Narrow-band acoustic attenuation measurements in vitreous silica at frequencies between 20 and 400 GHz

Klieber, Christoph; Péronne, Emmanuel; Katayama, Kenji; Choi, Jeung‐Yoon; Yamaguchi, Masashi; Pézeril, Thomas; Nelson, Keith A.

doi:10.1063/1.3595275

Cited by 47 publications

(54 citation statements)

References 26 publications

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“…In general, the increase of the peak amplitudes would lead to the opportunity to detect the corresponding frequencies above the noise level for longer time, and, thus, to narrow the width of the Brillouin peaks and make more precise their positioning, in the case, when noise and not the inherent attenuation of the acoustic waves is the main factor of line broadening. Potentially, the so-called death-star optical scheme for the pump pulse shaping [41,48,49] could be also used for the selective enhancement of the particular Brillouin frequency, if necessary.…”

Section: Discussionmentioning

confidence: 99%

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: Discussionmentioning

confidence: 99%

Time-domain Brillouin scattering assisted by diffraction gratings

et al. 2018

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“…Many control strategies take advantage of terahertz (THz) modes of the material. An ubiquitous example is lattice vibrations (phonons) whose control by femtosecond laser pulses [4,5] has enabled new pathways to permanent material modification [6], insulator-to-metal transitions [7,8], and magnetization manipulation [2,9].…”

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confidence: 99%

Terahertz Sum-Frequency Excitation of a Raman-Active Phonon

et al. 2017

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In stimulated Raman scattering, two incident optical waves induce a force oscillating at the difference of the two light frequencies. This process has enabled important applications such as the excitation and coherent control of phonons and magnons by femtosecond laser pulses. Here, we experimentally and theoretically demonstrate the so far neglected up-conversion counterpart of this process: THz sumfrequency excitation of a Raman-active phonon mode, which is tantamount to two-photon absorption by an optical transition between two adjacent vibrational levels. Coherent control of an optical lattice vibration of diamond is achieved by an intense terahertz pulse whose spectrum is centered at half the phonon frequency of 40 THz. Remarkably, the carrier-envelope phase of the THz pulse is directly transferred into the phase of the lattice vibration. New prospects in general infrared spectroscopy, action spectroscopy, and lattice trajectory control in the electronic ground state emerge.

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“…2 Metal thin film has been widely and conveniently used as the acoustic transducer in picosecond ultrasonics, 12 but photothermal excitation, with response time of 1-2 ps, might limit the intrinsic bandwidth for either single pulses 12 or multicycle waves. 15 21 can support acoustic bandwidth up to 2 THz. 22 It should be noted that the bandwidth of acoustic spectroscopy of vitreous silica is not only limited by the generated pulses but also determined by the signal to noise ratio (SNR) of the recorded data.…”

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confidence: 99%

“…13 These techniques which utilize broadband pulse are convenient for frequency-dependent analysis in single measurement, but the obtained attenuation is higher than narrowband measurement. [14][15][16] The frequency-dependent behavior of acoustic attenuation in silica, studied by incoherent 9,17 or coherent method [18][19][20] for 100 GHz to 1 THz regime, is also controversial. The use of acoustic plane waves to study silica up to THz regime is important for several reasons.…”

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confidence: 99%

“…We believe this process have signals mostly close to real attenuation in silica, because rougher interfaces will only lead to weaker Echo 2 signals. Although 14 neutron scattering (neutron), 7 picosecond ultrasonics with narrowband pulses (PUn), 15 single quantum well (SQW), 13 picosecond ultrasonics with broadband pulses (PUb), 12 picosecond ultrasonics with Brillouin scattering detection (PUBS), 14 and multiple quantum wells (MQW). MQWc and MQWp represent the data of silica prepared CVD and PVD, respectively.…”

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confidence: 99%

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Acoustic spectroscopy for studies of vitreous silica up to 740 GHz

et al. 2013

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Due to the high attenuation in vitreous silica, acoustic attenuations in the THz regime are typically measured by incoherent techniques such as Raman, neutron, and X-ray scattering. Here, we utilized multiple-quantum-well structures to demonstrate acoustic spectroscopy of vitreous silica up to ∼740 THz. The acoustic properties of silica thin films prepared by physical and chemical deposition methods were characterized in the sub-THz regime. This technique can be useful in resolving debated issues relating to Boson peak around 1 THz.

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Narrow-band acoustic attenuation measurements in vitreous silica at frequencies between 20 and 400 GHz

Cited by 47 publications

References 26 publications

Time-domain Brillouin scattering assisted by diffraction gratings

Time-domain Brillouin scattering assisted by diffraction gratings

Terahertz Sum-Frequency Excitation of a Raman-Active Phonon

Acoustic spectroscopy for studies of vitreous silica up to 740 GHz

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