Coherent phonon control

Synnergren, Ola; Hansen, T.N.; Canton, Sophie E.; Enquist, Henrik; Sondhauss, Peter; Srivastava, Alok; Larsson, Jörgen

doi:10.1063/1.2734369

Cited by 9 publications

(9 citation statements)

References 32 publications

(27 reference statements)

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“…One possibility could be to mechanically pump the NV (and/or P1) spin, for instance, by stimulating spin-polarized acoustic phonons matched to the spin resonance frequency. To this end, one could resort to existing photo-acoustic methods based on timed femtosecond laser pulses 46,47 , in this case tailored so as to coherently inject chiral phonons into the diamond lattice. Science Advancement through a FRED Award; they also acknowledge access to the facilities and research infrastructure of the NSF CREST IDEALS, grant number NSF-HRD-1547830.…”

Section: Discussion and Outlookmentioning

confidence: 99%

Mechanical rotation via optical pumping of paramagnetic impurities

Zangara¹,

Wood²,

Doherty³

et al. 2019

Phys. Rev. B

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Hybrid quantum systems exhibiting coupled optical, spin, and mechanical degrees of freedom can serve as a platform for sensing, or as a bus to mediate interactions between qubits with disparate energy scales. These systems are also creating opportunities to test foundational ideas in quantum mechanics, including direct observations of the quantum regime in macroscopic objects. Here, we make use of angular momentum conservation to study the dynamics of a pair of paramagnetic centers featuring different spin numbers in the presence of a properly tuned external magnetic field. We examine the interplay between optical excitation, spin evolution, and mechanical motion, and theoretically show that in the presence of continuous optical illumination, inter-spin crossrelaxation must induce rigid rotation of the host crystal. The system dynamics is robust to scattering of spin-polarized phonons, a result we build on to show this form of angular momentum transfer should be observable using state-of-the-art torsional oscillators or trapped nanoparticles.

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Section: Discussion and Outlookmentioning

confidence: 99%

Mechanical rotation via optical pumping of paramagnetic impurities

Zangara¹,

Wood²,

Doherty³

et al. 2019

Phys. Rev. B

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“…The oscillation amplitude of such an impulsively excited harmonic oscillator can either be suppressed or doubled by a second identical excitation with a relative time delay τ of a half-period (relative phase φ = π) or a full period (φ = 2π), respectively. This type of coherent control has been successfully applied to2 various phenomena such as phonons [17][18][19][20], magnons [21][22][23], phonon-polaritons [24], and surface acoustic waves (SAWs) [14,[25][26][27]. In displacive excitations, coherent control is limited to the oscillatory motion, i.e., the coherent part of the system response.…”

Section: Coherent Control Of Periodic Surface Deformationsmentioning

confidence: 99%

Full Spatiotemporal Control of Laser-Excited Periodic Surface Deformations

et al. 2019

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We demonstrate full control of acoustic and thermal periodic deformations at solid surfaces down to sub-nanosecond time scales and few-micrometer length scales via independent variation of the temporal and spatial phase of two optical transient grating (TG) excitations. For this purpose, we introduce an experimental setup that exerts control of the spatial phase of subsequent time-delayed TG excitations depending on their polarization state. Specific exemplary coherent control cases are discussed theoretically and corresponding experimental data are presented in which time-resolved x-ray reflectivity measures the spatiotemporal surface distortion of nanolayered heterostructures. Finally, we discuss examples where the application of our method may enable the control of functional material properties via tailored spatiotemporal strain fields.

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“…The large initial strain, consisting of propagating 12 and stationary strain, builds up in 50 ps. The effect of the propagating strain wave decays due to dephasing 24 and after 200 ps only the stationary strain influences the X-ray intensity. Fig.…”

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confidence: 99%

Measurements of light absorption efficiency in InSb nanowires

Jurgilaitis

Enquist

Harb

et al. 2013

Structural Dynamics

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We report on measurements of the light absorption efficiency of InSb nanowires. The absorbed 70 fs light pulse generates carriers, which equilibrate with the lattice via electron-phonon coupling. The increase in lattice temperature is manifested as a strain that can be measured with X-ray diffraction. The diffracted X-ray signal from the excited sample was measured using a streak camera. The amount of absorbed light was deduced by comparing X-ray diffraction measurements with simulations. It was found that 3.0(6)% of the radiation incident on the sample was absorbed by the nanowires, which cover 2.5% of the sample.

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Coherent phonon control

Cited by 9 publications

References 32 publications

Mechanical rotation via optical pumping of paramagnetic impurities

Mechanical rotation via optical pumping of paramagnetic impurities

Full Spatiotemporal Control of Laser-Excited Periodic Surface Deformations

Measurements of light absorption efficiency in InSb nanowires

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