Featured
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One-by-one trap activation in silicon nanowire transistors
Flicker noise in nanoscale field effect transistors deviates from the simple frequency-dependent behaviour of macroscale objects. Here the authors show that Coulomb repulsion between nearby trap sites leads to an order of magnitude reduction in noise in these devices.
- N. Clément
- , K. Nishiguchi
- & D. Vuillaume
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Image transmission through an opaque material
The challenge of reconstructing the image of an object when viewed through an opaque material is of particular importance for biological tissues. Here, the authors show that it is possible to reconstruct the image of a complex object from interference patterns of multiple wavefronts using phase-shifting interferometry.
- Sébastien Popoff
- , Geoffroy Lerosey
- & Sylvain Gigan
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| Open Access
Phase seeding of a terahertz quantum cascade laser
The phase of a laser pulse is usually random, which prevents its use for phase-resolved measurements. Here, the authors seed a quantum cascade laser with coherent terahertz pulses, forcing laser action to start on a fixed phase. This kind of laser could be used as a source in time-domain spectroscopy.
- Dimitri Oustinov
- , Nathan Jukam
- & Sukhdeep Dhillon
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Plasmonic nanoresonators for high-resolution colour filtering and spectral imaging
With the miniaturization of integrated optical devices, traditional colour filters are increasingly bulky. To supersede these, the authors devise a plasmonic metal–insulator–metal nanostructured array that can filter colours with high spatial and band resolution.
- Ting Xu
- , Yi-Kuei Wu
- & L. Jay Guo
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Article
| Open Access
Tunable quantum beam splitters for coherent manipulation of a solid-state tripartite qubit system
Coherent control of solid-state multi-qubit systems is highly desirable for quantum information. Here the authors show coupling, and control through Landau–Zener interference, of a superconducting qubit and two microscopic two-level systems, creating an interesting platform for quantum computation.
- Guozhu Sun
- , Xueda Wen
- & Siyuan Han
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Nanoelectromechanical coupling in fullerene peapods probed by resonant electrical transport experiments
Fullerene peapods are carbon nanotubes encapsulating buckyball molecules. Here the authors show by low-temperature electron transport experiments, that the electronic states of nanotubes couple to the vibrational states of fullerenes, making the peapods a new class of nanoelectromechanical devices.
- Pawel Utko
- , Raffaello Ferone
- & Jesper Nygård
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| Open Access
On-chip CMOS-compatible all-optical integrator
One reason for using photonic devices is their speed—much faster than electronic circuits—but there are many challenges in integrating the two technologies. Ferreraet al. construct a CMOS-compatible monolithic optical waveform integrator, a key building block for photonic circuits.
- M. Ferrera
- , Y. Park
- & J. Azaña
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Article
| Open Access
Three-dimensional broadband ground-plane cloak made of metamaterials
Optical cloaking has already been demonstrated in two dimensions, and also in three dimensions for a limited range of angles. Now, Ma and Cui present a metamaterial-based cloaking device that can shield an object lying on the ground plane from all viewing angles at microwave frequencies.
- Hui Feng Ma
- & Tie Jun Cui
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Article
| Open Access
Large Rashba spin splitting of a metallic surface-state band on a semiconductor surface
Semiconductor spintronics applications require materials that can exhibit large spin-splitting while preserving a large number of carriers. Yaji and co-workers show this is possible at room temperature using a germanium surface covered with a lead monolayer.
- Koichiro Yaji
- , Yoshiyuki Ohtsubo
- & Tetsuya Aruga
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Article
| Open Access
Surface-wetting effects on the liquid–liquid transition of a single-component molecular liquid
A phase transition between two liquid states is a counterintuitive phenomenon, but one that is known to happen in certain materials. Murata and Tanaka now show in tryphenyl phosphite that this can also produce a change in the wetting of a surface, from partial to complete, at the transition temperature.
- Ken-ichiro Murata
- & Hajime Tanaka
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Large microwave generation from current-driven magnetic vortex oscillators in magnetic tunnel junctions
Microwave generation from nanoscale devices is important for future wireless technology, but the power generated in such devices can be small. Dussaux and coworkers have developed a powerful microwave emitter using magnetic vortices induced by spin transfer in a MgO-based magnetic tunnel junction.
- A. Dussaux
- , B. Georges
- & A. Fert
Protein-binding assays in biological liquids using microscale thermophoresis