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

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue Next Issue

10 Mar 2008

Volume 92, Issue 10, Articles (10xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 92, 102101 (2008); http://dx.doi.org/10.1063/1.2890735 (3 pages)

Qing Wan, Jin Huang, Zhong Xie, Taihong Wang, Eric N. Dattoli, and Wei Lu
Enlarge Image | Read More
Page 2 of 2 Pages Return to All Sections Previous Page
back to top
RSS Feeds

Segregation-controlled nanocrystallization in an Al–Ni–La metallic glass

B. Radiguet, D. Blavette, N. Wanderka, J. Banhart, and K. L. Sahoo

Appl. Phys. Lett. 92, 103126 (2008); http://dx.doi.org/10.1063/1.2897303 (3 pages) | Cited 10 times

Online Publication Date: 14 March 2008

Full Text: Read Online (HTML) | Download PDF

Show Abstract
The early stages of devitrification of Al89Ni6La5 metallic glass were investigated using three-dimensional atom probe. Even in the as-quenched amorphous state, nanometer-sized fluctuations of Ni and Al were observed. The Al-rich fluctuations act as nucleation sites for the crystallization at 443 K in which α-Al clusters with a number density up to 5×1023 m−3 nucleate and grow to nonspherical, 12 nm large crystals. α-Al particles are almost pure in Al and are surrounded by a La-rich shell. It is concluded that La segregation controls the growth and limits the size of the α-Al nanocrystals.
Show PACS
64.70.dg Crystallization of specific substances
61.43.Fs Glasses
64.70.pe Metallic glasses
68.65.-k Low-dimensional, mesoscopic, nanoscale and other related systems: structure and nonelectronic properties
81.16.-c Methods of micro- and nanofabrication and processing
61.46.Df Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots)

Spin diode based on a single-walled carbon nanotube

I. Weymann and J. Barnaś

Appl. Phys. Lett. 92, 103127 (2008); http://dx.doi.org/10.1063/1.2894224 (3 pages) | Cited 14 times

Online Publication Date: 14 March 2008

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Electronic transport through a single-walled, metallic carbon nanotube weakly coupled to one ferromagnetic and one nonmagnetic lead is analyzed in the sequential tunneling limit. It is shown that both the spin and charge currents flowing through such systems are highly asymmetric with respect to the bias reversal. As a consequence, nanotubes coupled to one nonmagnetic and one ferromagnetic lead can be effectively used as spin diodes whose functionality can be additionally controlled by a gate voltage.
Show PACS
72.25.-b Spin polarized transport
73.40.Gk Tunneling

Efficient light coupling from integrated single-mode waveguides to supercollimating photonic crystals on silicon-on-insulator platforms

K. Vynck, E. Centeno, M. Le Vassor d’Yerville, and D. Cassagne

Appl. Phys. Lett. 92, 103128 (2008); http://dx.doi.org/10.1063/1.2898221 (3 pages) | Cited 3 times

Online Publication Date: 14 March 2008

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We propose a practical and efficient solution for the coupling of light from integrated single-mode waveguides to supercollimating planar photonic crystals (PhCs) on conventional silicon-on-insulator platforms. The device consists of a rib waveguide, designed to sustain spatially extended single modes and matched to a supercollimating PhC, which has been truncated at its boundary to improve impedance matching between the two photonic components. Three-dimensional simulations show transmission efficiencies up to 96% and reflections below 0.2% at wavelengths close to 1.55 μm. This approach constitutes a significant step toward the integration of supercollimating structures on photonic chips.
Show PACS
42.82.Et Waveguides, couplers, and arrays
42.82.Bq Design and performance testing of integrated-optical systems
42.79.Gn Optical waveguides and couplers
42.70.Qs Photonic bandgap materials
Page 2 of 2 Pages Return to All Sections Previous Page
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close