Featured
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Reconstruction of Bloch wavefunctions of holes in a semiconductor
Bloch wavefunctions of two types of hole in gallium arsenide are reconstructed by measuring the polarization of light emitted by collisions of electrons and holes accelerated by a terahertz laser.
- J. B. Costello
- , S. D. O’Hara
- & M. S. Sherwin
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Tunable non-integer high-harmonic generation in a topological insulator
High-harmonic generation from the Dirac-like surface state of a topological insulator is separated from bulk contributions and continuously tuned by the carrier-envelope phase of the driving lightwave.
- C. P. Schmid
- , L. Weigl
- & R. Huber
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Laser picoscopy of valence electrons in solids
Laser-generated high-harmonic emission is used to image the valence potential and electron density in magnesium fluoride and calcium fluoride at the picometre scale, enabling direct probing of material properties.
- H. Lakhotia
- , H. Y. Kim
- & E. Goulielmakis
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Attosecond pulse shaping using a seeded free-electron laser
Generation of intense attosecond waveforms with independently controllable amplitude and phase is performed by using a seeded free-electron laser.
- Praveen Kumar Maroju
- , Cesare Grazioli
- & Giuseppe Sansone
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Letter |
Extreme-ultraviolet refractive optics
A refractive lens and a refractive prism for extreme-ultraviolet radiation have been developed that use the deflection of the radiation in an inhomogeneous jet of atoms.
- L. Drescher
- , O. Kornilov
- & B. Schütte
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Letter |
Lightwave valleytronics in a monolayer of tungsten diselenide
A strong lightwave in a monolayer of tungsten diselenide drives changes in the valley pseudospin, making valley pseudospin an information carrier that is switchable faster than a single light cycle.
- F. Langer
- , C. P. Schmid
- & R. Huber
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Letter |
Probing the interatomic potential of solids with strong-field nonlinear phononics
Ultrashort mid-infrared laser pulses can drive atoms far from their equilibrium positions in LiNbO3, exciting high phonon harmonics and providing a way to map the interatomic potential.
- A. von Hoegen
- , R. Mankowsky
- & A. Cavalleri
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Letter |
Solid-state harmonics beyond the atomic limit
A direct comparison of high harmonic generation in the solid and gas phases of Ar and Kr reveals higher harmonics in these rare-gas solids caused by strong interband couplings; evidence of recollisions implies that gas-phase techniques for attosecond pulse generation and orbital tomography could be adapted for solids.
- Georges Ndabashimiye
- , Shambhu Ghimire
- & David A. Reis
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Letter |
Real-time observation of interfering crystal electrons in high-harmonic generation
The generation of high harmonics in the solid phase is studied with time-resolved measurements and a quantum many-body theory; the underlying motion of electrons is found to differ from that observed during high-harmonic generation in atomic gases, and involves quantum interference between electrons from multiple valence bands.
- M. Hohenleutner
- , F. Langer
- & R. Huber
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Letter |
Linking high harmonics from gases and solids
High-harmonic generation in zinc oxide illuminated by an intense, pulsed, mid-infrared laser is found to involve a recollision effect in which electrons recollide with holes causing harmonics to be emitted, a process similar to that which occurs in atomic systems.
- G. Vampa
- , T. J. Hammond
- & P. B. Corkum
Attosecond clocking of correlations between Bloch electrons