منابع مشابه
Control of coherent acoustic phonons in semiconductor quantum wells.
Using subpicosecond optical pump-probe techniques, coherent zone-folded longitudinal acoustic phonons (ZFLAPs) were investigated in an InGaN multiple quantum well structure. A two-pump differential transmission technique was used to generate and control coherent ZFLAP oscillations through the relative timing and amplitude of the two pump pulses. Enhancement and suppression of ZFLAP oscillations...
متن کاملCoherent control of acoustic phonons in semiconductor superlattices
Coherent acoustic phonons are generated in GaAs/AlAs superlattices by excitation with femtosecond laser pulses. Several modes of the acoustic phonon spectrum are observed, in agreement with the effect of zone folding in the mini-Brillouin zone of the superlattice. By applying successive pump pulses we are able to silence the first back-folded mode near q50, while selectively enhancing the coher...
متن کاملCoherent generation of acoustic phonons in an optical microcavity.
Ultrafast coherent generation of acoustic phonons is studied in a semiconductor optical microcavity. The confinement of the light pulse amplifies both the generation and the detection of phonons. In addition, the standing wave character of the photon field modifies the generation and detection phonon bandwidth. Coherent generation experiments in an acoustic nanocavity embedded in an optical mic...
متن کاملGeneration mechanism of terahertz coherent acoustic phonons in Fe
T. Henighan,1,2,* M. Trigo,1,3 S. Bonetti,3 P. Granitzka,3,4 D. Higley,3,5,6 Z. Chen,2,3 M. P. Jiang,1,2 R. Kukreja,3 A. Gray,3 A. H. Reid,3 E. Jal,3 M. C. Hoffmann,6 M. Kozina,1,6 S. Song,6 M. Chollet,6 D. Zhu,6 P. F. Xu,7,8 J. Jeong,7 K. Carva,9,10 P. Maldonado,10 P. M. Oppeneer,10 M. G. Samant,7 S. S. P. Parkin,7,8 D. A. Reis,1,3,5 and H. A. Dürr3,† 1Stanford PULSE Institute, SLAC National A...
متن کاملCoherent acoustic phonons in nanostructures investigated by asynchronous optical sampling
A new optical pump-probe technique is implemented for the investigation of acoustic phonon dynamics in the GHz to THz frequency range which is based on two asynchronously linked femtosecond lasers. Asynchronous optical sampling (ASOPS) provides the performance of on all-optical oscilloscope and allows us to record optically induced lattice dynamics over nanosecond times with 200 femtoseconds re...
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ژورنال
عنوان ژورنال: Optics and Photonics News
سال: 2001
ISSN: 1047-6938,1541-3721
DOI: 10.1364/opn.12.12.000066