Optical Excitation of Converging Surface Acoustic Waves in the Gigahertz Range on Silicon.

Andrey Y Klokov,Andrey I Sharkov,Vladimir S Krivobok,Nikolay Y Frolov

doi:10.3390/s22030870

Andrey Y Klokov, Andrey I Sharkov + Show 2 more

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https://doi.org/10.3390/s22030870

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Abstract

The optical excitation and propagation of converging surface acoustic waves on silicon with orientations (001) and (111) have been experimentally studied. An axicon-assisted formation of an annular irradiated region on the sample surface served as a source for converging surface waves. Surface wave patterns at different times were recorded using a Sagnac interferometer with spatial resolution. A study of the field distribution at the focus showed that, in spite of elastic anisotropy, which generally leads to aberrations, the acoustic energy can be concentrated into a spot with dimensions close to the diffraction limit. An asymmetric excitation distribution makes it possible to control the structure of the converged wave field at the focus, providing an effective tool for all-optical diagnostics of the local crystal structure as well as electronic properties of quantum objects embedded in the solid-state matrix.

Highlights

The property management of quantum systems by means of coherent phonons—deformation pulses—has been actively studied
Surface acoustic waves (SAW) that penetrate to a depth of the order of the wavelength allow to study the interaction with quantum objects located on the sample surface or within close proximity to it
We studied the excitation and propagation of converging SAWs on the silicon surface with the (001) and (111) orientations

Summary

Introduction

The property management of quantum systems by means of coherent phonons—deformation pulses—has been actively studied. A number of studies have demonstrated the possibility of managing the luminescence properties and the spin subsystem of color centers in diamond, as well as the microcavity radiation [1,2,3,4]. In most of these experiments, the dynamic deformation value is at the level of 10−4–10−5. It is of interest to study the electron–phonon interaction within the limit of large local deformations, when perturbation theory is inapplicable. Surface acoustic waves (SAW) that penetrate to a depth of the order of the wavelength allow to study the interaction with quantum objects located on the sample surface or within close proximity to it

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