Optical tracking of picosecond coherent phonon pulse focusing inside a sub-micron object

Dehoux, Thomas; Ishikawa, Ken-ichi; Otsuka, Paul H.; Tomoda, Motonobu; Matsuda, Osamu; Fujiwara, Masazumi; Takeuchi, Shigeki; Veres, István A.; Gusev, Vitalyi; Wright, Oliver B.

doi:10.1038/lsa.2016.82

Cited by 29 publications

(33 citation statements)

References 35 publications

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“…In comparison with probing diffracting acoustic beam by a collinearly propagating diffracting optical probe beam, achieved in Ref. [13], the proposed scheme provides information simultaneously on multiple frequencies of the picosecond acoustic field.…”

Section: Introductionmentioning

confidence: 99%

“…Picosecond acoustic interferometry (PAI) is a powerful opto-acousto-optic technique for nondestructive and noncontact testing of transparent materials at the nanoscale [1][2][3][4][5][6][7][8][9][10][11][12][13]. First, using an ultrashort pump laser pulse, a propagating picosecond coherent acoustic pulse (CAP) is launched into the material.…”

Section: Introductionmentioning

confidence: 99%

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Time-domain Brillouin scattering assisted by diffraction gratings

et al. 2018

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Absorption of ultrashort laser pulses in a metallic grating deposited on a transparent sample launches coherent compression/dilatation acoustic pulses in directions of different orders of acoustic diffraction. Their propagation is detected by delayed laser pulses, which are also diffracted by the metallic grating, through the measurement of the transient intensity change of the first-order diffracted light. The obtained data contain multiple frequency components, which are interpreted by considering all possible angles for the Brillouin scattering of light achieved through multiplexing of the propagation directions of light and coherent sound by the metallic grating. The emitted acoustic field can be equivalently presented as a superposition of plane inhomogeneous acoustic waves, which constitute an acoustic diffraction grating for the probe light. Thus the obtained results can also be interpreted as a consequence of probe light diffraction by both metallic and acoustic gratings. The realized scheme of time-domain Brillouin scattering with metallic gratings operating in reflection mode provides access to wide range of acoustic frequencies from minimal to maximal possible values in a single experimental optical configuration for the directions of probe light incidence and scattered light detection. This is achieved by monitoring the backward and forward Brillouin scattering processes in parallel. Potential applications include measurements of the acoustic dispersion, simultaneous determination of sound velocity and optical refractive index, and evaluation of samples with a single direction of possible optical access.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Time-domain Brillouin scattering assisted by diffraction gratings

et al. 2018

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“…It started in the late 1980ies with the development of ultrafast lasers and nowadays PU shows great potential for elastic nanoscopy [3] and ultrafast control of electronic and optical devices [4][5][6]. PU imaging with sub-nanometer depth resolution is used to study nanostructures including biological cells [7][8][9][10], chemical reactions [11], adhesion of nanolayers [12,13] and profile inhomogeneity [14].…”

Section: Introductionmentioning

confidence: 99%

Picosecond ultrasonics with miniaturized semiconductor lasers

et al. 2020

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There is a great desire to extend ultrasonic techniques to the imaging and characterization of nanoobjects. This can be achieved by picosecond ultrasonics, where by using ultrafast lasers it is possible to generate and detect acoustic waves with frequencies up to terahertz and wavelengths down to nanometers. In our work we present a picosecond ultrasonics setup based on miniaturized mode-locked semiconductor lasers, whose performance allows us to obtain the necessary power, pulse duration and repetition rate. Using such a laser, we measure the ultrasonic echo signal with picosecond resolution in a Al film deposited on a semiconductor substrate. We show that the obtained signal is as good as the signal obtained with a standard bulky mode-locked Ti-Sa laser. The experiments pave the way for designing integrated portable picosecond ultrasonic setups on the basis of miniaturized semiconductor lasers.

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“…For nanoscopy of buried films and interfaces, picosecond ultrasonics provides a suitable tool [6][7][8][9]. A picosecond acoustic pulse is optically generated and detected in a photonic nanostructure and allows one to derive information about the position of the internal interfaces.…”

Section: Introductionmentioning

confidence: 99%

Acousto-optical nanoscopy of buried photonic nanostructures

Czerniuk¹,

Schneider²,

Kamp³

et al. 2017

Optica

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We develop a nanoscopy method with in-depth resolution for layered photonic devices. Photonics often requires tailored light field distributions for the optical modes used, and an exact knowledge of the geometry of a device is crucial to assess its performance. The presented acousto-optical nanoscopy method is based on the uniqueness of the light field distributions in photonic devices: for a given wavelength, we record the reflectivity modulation during the transit of a picosecond acoustic pulse. The temporal profile obtained can be linked to the internal light field distribution. From this information, a reverse-engineering procedure allows us to reconstruct the light field and the underlying photonic structure very precisely. We apply this method to the slow light mode of an AlAs/GaAs micropillar resonator and show its validity for the tailored experimental conditions.

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Optical tracking of picosecond coherent phonon pulse focusing inside a sub-micron object

Cited by 29 publications

References 35 publications

Time-domain Brillouin scattering assisted by diffraction gratings

Time-domain Brillouin scattering assisted by diffraction gratings

Picosecond ultrasonics with miniaturized semiconductor lasers

Acousto-optical nanoscopy of buried photonic nanostructures

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