Laser-induced piezoelectric effects in chalcogenide crystals

Kityk, I.V.; Alzayed, Nasser S.; Rakus, P.; AlOtaibe, A.A.; El‐Naggar, A. M.; Parasyuk, O.V.

doi:10.1016/j.physb.2013.04.043

Cited by 17 publications

(8 citation statements)

References 16 publications

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“…Тетрарний халькогенідний монокристал AgGaGe 3 Se 8 володіє хорошими оптичними [5], електричними [6], п'єзоелектричними [7] та нелінійно оптичними [8] властивостями.…”

Section: вступunclassified

“…1 представлені розраховані за допомогою формули (2) параматери правила Урбаха. Велике значення E U вказує на те, що даний монокристал по своїй структурі наближаються до невпорядкованих систем, як і вихідний кристал AgGaGe 3 Se 8 [6]. Використовуючи запропоновану у [19] теоретичну модель для невпорядкованих напівпровідників та експериметально визначенні значення енергії Урбаха, розрахована концентрація заряджених дефектних центрів n t (однозарядні точкові дефектні центри), які модулюють край поглинання у досліджуваному монокристалі (табл.…”

Section: методика та техніка експериментуunclassified

“…1). Отримане значення n t у 10 2 разів менше концентрації вакансій Ag визначених з рентгеноструктурного аналізу кристалу AgGaGe 3 Se 8 [6]. Таким чином, основна частина вакансій срібла може знаходитись у нейтральному стані, тобто бути заповненою дірками.…”

Section: методика та техніка експериментуunclassified

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Optical Absorption and Piezoelectric Effect Investigation in Single Crystal of AgGaGe3Se7.6Te0.4 Solid Solution

Krymus¹,

Myronchuk²,

Parasyuk³

et al. 2016

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In present work spectral distribution of absorption coefficient in the range of 100 – 300 K was investigated and band gap values evaluated. Parameters of Urbach rule were calculated and linearity of temperature dependence of Urbach energy was showed. Thermo induced piezoelectric effect in a range of 297 ‑ 357 K was investigated. Laser induced kinetics of piezomodule was investigated and absence of irreversible changes was showed. Influence of heating the crystal during laser illuminating on piezoelectric module was adjusted.

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Section: вступunclassified

Section: методика та техніка експериментуunclassified

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Optical Absorption and Piezoelectric Effect Investigation in Single Crystal of AgGaGe3Se7.6Te0.4 Solid Solution

Krymus¹,

Myronchuk²,

Parasyuk³

et al. 2016

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“…In this work due to coexistence of two cations (Pb and Ag) one can expect an occurrence of nonlinear (nonmonotonous) laser energy dependence with respect to piezoelectricity. Among the mechanisms defining the observed effect it should be point out the photoinduced polarizablity, excitation of the anharmonic phonons, photoinduced space charge density acentricity [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Laser operated piezoelectricity in Ag0.5Pb1.75GeS4 and Ag0.5Pb1.75GeS3Se crystals

Kogut

Fedorchuk

Parasyuk

et al. 2016

J Mater Sci: Mater Electron

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Bicolour illumination by 1.54/0.77 lm 20 ns pulsed Er:glass laser beams leads to enhancement of the initial effective piezoelectric coefficients for Ag 0.5 Pb 1.75 GeS 4 and Ag 0.5 Pb 1.75 GeS 3 Se crystals in a different way. The contribution of the photo-thermal effect did not exceed 4 %. The relaxation processes last up to 50 ms and are completely reversible with respect to piezoelectricity. The effect is reproducible even after more than 100 cycles of the photoinduced laser treatment. The use only of the mopnochromatic wavelengths 1.54 lm (0.77 lm) did not show sufficient enhancement of the effect, and the changes were commensurable with the background. The efficiency of the laser photoinduced treatment depends on the angle between the bicolour photoinducing beams, ratio of their intensities and their relaxation behaviour is a slightly different. However, at at 50 ms the photoinduced piezoelectric signal disappears for the both samples. It is crucial that laser polarizations of the photoinducing beams do not play important role.

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“…Their refractive indices are equal to a n = 2.799, b n = 2.791 and c n = 2.627 at 600 nm   [3]. The main bulk of the data obtained for the Ag x Ga x Ge 1-x Se 2 crystals has been devoted to the electronic band structure [4], the absorption spectra [15], and the laser-induced phenomena [16][17][18][19]. Moreover, the crystals have been thoroughly investigated from the viewpoint of their nonlinear optical properties, which may prove promising for the optical frequency doubling.…”

Section: Introductionmentioning

confidence: 99%

Acoustic anisotropy of AgGaGe3Se8 crystals and their acoustooptic applications

Martynyuk-Lototska¹,

Myronchuk²,

Kushnirevych³

et al. 2015

Ukr. J. Phys. Opt.

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Abstract.We present the studies of anisotropy of acoustic wave (AW) propagation in AgGaGe 3 Se 8 crystals. Complete matrices of mechanical stiffness and compliance coefficients are determined basing on the experimental values of AW velocities. Cross sections of AW velocity surfaces by the principal crystallographic planes are obtained. We have found that the velocities of quasi-transverse and quasilongitudinal AWs propagating in the AgGaGe 3 Se 8 crystals can be very low, thus facilitating potentially high acoustooptic figures of merit.

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Laser-induced piezoelectric effects in chalcogenide crystals

Cited by 17 publications

References 16 publications

Optical Absorption and Piezoelectric Effect Investigation in Single Crystal of AgGaGe3Se7.6Te0.4 Solid Solution

Optical Absorption and Piezoelectric Effect Investigation in Single Crystal of AgGaGe3Se7.6Te0.4 Solid Solution

Laser operated piezoelectricity in Ag0.5Pb1.75GeS4 and Ag0.5Pb1.75GeS3Se crystals

Acoustic anisotropy of AgGaGe3Se8 crystals and their acoustooptic applications

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