separating phase-locked homogeneous states. For values of the forcing amplitude below a critical value the front "explodes"…

Pattern Formation and Solitons · Physics 2009-11-11 Jörn Davidsen , Alexander Mikhailov , Raymond Kapral

We demonstrate that non-equilibrium electrons in thin nonmagnetic semiconductor layers or quantum dots can be fully spin polarized by means of simultaneous electrical spin injection and extraction. The complete spin polarization is achieved…

Other Condensed Matter · Physics 2009-11-11 V. V. Osipov , A. G. Petukhov , V. N. Smelyanskiy

The current work proposes a method for pulsed-light polarization of nitrogen-vacancy (NV) center electron spin. To evaluate the influence of pulsed spin polarization, we establish a polarization evaluation index based on polarizability and…

Applied Physics · Physics 2020-10-05 Zhang Jixing , Liu Tianzheng , Xu Lixia , Bian Guodong , Fan Pengcheng , Li Mingxin , Zhang Ning , Yuan Heng

In this study, we report the first Cu-filled through silicon via (TSV) integrated ion trap. TSVs are placed directly underneath electrodes as vertical interconnections between ion trap and a glass interposer, facilitating the arbitrary…

Atomic Physics · Physics 2021-04-07 P. Zhao , J. -P. Likforman , H. Y. Li , J. Tao , T. Henner , Y. D. Lim , W. W. Seit , C. S. Tan , Luca Guidoni

We show that when a solid plasma foil with a density gradient on the front surface is irradiated by an intense laser pulse at a grazing angle, around 80 degrees, a relativistic electron vortex is excited in the near-critical-density layer…

Plasma Physics · Physics 2019-07-18 Longqing Yi , István Pusztai , Alexander Pukhov , Baifei Shen , Tünde Fülöp

Particle acceleration using ultraintense, ultrashort laser pulses is one of the most attractive topics in relativistic laser-plasma research. We report proton/ion acceleration in the intensity range of 5x1019 W/cm2 to 3.3x1020 W/cm2 by…

We perform entanglement of spin and motional degrees of freedom of a single, ground-state trapped ion through the application of a $16$ ps laser pulse. The duration of the interaction is significantly shorter than both the motional…

Quantum Physics · Physics 2024-02-23 Randall Putnam , Adam D. West , Wesley C. Campbell , Paul Hamilton

We suggest a consistent microscopic theory of spin injection from a ferromagnet (FM) into a semiconductor (S). It describes tunneling and emission of electrons through modified FM-S Schottky barrier with an ultrathin heavily doped…

Materials Science · Physics 2009-11-10 V. V. Osipov , A. M. Bratkovsky

Laser-driven collisonless electrostatic shock formation and the subsequent ion acceleration have been studied in near critical density plasmas. Particle-in-cell simulations show that both the speed of laser-driven collisionless…

Plasma Physics · Physics 2016-11-22 M. Liu , S. M. Weng , Y. T. Li , D. W. Yuan , M. Chen , P. Mulser , Z. M. Sheng , M. Murakami , L. L. Yu , X. L. Zheng , J. Zhang

Theoretical study of heavy ion acceleration from ultrathin (<200 nm) gold foils irradiated by a short pulse laser is presented. Using two dimensional particle-in-cell simulations the time history of the laser bullet is examined in order to…

Plasma Physics · Physics 2015-11-25 G. M. Petrov , C. McGuffey , A. G. R. Thomas , K. Krushelnick , F. N. Beg

It is argued and demonstrated by particle-in-cell simulations that the synchrotron maser instability could develop at the front of a relativistic, magnetized shock. The instability generates strong low-frequency electromagnetic waves…

Astrophysics · Physics 2008-11-26 Yuri Lyubarsky

We propose a new approach to high-intensity laser-driven electron acceleration in a plasma. Here, we demonstrate that a plasma wave generated by a stimulated forward-scattering of an incident laser pulse can be in a longest acceleration…

Plasma Physics · Physics 2014-05-09 A. A. Rukhadze , S. P. Sadykova , T. G. Samkharadze , P. Gibbon

We present a Vlasov, i.e. a kinetic Eulerian simulation study of nonlinear collisionless ion-acoustic shocks and solitons excited by an intense laser interacting with an overdense plasma. The use of the Vlasov code avoids problems with low…

Plasma Physics · Physics 2016-03-23 Anna Grassi , Luca Fedeli , Andrea Sgattoni , Andrea Macchi

The formation of collisionless shock fronts is an ubiquitous phenomenon in space plasma environments. In the solar wind shocks might accompany coronal mass ejections, while even more violent events, such as supernovae, produce shock fronts…

High Energy Astrophysical Phenomena · Physics 2020-03-17 Cedric Schreiner , Patrick Kilian , Felix Spanier , Patricio A. Muñoz , Jörg Büchner

We describe a versatile pulsed-power driven platform for magnetic reconnection experiments, based on exploding wire arrays driven in parallel [Suttle, L. G. et al. PRL, 116, 225001]. This platform produces inherently magnetised plasma flows…

Tunneling and over-barrier ionization are the primary processes of strong-field ionization of atoms and molecules. While the dynamics of tunneling ionization have been extensively studied, exploration of over-barrier ionization dynamics has…

Atomic Physics · Physics 2025-09-03 Yongzhe Ma , Qingcao Liu , Hongcheng Ni , Jian Wu

The injection of spin polarized electrons from ferromagnetic metals (Fe and Co) into gallium nitride (GaN) via scanning tunneling microscopy (STM) is demonstrated. Electrons from STM tips are injected into the semiconductor. Net circular…

Mesoscale and Nanoscale Physics · Physics 2009-09-25 C. J. Hill , X. Cartoixa , R. A. Beach , D. L. Smith , T. C. McGill

We report a novel experimental technique for the comparison of ionization processes in ultrafast laser pulses irrespective of pulse ellipticity. Multiple ionization of xenon by 50 fs 790 nm, linearly and circularly polarized laser pulses is…

We theoretically examine generation of spin-polarized current using multi-terminated quantum dot with spin-orbit interaction. First, a two-level quantum dot is analyzed as a minimal model, which is connected to $N$ ($\ge 2$) external leads…

Mesoscale and Nanoscale Physics · Physics 2012-11-12 Tomohiro Yokoyama , Mikio Eto
‹ Prev 1 8 9 10 Next ›