Optimization of acousto-optic interaction geometry in KRS-5 crystal for far-infrared applications

Voloshinov, V. B.; Porokhovnichenko, D. L.

doi:10.1117/1.oe.56.8.087102

Cited by 11 publications

(7 citation statements)

References 10 publications

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“…В литературе имеются значения коэффициента затухания для продольной акустической волны в зависимости от химического состава стекол системы GeSeTe [11]. Они приведены в четвертом столбце в табл.…”

Section: измерение затухания продольных и сдвиговых акустических волн в теллуровых стеклахunclassified

“…Они приведены в четвертом столбце в табл. 4 [11]. Из полученных результатов видно, что стекла обладают относительно малым затуханием для продольных акустических волн на частоте f = 100 MHz.…”

Section: измерение затухания продольных и сдвиговых акустических волн в теллуровых стеклахunclassified

“…На сегодняшний день в качестве основы для АО взаимодействия в среднем и длинноволновом диапазонах в литературе рассматривается много материалов. В их числе -кристалл теллура [7,8], кубические кристаллы на основе галогенидов таллия (KRS) [9][10][11], а также соединения на основе ртути: каломель, бромид и йодид ртути [12].…”

Section: Introductionunclassified

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Акустические и акустооптические свойства стекол Ge-=SUB=-a-=/SUB=-Se-=SUB=-b-=/SUB=-Te-=SUB=-c-=/SUB=- и Si-=SUB=-a-=/SUB=-Se-=SUB=-b-=/SUB=-Te-=SUB=-c-=/SUB=- в случае дифракции на продольных и сдвиговых акустических волнах

Khorkin¹

2021

Оптика И Спектроскопия

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We investigated acoustic and acousto-optic properties of glasses based on germanium, selenium, silicon and tellurium. The results of measurement are presented for two group of glasses including germanium, selenium and tellurium (GeSeTe) and silicon and tellurium (SiTe). The major characteristics of glasses such as the velocity of longitudinal and shear acoustic waves as well as the values of figure of merit are presented. The values of figure of merit are obtained by diffraction on longitudinal and shear acoustic waves at the wavelength of optical radiation λ = 3.39 µm. We also present the results of measurements of acoustic attenuation values α for longitudinal and shear acoustic waves in tellurium glasses at ultrasound frequencies in the range f = 75-100 MHz.

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Section: измерение затухания продольных и сдвиговых акустических волн в теллуровых стеклахunclassified

Section: Introductionunclassified

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Акустические и акустооптические свойства стекол Ge-=SUB=-a-=/SUB=-Se-=SUB=-b-=/SUB=-Te-=SUB=-c-=/SUB=- и Si-=SUB=-a-=/SUB=-Se-=SUB=-b-=/SUB=-Te-=SUB=-c-=/SUB=- в случае дифракции на продольных и сдвиговых акустических волнах

Khorkin¹

2021

Оптика И Спектроскопия

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“…Currently many materials are considered in the literature as the basis for AO interaction in the medium and long wavelength ranges. They include a tellurium crystal [7,8], cubic crystals based on thallium halides (KRS) [9][10][11], as well as mercury-based compounds: calomel, bromide and mercuric iodide [12].…”

Section: Introductionmentioning

confidence: 99%

Acoustic and acousto-optic properties of Ge-=SUB=-a-=/SUB=-Se-=SUB=-b-=/SUB=-Te-=SUB=-c-=/SUB=- and Si-=SUB=-a-=/SUB=-Se-=SUB=-b-=/SUB=-Te-=SUB=-c-=/SUB=- glasses in case diffraction on longitudinal and shear acoustic waves

V.S.

2022

Optics and Spectroscopy

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We investigated acoustic and acousto-optic properties of glasses based on germanium, selenium, silicon and tellurium. The results of measurement are presented for two group of glasses including germanium, selenium and tellurium (GeSeTe) and silicon and tellurium (SiTe). The major characteristics of glasses such as the velocity of longitudinal and shear acoustic waves as well as the values of figure of merit are presented. The values of figure of merit are obtained by diffraction on longitudinal and shear acoustic waves at the wavelength of optical radiation λ = 3.39 μm. We also present the results of measurements of acoustic attenuation values α for longitudinal and shear acoustic waves in tellurium glasses at ultrasound frequencies in the range f = 75-100 MHz. Keywords: acousto-optics, acousto-optic figure of merit, germanium, selenium, silicon, tellurium, attenuation acoustic waves.

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“…Since the efficiency of the acousto-optic interaction decreases in the quadratic law with the wavelength growth the materials with extremely high acousto-optic figure of merit are necessary. Some of the unconventional materials proposed for such applications include single crystal tellurium [4][5], KRS-5 crystals [6], crystal iodic acid and lithium iodate [7]. Besides, the problem of operation at gigahertz frequencies is also quite challenging.…”

Section: Introductionmentioning

confidence: 99%

Efficient Acousto-Optical Light Modulation at the Mid-Infrared Spectral Range by Planar Semiconductor Structures Supporting Guided Modes

et al. 2020

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Acousto-optical devices, such as modulators, filters or deflectors, implement a simple and effective way of light modulation and signal processing techniques. However, their operation wavelengths are restricted to visible and near-infrared frequency region due to a quadratic decrease of the efficiency of acousto-optical interaction with the wavelength increase. At the same time, almost all materials with high value of acousto-optic figure of merit are non-transparent at wavelengths larger than 5 µm, while the transparent materials possess significantly lower acousto-optic figure of merit. Here we propose and demonstrate by calculations how these limitations could be overcome using specially designed planar semiconductor structures supporting electromagnetic modes strongly coupled to the incident light in the Otto configuration. Such approach could be used for a novel efficient acousto-optical device operating in middle infrared range of 8-14 µm. Acoustic wave excited by a piezoelectric transducer in a semi-conductor prism is utilized to modulate the coupling coefficient of the incident light to the semiconductor structure which results in up to 100% modulation of the transmitted light at the spatial scale less than the ultrasound wavelength. It allows to utilize acoustic waves with short decay distance and therefore, it provides a unique possibility to achieve an efficient acousto-optical modulation at frequencies over several gigahertz, which are unreachable for traditional acousto-optics.

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Optimization of acousto-optic interaction geometry in KRS-5 crystal for far-infrared applications

Cited by 11 publications

References 10 publications

Acoustic and acousto-optic properties of Ge-=SUB=-a-=/SUB=-Se-=SUB=-b-=/SUB=-Te-=SUB=-c-=/SUB=- and Si-=SUB=-a-=/SUB=-Se-=SUB=-b-=/SUB=-Te-=SUB=-c-=/SUB=- glasses in case diffraction on longitudinal and shear acoustic waves

Efficient Acousto-Optical Light Modulation at the Mid-Infrared Spectral Range by Planar Semiconductor Structures Supporting Guided Modes

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