APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Next Issue

2 Jan 2012

Volume 100, Issue 1, Articles (01xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 100, 013101 (2012); http://dx.doi.org/10.1063/1.3673334 (3 pages)

Patrice Genevet, Nanfang Yu, Francesco Aieta, Jiao Lin, Mikhail A. Kats, Romain Blanchard, Marlan O. Scully, Zeno Gaburro, and Federico Capasso
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Enhancement of impact-induced mechanoluminescence by swift heavy ion irradiation

T. Z. Zhan, C. N. Xu, H. Yamada, Y. Terasawa, L. Zhang, H. Iwase, and M. Kawai

Appl. Phys. Lett. 100, 014101 (2012); http://dx.doi.org/10.1063/1.3673342 (3 pages) | Cited 1 time

Online Publication Date: 3 January 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
In this Letter, we report a strategy using swift heavy ion (SHI) irradiation to enhance the impact-induced mechanoluminescence (ML) in ML materials. The impact-induced ML intensity of CaSrAl2Si2O8:Eu2+ was enhanced by about one order of magnitude by using SHI irradiation. Furthermore, the enhancement was found to depend on electronic stopping power and irradiation fluence. The density of traps of a type suitable for impact-induced ML is considered to be increased by the SHI irradiation, resulting in the impact-induced ML enhancement.
Show PACS
78.60.Mq Sonoluminescence, triboluminescence
61.80.Jh Ion radiation effects
78.60.Hk Cathodoluminescence, ionoluminescence

Passivation of InP heterojunction bipolar transistors by strain controlled plasma assisted electron beam evaporated hafnium oxide

R. Driad, R. E. Sah, R. Schmidt, and L. Kirste

Appl. Phys. Lett. 100, 014102 (2012); http://dx.doi.org/10.1063/1.3673564 (4 pages)

Online Publication Date: 3 January 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We present structural, stress, and electrical properties of plasma assisted e-beam evaporated hafnium dioxide (HfO2) layers on n-type InP substrates. These layers have subsequently been used for surface passivation of InGaAs/InP heterostructure bipolar transistors either alone or in combination with plasma enhanced chemical vapor deposited SiO2 layers. The use of stacked HfO2/SiO2 results in better interface quality with InGaAs/InP heterostructures, as illustrated by smaller leakage current and improved breakdown voltage. These improvements can be attributed to the reduced defect density and charge trapping at the dielectric-semiconductor interface. The deposition at room temperature makes these films suitable for sensitive devices.
Show PACS
85.30.Pq Bipolar transistors
81.65.Rv Passivation

Feasibility study of broadband efficient “water window” source

Takeshi Higashiguchi, Takamitsu Otsuka, Noboru Yugami, Weihua Jiang, Akira Endo, Bowen Li, Padraig Dunne, and Gerry O’Sullivan

Appl. Phys. Lett. 100, 014103 (2012); http://dx.doi.org/10.1063/1.3673912 (4 pages) | Cited 5 times

Online Publication Date: 3 January 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We demonstrate a table-top broadband emission water window source based on laser-produced high-Z plasmas. Resonance emission from multiply charged ions merges to produce intense unresolved transition arrays (UTAs) in the 2–4 nm region, extending below the carbon K edge (4.37 nm). Arrays resulting from n = 4-n = 4 transitions are overlaid with n = 4-n = 5 emission and shift to shorter wavelength with increasing atomic number. An outline of a microscope design for single-shot live cell imaging is proposed based on a bismuth plasma UTA source, coupled to multilayer mirror optics.
Show PACS
52.38.-r Laser-plasma interactions
42.79.Bh Lenses, prisms and mirrors

Electron acceleration via high contrast laser interacting with submicron clusters

Lu Zhang, Li-Ming Chen, Wei-Ming Wang, Wen-Chao Yan, Da-Wei Yuan, Jing-Yi Mao, Zhao-Hua Wang, Cheng Liu, Zhong-Wei Shen, Anatoly Faenov, Tatiana Pikuz, Da-Zhang Li, Yu-Tong Li, Quan-Li Dong, Xin Lu, et al.

Appl. Phys. Lett. 100, 014104 (2012); http://dx.doi.org/10.1063/1.3673911 (3 pages) | Cited 2 times

Online Publication Date: 4 January 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We experimentally investigated electron acceleration from submicron size argon clusters-gas target irradiated by a 100 fs, 10 TW laser pulses having a high-contrast. Electron beams are observed in the longitudinal and transverse directions to the laser propagation. The measured energy of the longitudinal electron reaches 600 MeV and the charge of the electron beam in the transverse direction is more than 3 nC. A two-dimensional particle-in-cell simulation of the interaction has been performed and it shows an enhancement of electron charge by using the cluster-gas target.
Show PACS
52.38.Dx Laser light absorption in plasmas (collisional, parametric, etc.)
52.20.Fs Electron collisions
52.65.Rr Particle-in-cell method
52.70.Kz Optical (ultraviolet, visible, infrared) measurements
52.25.Fi Transport properties

Femtosecond laser field induced modifications of electron-transfer processes in Ne+-He collisions

Zhenzhong Lu, Deying Chen, Rongwei Fan, and Yuanqin Xia

Appl. Phys. Lett. 100, 014105 (2012); http://dx.doi.org/10.1063/1.3673914 (3 pages)

Online Publication Date: 4 January 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We demonstrate the presence of femtosecond laser induced charge transfer in Ne+-He collisions. Electron transfer in ion-atom collisions is considerably modified when the collision is embedded in a strong laser field with the laser intensity of ∼1015 W/cm2. The observed anisotropy of the He+ angular distribution confirms the prediction of early work that the capture probability varies significantly with the laser polarization angle.
Show PACS
34.70.+e Charge transfer
32.80.-t Photoionization and excitation
34.50.Rk Laser-modified scattering and reactions

Linearly tapered discharge capillary waveguides as a medium for a laser plasma wakefield accelerator

S. Abuazoum, S. M. Wiggins, B. Ersfeld, K. Hart, G. Vieux, X. Yang, G. H. Welsh, R. C. Issac, M. P. Reijnders, D. R. Jones, and D. A. Jaroszynski

Appl. Phys. Lett. 100, 014106 (2012); http://dx.doi.org/10.1063/1.3674309 (3 pages) | Cited 3 times

Online Publication Date: 4 January 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Gas-filled capillary discharge waveguides are commonly used as media for plasma wakefield accelerators. We show that effective waveguides can be manufactured using a femtosecond laser micromachining technique to produce a linearly tapered plasma density, which enables the energy of the accelerator to be enhanced significantly. A laser guiding efficiency in excess of 82% at sub-relativistic intensities has been demonstrated in a 40 mm long capillary with a diameter tapering from 320 μm to 270 μm, which gives rise to an on-axis, time-averaged plasma density that varies from 1.0 × 1018 cm−3 to 1.6 × 1018 cm−3.
Show PACS
52.38.Kd Laser-plasma acceleration of electrons and ions
52.25.Os Emission, absorption, and scattering of electromagnetic radiation
52.38.Dx Laser light absorption in plasmas (collisional, parametric, etc.)
52.40.Fd Plasma interactions with antennas; plasma-filled waveguides

Actuation and tracking of a single magnetic particle on a chip

Philipp Rinklin, Hans-Joachim Krause, and Bernhard Wolfrum

Appl. Phys. Lett. 100, 014107 (2012); http://dx.doi.org/10.1063/1.3673909 (3 pages) | Cited 1 time

Online Publication Date: 5 January 2012

Full Text: Read Online (HTML) | Download PDF

multimedia

Show Abstract
We present the defined actuation of a single magnetic particle on a crossbar array chip. Two orthogonal layers of parallel microwires are used to generate highly localized magnetic field gradients for particle trapping and movement. We introduce an analytical model to simulate the actuation of the particle, which is in precise agreement with the experimentally observed trajectory. The single-particle approach allows us to resolve subtle features of the induced magnetic field distribution. We demonstrate that the actuation strongly depends on the applied current sequence and introduce switching patterns for reliable control of an individual particle.
Show PACS
75.50.Tt Fine-particle systems; nanocrystalline materials

Photoemission microscopy study of the two metal-insulator transitions in Cr-doped V2O3

B. Mansart, A. Barinov, P. Dudin, L. Baldassarre, A. Perucchi, E. Papalazarou, P. Metcalf, S. Lupi, and M. Marsi

Appl. Phys. Lett. 100, 014108 (2012); http://dx.doi.org/10.1063/1.3675445 (4 pages) | Cited 2 times

Online Publication Date: 6 January 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We present a spectromicroscopy study of the two distinct metal-insulator transitions in (V1−xCrx)2O3, x = 0.011. The coexistence of metallic and insulating domains was observed with scanning photoelectron microscopy for both the paramagnetic insulator-paramagnetic metal and paramagnetic metal-antiferromagnetic insulator transitions, evidencing a clear correlation between their nucleation regions. Although these two transitions are very different in nature and underlying mechanism, in both cases the morphology of their phase separation is influenced by structural inhomogeneities. These results demonstrate the general relevance of strain caused by local lattice distortions in guiding the intrinsic tendency towards phase separation in Mott materials.
Show PACS
71.30.+h Metal-insulator transitions and other electronic transitions
79.60.Bm Clean metal, semiconductor, and insulator surfaces
75.20.-g Diamagnetism, paramagnetism, and superparamagnetism
75.50.Ee Antiferromagnetics
75.30.Kz Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close