Low temperature ultrasonic study of BNaOBiNb glasses

Mahmoud, I.S.; Saddeek, Yasser B.; Saddek, Amr B.

doi:10.1016/j.ceramint.2020.06.241

Cited by 4 publications

(2 citation statements)

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“…The α of Se‐based glasses at different ultrasonic frequencies is overall lower than that of Te‐based glasses, and the differences in the α of glasses at 10 and 30 MHz are greater than those at lower frequencies, which show that the damping effect of atomic vibration is more significant at high frequencies. That is, high‐frequency ultrasound changes the frequency of the phonon mode and disturbs the balance distribution of the thermal phonons, resulting in shorter ultrasound wavelength, weaker diffraction ability inside amorphous materials, and lager ultrasound energy loss during direct penetration 45 . Hence, the result proves that the acoustic stability of Ge 10 As 20 Te 70−y Se y glasses is relatively better than that of Ge 10 As 90− x Te x glasses.…”

Section: Resultsmentioning

confidence: 86%

“…That is, highfrequency ultrasound changes the frequency of the phonon mode and disturbs the balance distribution of the thermal phonons, resulting in shorter ultrasound wavelength, weaker diffraction ability inside amorphous materials, and lager ultrasound energy loss during direct penetration. 45 Hence, the result proves that the acoustic stability of Ge 10 As 20 Te 70−y Se y glasses is relatively better than that of Ge 10 As 90−x Te x glasses.…”

Section: Acoustic Propertiesmentioning

confidence: 75%

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Investigation of the acousto‐optical properties of Ge–As–Te–(Se) chalcogenide glasses at 10.6 μm wavelength

et al. 2021

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Acousto-optic interactions based on the diffraction of light by acoustic waves have been widely applied to acousto-optic modulators, acousto-optic deflectors, and acousto-optic Q-switch since the advent of lasers. [1][2][3][4] Materials with high acousto-optic figures of merit have been employed to further improve the performance of various acousto-optic devices. Chalcogenide glasses are considered outstanding infrared acousto-optic media on account of their excellent infrared transparency and high figures of merit M 2 (M 2 = n 6 P 2 12 ∕ V 3 L ,where n denotes the refraction index, P 12 denotes the photoelastic coefficient, ρ is the material density, and V L is the ultrasonic wave velocity). 5,6 Moreover, the optimization of the acousto-optic parameters of glasses can be achieved by adjusting its composition. After annealing, glasses have good optical quality and are prone to process in large areas, which are suitable as media for various acousto-optic devices. For example, Ga-La-S glass was used for acousto-optic deflector at 0.63 μm, 7 As 2 Se 3 glass was used for acousto-optic modulator at 1.06 μm, 8 and Si-Te alloy was used for acousto-optic cell at 3.39 μm 9 etc.

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Section: Resultsmentioning

confidence: 86%

Section: Acoustic Propertiesmentioning

confidence: 75%