Experimental Studies on Nonlinear Dispersive Surface Acoustic Waves for Solitons

Kavalerov, V.; Katoh, Hideki; Kasaya, N.; Inoue, M.; Fujii, T.

doi:10.1143/jjap.34.2653

Cited by 16 publications

(3 citation statements)

References 9 publications

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“…The waveform detected on IDT2, however, exhibits a strongly distorted shape. Although changes in the SAW waveform can be induced by the presence of unwanted harmonic frequencies sent to IDT1 by the rf-amplifier (its frequency domain equivalent recorded by a spectrum analyzer confirmed the presence of harmonic signal components of differing relative amplitudes (not shown)), we attribute the observed distortions mainly to the generation of harmonics of the driving acoustic frequency due to nonlinear acoustic interactions in the LiNbO3 substrate at high rf power excitations [25,26]. The resulting harmonic-frequency waves can then effectively interact to reconstruct the fundamental mode, but the extent to which this occurs depends on the strength of nonlinear dispersion effects, which scales with the SAW amplitude.…”

Section: Rf Power-dependent Waveform Distortionsmentioning

confidence: 73%

Acoustically regulated optical emission dynamics from quantum dot-like emission centers in GaN/InGaN nanowire heterostructures

Lazić

Chernysheva

Hernández-Mínguez

et al. 2018

J. Phys. D: Appl. Phys.

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We report on experimental studies of the effects induced by surface acoustic waves on the optical emission dynamics of GaN/InGaN nanowire quantum dots. We employ stroboscopic optical excitation with either time-integrated or time-resolved photoluminescence detection. In the absence of the acoustic wave, the emission spectra reveal signatures originated from the recombination of neutral exciton and biexciton confined in the probed nanowire quantum dot. When the nanowire is perturbed by the propagating acoustic wave, the embedded quantum dot is periodically strained and its excitonic transitions are modulated by the acousto-mechanical coupling. Depending on the recombination lifetime of the involved optical transitions, we can resolve acoustically driven radiative processes over time scales defined by the acoustic cycle. At high acoustic amplitudes, we also observe distortions in the transmitted acoustic waveform, which are reflected in the time-dependent spectral response of our sensor quantum dot. In addition, the correlated intensity oscillations observed during temporal decay of the exciton and biexciton emission suggest an effect of the acoustic piezoelectric fields on the quantum dot charge population. The present results are relevant for the dynamic spectral and temporal control of photon emission in III-nitride semiconductor heterostructures.

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Section: Rf Power-dependent Waveform Distortionsmentioning

confidence: 73%

Acoustically regulated optical emission dynamics from quantum dot-like emission centers in GaN/InGaN nanowire heterostructures

Lazić

Chernysheva

Hernández-Mínguez

et al. 2018

J. Phys. D: Appl. Phys.

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“…For the optical probing of harmonic generation usually the variation of the first and higher order diffracted probe laser intensities have been monitored as a function of acoustic power. [10][11][12][13] In the present experiments we launched coherent SAWs with picosecond laser pulses and demonstrated that in the nonlinear excitation regime SRWs with higher harmonics can easily be excited. For optical recording outside the source we used a probe beam deflection technique for detection in the time domain.…”

mentioning

confidence: 68%

Excitation of higher harmonics in transient laser gratings by an ablative mechanism

Shen

Lomonosov

Frass

et al. 1998

Applied Physics Letters

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Laser-induced transient gratings were excited at the surface of an aluminum film by picosecond laser pulses. The counterpropagating surface acoustic waves with a fundamental frequency of 70 MHz that were launched were monitored outside the source region by laser probe beam deflection. The second and third harmonics were observed for ablative interaction of the laser radiation with the aluminum surface. A simple model is presented that describes the effects on the basis of nonlinear photoacoustic signal generation at the source due to a nonsinusoidal driving force.

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“…In this respect, Eq. (2.16) differs from the KdV equation and the Benjamin-Ono equation which have both been suggested as governing equations for nonlinear SAWs[35][36][37][38].…”

mentioning

confidence: 99%

Solitary surface acoustic waves

et al. 2004

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Solitary acoustic pulses can propagate along the surface of a coated homogeneous and inhomogeneous medium. It is shown how these nonlinear surface acoustic waves evolve out of initial pulselike conditions generated by pulsed laser excitation and how they can be monitored by optical detection. The solitary pulse shapes at the surface are computed on the basis of an evolution equation with nonlocal nonlinearity. They depend on the anisotropy of the substrate. Various approaches for the derivation of the evolution equation from nonlinear elasticity theory are critically compared. The behavior of the solitary pulses in collisions is investigated and is found to strongly depend on the linear dispersion law. The nontrivial depth dependence of these solitary pulses is also analyzed.

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Experimental Studies on Nonlinear Dispersive Surface Acoustic Waves for Solitons

Cited by 16 publications

References 9 publications

Acoustically regulated optical emission dynamics from quantum dot-like emission centers in GaN/InGaN nanowire heterostructures

Acoustically regulated optical emission dynamics from quantum dot-like emission centers in GaN/InGaN nanowire heterostructures

Excitation of higher harmonics in transient laser gratings by an ablative mechanism

Solitary surface acoustic waves

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