Оптика и спектроскопия最新文献

Релятивистские расчеты энергий низко возбужденных состояний 1sns, 1snp, 1snd и вероятностей однофотонных переходов 1snl -> 1sn'l' в гелиеподобном ионе урана 低激发性状态1sns、1snp、1snd和氦型铀单光子跃迁概率相对论计算

Оптика и спектроскопия Pub Date : 2023-02-28 DOI: 10.21883/OS.2023.03.55379.4569-22

N. Dulaev, M. Y. Kaygorodov, A. Malyshev, I. Tupitsyn, V. Shabaev

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Определение концентрации электронов проводимости в монокриcталлических образцах n-GaSb по спектрам отражения в дальней инфракрасной области при T=295 K 在T=295 K下，n-GaSb远红外反射光谱测定导电性电子浓度

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.07.56126.4318-23

А. Г. Белов, Е. В. Молодцова, С.С. Кормилицина, Р. И. Козлов, Е.О. Журавлев, Степан Андреевич Климин, Надежда Николаевна Новикова, В. А. Яковлев

{"title":"Определение концентрации электронов проводимости в монокриcталлических образцах n-GaSb по спектрам отражения в дальней инфракрасной области при T=295 K","authors":"А. Г. Белов, Е. В. Молодцова, С.С. Кормилицина, Р. И. Козлов, Е.О. Журавлев, Степан Андреевич Климин, Надежда Николаевна Новикова, В. А. Яковлев","doi":"10.21883/os.2023.07.56126.4318-23","DOIUrl":"https://doi.org/10.21883/os.2023.07.56126.4318-23","url":null,"abstract":"A method is proposed for separately determining the concentrations of \"light\" and \"heavy\" electrons in n-GaSb. It is based on the analysis of reflection spectra in the far infrared region, taking into account the plasmon-phonon coupling. Calibration curves have been calculated that allow one to determine the concentrations of \"light\" and \"heavy\" electrons in GaSb using the frequency of high-energy coupled plasmon-phonon mode. For a series of n-GaSb samples the reflection spectra were measured and the concentrations of \"light\" and \"heavy\" electrons were determined at room temperature. Electrophysical Van der Paw measurements have been performed on the same samples at room temperature. By comparing the optical and Hall data, the ratios of the mobilities of \"light\" and \"heavy\" electrons (parameter b) were determined. This method of determining the value of the parameter b is used for the first time.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"141 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75695730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Спектроскопия спиновых флуктуаций редкоземельных ионов в кристаллах 晶体中稀土离子自旋波动光谱学

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.04.55545.64-22

Валерий Сергеевич Запасский

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Спектры оптических гармоник 2 и 3/2 при субрелятивистской лазерно-плазменной генерации рентгеновского излучения 光谐波谱2和3/2与亚伯拉底激光等离子体x射线产生有关

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.02.55003.19-23

М В Чащин, П. А. Щеглов, А.А. Таусенев, Михаил Михайлович Назаров, В.М. Гордиенко

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Экситоны с переносом заряда в ВТСП купратах и никелатах 电荷转移到cprt和镍的轴突

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.04.55553.70-22

А. С. Москвин

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Теоретическое исследование магнитно-резонансных спектров псевдоперовскитных фрустрированных манганитов 假佩罗托酸性果蝠核磁共振光谱的理论研究

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.04.55554.57-22

Л. Э. Гончарь

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Трансформации спектров фотолюминесценции наноразмерных апконвертирующих фосфоров фантомами биологических тканей 生物组织纳米近变磷酸盐光照发光谱变换

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.06.55912.124-23

Е.М. Трифанова, Марина Юрьевна Николаева, А. П. Свиридов, Владимир Карпович Попов

{"title":"Трансформации спектров фотолюминесценции наноразмерных апконвертирующих фосфоров фантомами биологических тканей","authors":"Е.М. Трифанова, Марина Юрьевна Николаева, А. П. Свиридов, Владимир Карпович Попов","doi":"10.21883/os.2023.06.55912.124-23","DOIUrl":"https://doi.org/10.21883/os.2023.06.55912.124-23","url":null,"abstract":"Phantoms are often used to imitate biological tissues in laboratory conditions. Phantoms are usually made on the basis of natural and synthetic materials, as well as hydrogels and various bioactive compositions. Today to visualize biological tissues and study the processes occurring to them in in vitro and in vivo researches in real time, upconversion nanophosphors (UCNPs) are actively used. They have a whole set of unique photoluminescent properties and are promising components of modern tools for non-invasive optical diagnostics of the human and animals body. We have carried out the synthesis and complex characterization of β-NaYF4:Yb3+:Er3+/NaYF4 nanoparticles, which effectively convert radiation from the near-IR range into the visible region of the spectrum. The process has been developed to encapsulate them into the structure of aliphatic polyesters and to form bioresorbable polylactoglycolide scaffolds by anti-solvent 3D printing. We formed two types of tissue phantoms based on agarose, ultra-pasteurized cow's milk and melanin. Characterization and analysis of their optical properties were carried out. We studied the transformations of the photoluminescence spectrum of the synthesized UCNPs during the passage of their radiation through these phantoms, and performed the visualization of the photoluminescent polyester matrices placed in them.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85440673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Ап-конверсионная люминесценция твердых растворов CaF-=SUB=-2-=/SUB=--SrF-=SUB=-2-=/SUB=--HoF-=SUB=-3-=/SUB=- при возбуждении на уровень -=SUP=-5-=/SUP=-I-=SUB=-7-=/SUB=- ионов Ho-=SUP=-3+-=/SUP=- CaF- 2-= -2-= - SUB -2-= -2-= -2-= -3-= - SUB -3-= -3-= -3-= - SUP=- 7- SUP=- 7

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.03.55384.4085-22

М.К. Бубнов, С.А. Букарев, Сергей Викторович Гущин, Василий Андреевич Конюшкин, Сергей Валентинович Кузнецов, Александр Александрович Ляпин, A.H. Накладов, П. А. Рябочкина, В. В. Воронов, П. П. Федоров

{"title":"Ап-конверсионная люминесценция твердых растворов CaF-=SUB=-2-=/SUB=--SrF-=SUB=-2-=/SUB=--HoF-=SUB=-3-=/SUB=- при возбуждении на уровень -=SUP=-5-=/SUP=-I-=SUB=-7-=/SUB=- ионов Ho-=SUP=-3+-=/SUP=-","authors":"М.К. Бубнов, С.А. Букарев, Сергей Викторович Гущин, Василий Андреевич Конюшкин, Сергей Валентинович Кузнецов, Александр Александрович Ляпин, A.H. Накладов, П. А. Рябочкина, В. В. Воронов, П. П. Федоров","doi":"10.21883/os.2023.03.55384.4085-22","DOIUrl":"https://doi.org/10.21883/os.2023.03.55384.4085-22","url":null,"abstract":"Up-conversion luminescence spectra of CaF2-SrF2-HoF3 single crystals were investigated upon excitation by laser radiation with a wavelength of 1940 nm to the 5I7 level of Ho3+ ions. The CaF2-SrF2-HoF3 single crystals were grown by the vertical directional crystallization method. For these excitation conditions, quantitative characteristics of the up-conversion luminescence of Ho3+ ions were determined: energy yield, chromaticity coordinates, and correlated color temperatures. The possibility of increasing the efficiency of solar cells due to the conversion of infrared radiation in CaF2-SrF2-HoF3 crystals was considered.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78512532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Сочетание полого сапфирового волновода и иммерсионной линзы для ТГц эндоскопии сверхвысокого разрешения 超高分辨率中空蓝宝石波导与浸润透镜结合

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.06.55925.123-23

А. С. Кучерявенко, В.А. Желнов, Н.В. Черномырдин, В. Н. Курлов, К. И. Зайцев, Г.М. Катыба

{"title":"Сочетание полого сапфирового волновода и иммерсионной линзы для ТГц эндоскопии сверхвысокого разрешения","authors":"А. С. Кучерявенко, В.А. Желнов, Н.В. Черномырдин, В. Н. Курлов, К. И. Зайцев, Г.М. Катыба","doi":"10.21883/os.2023.06.55925.123-23","DOIUrl":"https://doi.org/10.21883/os.2023.06.55925.123-23","url":null,"abstract":"The development of terahertz (THz) imaging methods is hampered by the low spatial resolution of traditional diffraction-limited imaging systems, mainly due to the large wavelength of used radiation (from a few of mm to tens of µm). To solve this problem, we have proposed a new method of THz endoscopy with subwavelength spatial resolution, which is designed to study hard-to-reach areas of living organisms in vivo. A hollow-core sapphire tube with polytetrafluoroethylene outer coating is used as a waveguide, in which the antiresonant principle of radiation transmission is implemented. The waveguide and the immersion lens are optimized to provide high optical characteristics in a given wavelength range to ensure the best focusing. Two immersion lenses made of sapphire and silicon were developed and fabricated, which were then mounted on plane-parallel windows fixed on the rear end of the waveguide. The study of the field intensity distribution on the shadow side of the “waveguide–lens” system revealed a focal spot diameter of ≃0.2λ in the case of a lens made of sapphire and ≃0.3λ in the case of a lens made of crystal silicon at a wavelength λ = 500 µm, which significantly exceeds the Abbe diffraction limit. This agrees with our numerical predictions and demonstrates the promise of using the proposed endoscope for measurements with subwavelength resolution.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"129 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78939999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Датчик угла поворота на основе одномерного фотонного кристалла с дефектом 单维光子晶体缺陷转角传感器

Оптика и спектроскопия Pub Date : 2023-01-01 DOI: 10.21883/os.2023.07.56141.4568-23

Алексей Иванович Сидоров, Александр Александрович Ефимов

{"title":"Датчик угла поворота на основе одномерного фотонного кристалла с дефектом","authors":"Алексей Иванович Сидоров, Александр Александрович Ефимов","doi":"10.21883/os.2023.07.56141.4568-23","DOIUrl":"https://doi.org/10.21883/os.2023.07.56141.4568-23","url":null,"abstract":"Представлены результаты численного моделирования оптических свойств одномерного (1D) фотонного кристалла с дефектом на основе слоев полупроводник-диэлектрик в ближнем ИК диапазоне. При моделировании использовались слои кремния и диоксида кремния с оптической толщиной 3λ/4, λ/4 и 10λ/4. Изучено влияние угла падения излучения на спектральное положение полосы пропускания дефекта. Показано, что чувствительность к углу поворота лежит в пределах 6-20 nm/deg и 1.7-5.5 dB/deg в зависимости от геометрии датчика и метода измерений. Это делает данные фотонные кристаллы перспективными для использования в датчиках угла поворота в качестве чувствительного элемента. Ключевые слова: датчик угла поворота, угол падения, фотонный кристалл, фотонная запрещенная зона, передаточная матрица.","PeriodicalId":24059,"journal":{"name":"Оптика и спектроскопия","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77319718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0