Photo-origami—Bending and folding polymers with light
Jennie Ryu, Matteo D’Amato, Xiaodong Cui, Kevin N. Long, H. Jerry Qi, and Martin L. Dunn
An idea based on the traditional Japanese art of paper-folding, optical origami uses light to enable controllable, sequenced, macroscopic bending and folding of organic polymers. The technique uses embedded mechanical and optical fields as actuators that can be used to manipulate the polymer sheets.
Appl. Phys. Lett. 100, 161908 (2012)
Read the press release: [Optical Origami, Ian S. Osborne] www.sciencemag.org
Physics of ultra-high bioproductivity in algal photobioreactors
Efrat Greenwald, Jeffrey M. Gordon, and Yair Zarmi
Traditional microalgae production generally performs well below the fundamental bioproductivity limits. This paper describes a model for photobioreactors that can produce order-of-magnitude increases in bioproductivity, with applications in pharmaceuticals, wastewater treatment, and biofuels.
Fast programming metal-gate Si quantum dot nonvolatile memory using green nanosecond laser spike annealing
Yu-Chung Lien, Jia-Min Shieh, Wen-Hsien Huang, Cheng-Hui Tu, Chieh Wang, Chang-Hong Shen, Bau-Tong Dai, Ci-Ling Pan, Chenming Hu, and Fu-Liang Yang
Researchers present an ultrafast nonvolatile memory solution. The memory, based on silicon quantum dot-embedded dielectrics, resists degradation whilst maintaining fast programming with low operating voltages, and can be integrated into current production processes.
X-ray pulse preserving single-shot optical cross-correlation method for improved experimental temporal resolution
M. Beye, O. Krupin, G. Hays, A. H. Reid, D. Rupp, S. de Jong, S. Lee, W.-S. Lee, Y.-D. Chuang, R. Coffee, J. P. Cryan, J. M. Glownia, A. Föhlisch, M. R. Holmes, A. R. Fry, W. E. White, C. Bostedt, A. O. Scherz, H. A. Durr, and W. F. Schlotter
The authors measured the relative arrival time between an optical pulse and a soft x-ray pulse from a free-electron laser. These time resolution of pump-probe experiments at LCLS were improved at least by a factor of two to 130 fs (FWHM). The results achieved with this method present a clear path toward temporal resolutions below 100 fs.
Electric field effects in low resistance CoFeB-MgO magnetic tunnel junctions with perpendicular anisotropy
H. Meng, R. Sbiaa, M. A. K. Akhtar, R. S. Liu, V. B. Naik, and C. C. Wang
Investigations the electric field effects in low resistance perpendicular magnetic tunnel junction (MTJ) devices found that the electric field can effectively reduce the coercivity (Hc) of free layer (FL) by 30% for a bias voltage (Vb) of −0.2V. This is in in contrast to a much less sensitive of Hc to Vb for the reference layer (RL). The authors argue these findings are be important for memory technologies.
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We are saddened to report the sudden passing of APL Senior Associate Editor, Jules L. Routbort. Dr. Routbort joined the Journal as an Associate Editor in 1992, and became Senior Associate Editor in 2008, in concurrence with his regular research work as a Senior Scientist at Argonne National Laboratory. In his 20-year dedicated service to the Journal, he efficiently shepherded thousands of submitted papers through the peer-review system and constantly strived to maintain high standards of APL publications. His judgment was always fair and firm. The American Institute of Physics joins the entire APL community in honoring Dr. Routbort’s legacy of excellence.
Celebrating APL’s 50th Anniversary!
The first year of Applied Physics Letters ran approximately 8 articles every two weeks. Since the first issue, published in September 1962, the Journal has evolved to meet the changing needs of the scientific community and to follow the trends of the applied physics field. In 2011, a week’s worth of Applied Physics Letters amounts to about 85 articles per issue across a broad range of topics, all highly relevant and highly cited.
Now, as APL enters its fiftieth year of serving the needs of physicists and scientists around the globe, we invite you to not only look back at the most highly cited papers from the past 50 years, but also to look forward to another 50 exciting years on the cutting edge of scientific discovery!
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