Optical Materials: X最新文献

Study of the applicability of ACdSe (A – Co, Ni) thin films as catalysts for heavy metal capture 研究 ACdSe（A - Co、Ni）薄膜作为重金属捕获催化剂的适用性

Q2 Engineering

Optical Materials: X

Pub Date : 2024-09-29 DOI: 10.1016/j.omx.2024.100366

Expansion of the possibilities of using photoactive thin films with a unique combination of optical and morphological characteristics as a basis for creation of highly efficient catalysts for the aqueous media purification is one of the promising research areas in modern materials science, which has both fundamental significance and potential for practical application. This study examines the prospects for using modified thin CdSe films by substituting nickel or cobalt for cadmium and selenium as a basis for creating highly efficient catalysts for the aqueous media purification from heavy metals such as arsenic, manganese and iron. A rather inexpensive electrochemical synthesis method was proposed as a method for obtaining thin films, in which the substitution effect is achieved by addition of nickel or cobalt sulfates to the electrolyte, which allows obtaining films with an equally probable distribution of elements in the composition of the synthesized films. Optical spectroscopy methods were used as methods for characterization of the initial samples, which made it possible to establish the dependences of the change in the band gap and absorption bands on the composition of the synthesized films, as well as to anticipate the influence of morphological features on optical absorption. During the conducted studies it was established that partial substitution of nickel and cobalt for cadmium and selenium in the composition of films results in growth in the adsorption efficiency of heavy metals, alongside operation stability maintenance of modified films during cyclic tests. At the same time, enhancement of the adsorption efficiency of heavy metals for modified films is due to both an alteration in the optical properties of the films and morphological features associated with the specific surface area growth due to a reduction in the grain size and a more developed surface.

将具有独特光学和形态特征组合的光活性薄膜作为制造用于水介质净化的高效催化剂的基础，是现代材料科学中前景广阔的研究领域之一，具有基础意义和实际应用潜力。本研究探讨了以镍或钴替代镉和硒的改性 CdSe 薄膜的应用前景，并以此为基础开发了用于水介质净化的高效催化剂，以去除砷、锰和铁等重金属。在这种方法中，通过在电解液中添加镍或钴硫酸盐来实现替代效应，从而获得在合成薄膜的成分中元素分布可能性相同的薄膜。光学光谱法被用作初始样品的表征方法，从而可以确定带隙和吸收带的变化与合成薄膜成分的关系，并预测形态特征对光学吸收的影响。研究结果表明，用镍和钴部分替代镉和硒会提高薄膜对重金属的吸附效率，并在循环测试中保持改性薄膜的运行稳定性。同时，改性薄膜重金属吸附效率的提高既是由于薄膜光学特性的改变，也是由于晶粒尺寸的减小和表面更发达所导致的与比表面积增长有关的形态特征。

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引用次数: 0

The connection between the accumulation of structural defects caused by proton irradiation and the destruction of the near-surface layer of Li4SiO4 – Li2TiO3 ceramics 质子辐照导致的结构缺陷积累与 Li4SiO4 - Li2TiO3 陶瓷近表层破坏之间的联系

Q2 Engineering

Optical Materials: X

Pub Date : 2024-09-26 DOI: 10.1016/j.omx.2024.100367

The key problem of using lithium-containing ceramics as materials of breeders for the propagation of tritium in thermonuclear reactors is phase stability, as well as the preservation of strength and thermophysical parameters of ceramics during their operation, which is accompanied by the accumulation of fission products in the near-surface layers, alongside mechanical influences from the outside. Moreover, in contrast to other types of ceramics, the presence of lithium in the composition of the samples under study leads to limitations in the use of classical analysis methods (scanning electron microscopy, energy dispersive analysis or optical spectroscopy) of structural changes caused by the accumulation of radiation damage, which requires the use of more complex methods for the assessment of the defect concentration in the structure, as well as establishing their relationship with the deterioration of strength and thermophysical parameters, playing a key role in determining the stability mechanisms and further exploitation of ceramics for tritium production. In this regard, the aim of the study is to determine the kinetics of changes in the near-surface layer of two-phase Li₄SiO₄ – Li₂TiO₃ ceramics associated with the accumulation of structural distortions caused by irradiation, as well as their relationship with strain embrittlement and disorder. During the studies, it was found that the accumulation of implanted hydrogen in the near-surface layer under high-dose irradiation initiates deformation distortion processes, the intensity of which depends on the ratio of components in the ceramics, according to which the optimal compositions of two-phase ceramics are ratios of components from 0.3 to 0.6. Determination of the type of defects in the composition of the damaged layer, as well as their concentration, was carried out using the electron spin resonance (ESP) method. During the studies, it was found that at low irradiation fluences, the dominant role in the accumulation of structural defects is played by vacancy defects associated with E′-centers, the formation of which is associated with structural distortions, while as the fluence grows, the structure is dominated by deformation disordering caused by the accumulation of Ti³⁺ defects and HC₂ centers (SiO₄ ^3-), the concentrations of which have a clear dependence on the phase composition of the ceramics.

在热核反应堆中使用含锂陶瓷作为氚传播的增殖体材料的关键问题是相稳定性，以及陶瓷在运行过程中强度和热物理参数的保持问题，在运行过程中，伴随着裂变产物在近表面层的积累，以及来自外部的机械影响。此外，与其他类型的陶瓷相比，所研究样品的成分中含有锂，这就限制了使用传统分析方法（扫描电子显微镜、能量色散分析或光学光谱学）来分析辐射损伤积累所造成的结构变化，这就需要使用更复杂的方法来评估结构中的缺陷浓度，并确定它们与强度和热物理参数恶化之间的关系，这在确定稳定机制和进一步利用陶瓷生产氚方面起着关键作用。为此，本研究旨在确定两相 Li4SiO4 - Li2TiO3 陶瓷近表层与辐照引起的结构畸变累积相关的变化动力学，以及它们与应变脆化和无序的关系。研究发现，在高剂量辐照下，植入氢在近表面层的积累会引发变形畸变过程，其强度取决于陶瓷中的成分比例，根据该比例，两相陶瓷的最佳成分比例为 0.3 至 0.6。使用电子自旋共振（ESP）方法确定了受损层成分中的缺陷类型及其浓度。研究发现，在低辐照通量下，与 E′-中心相关的空位缺陷在结构缺陷积累中起主导作用，其形成与结构畸变有关，而随着通量的增加，结构则以 Ti3+ 缺陷和 HC2 中心（SiO4 3-）积累引起的变形无序为主，其浓度与陶瓷的相组成有明显的相关性。

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引用次数: 0

Low temperature recombination luminescence of Mg3Y2Ge3O12:Tb3+ Mg3Y2Ge3O12:Tb3+ 的低温重组发光

Q2 Engineering

Optical Materials: X

Pub Date : 2024-09-26 DOI: 10.1016/j.omx.2024.100368

A study was conducted to examine the recombination processes in persistent phosphor Mg₃Y₂Ge₃O₁₂:Tb³⁺ garnet at low temperatures. Photoluminescence (PL), recombination luminescence (RL), electron paramagnetic resonance (EPR), and EPR detected by PL or RL were measured.

In samples with low Tb³⁺ concentration, a broad PL and RL band around 400–450 nm and characteristic Tb³⁺ lines were observed. However, in samples with high Tb³⁺ concentration, only Tb³⁺ lines were present. Both the broad-band and the line components exhibit long-lasting tunneling luminescence with hyperbolic decay. After 263 nm UV irradiation signals of intrinsic electron (F-type) and hole (V-type) trapping centres were observed in the EPR spectra. Such signals were also observed in RL-detected EPR spectra, indicating that the broad RL band at low Tb³⁺ concentrations originates from tunneling recombination between these intrinsic traps. At high Tb³⁺ concentrations, the RL-EPR spectrum was not observed, suggesting that intrinsic electron and Tb-related hole trapping centres probably participate in the tunneling recombination.

为了研究低温条件下持久性荧光粉 Mg3Y2Ge3O12:Tb3+ 石榴石中的重组过程，我们进行了一项研究。测量了光致发光（PL）、重组发光（RL）、电子顺磁共振（EPR）以及通过 PL 或 RL 检测到的 EPR。然而，在 Tb3+ 浓度较高的样品中，只出现了 Tb3+ 线。宽带和线成分都呈现出双曲线衰减的长效隧道发光。263 纳米紫外线照射后，在 EPR 光谱中观察到了固有电子（F 型）和空穴（V 型）捕获中心的信号。在 RL 检测到的 EPR 光谱中也观察到了此类信号，这表明低浓度 Tb3+ 时的宽 RL 波段源于这些固有陷阱之间的隧道重组。在 Tb3+ 浓度较高时，没有观察到 RL-EPR 光谱，这表明本征电子和与 Tb 有关的空穴捕获中心可能参与了隧道重组。

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引用次数: 0

Latent fingerprint detection and identification using yellow-emitting YOF:Pr3+ nanophosphor 使用黄色发光 YOF:Pr3+ 纳米荧光粉检测和识别潜伏指纹

Q2 Engineering

Optical Materials: X

Pub Date : 2024-09-24 DOI: 10.1016/j.omx.2024.100364

In this study, YOF:Pr³⁺ nanophosphors were synthesized using the microwave-assisted hydrothermal route. The structural and morphological properties of the nanophosphors calcined at different temperatures were studied in detail to optimize the synthesis conditions. The visible region and near-infrared (NIR) photoluminescence (PL) properties of the nanophosphors were obtained. Intense emission bands were observed in the blue and red regions under 250 nm excitation. The CIE chromaticity diagram showed that the color coordinates of the nanophosphors were located in the yellow region. The optimum Pr³⁺-concentration was found to be 0.002 mol fraction. The application of YOF: 0.002 Pr³⁺ nanophosphor for latent fingerprint detection was examined and evaluated on different types of surfaces. The nanophosphor demonstrated excellent adherence to the ridge patterns and sufficient sensitivity required for distinguishing between the ridges and the furrows. Different levels of detail were also observed that provided necessary information for the individualization of the fingerprints. The results suggest that the prepared YOF:Pr³⁺ nanophosphor can be a potential candidate for the rapid visualization and detection of latent fingerprints.

本研究采用微波辅助水热法合成了 YOF:Pr3+ 纳米磷酸盐。为优化合成条件，详细研究了不同温度下煅烧的纳米磷酸盐的结构和形貌特性。获得了纳米磷的可见光区和近红外（NIR）光致发光（PL）特性。在 250 nm 的激发下，在蓝色和红色区域观察到了强烈的发射带。CIE 色度图显示，纳米磷的色坐标位于黄色区域。最佳的 Pr3+ 浓度为 0.002 摩尔分数。研究人员对 YOF: 0.002 Pr3+ 纳米荧光粉在不同类型表面的潜伏指纹检测中的应用进行了研究和评估。纳米荧光粉对脊纹图案的附着力极佳，并具有区分脊纹和沟纹所需的足够灵敏度。此外，还观察到不同程度的细节，这些细节为指纹的个性化提供了必要的信息。结果表明，制备的 YOF:Pr3+ 纳米荧光粉有可能成为快速显现和检测潜伏指纹的候选材料。

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引用次数: 0

Threshold phenomena in photoluminescence of upconversion micro- and nanophosphors containing Er3+ and Yb3+ ions 含有 Er3+ 和 Yb3+ 离子的上转换微纳米磷的光致发光阈值现象

Q2 Engineering

Optical Materials: X

Pub Date : 2024-09-24 DOI: 10.1016/j.omx.2024.100363

During electron beam evaporation of green-emitting (λ_ex = 980 nm) silicate upconversion (UC-PL) bulk phosphors Sr₂Y_6.8YbEr_0.2Si₆O₂₆, amorphous nanoparticles of size 2.7 nm are formed. The nanoparticles are globules formed during condensation of chains consisting of SiO₄ tetrahedra. When the globules are excited with radiation of λ_ex = 980 nm, the luminescence color becomes red and its intensity increases 80 times compared with bulk phosphors. It has been shown that luminescence is influenced by nonradiative processes between different transitions of Er³⁺ ions. There is a threshold population of the Er³⁺ and Yb³⁺ levels (level ²F_5/2) in the region of relatively low pumping powers. Above this threshold, a sharp increase in the intensity of upconversion photoluminescence occurs. We show that the produced nanophosphors have a core consisting of a combination of SiO tetrahedra (n = 0, 1, 2), while Er, Yb, Sr, and Y ions are on the surface of the globules. Owing to this structure of the globules, the interaction of Er and Yb ions with nucleus defects, which usually suppress the luminescence, decreases. Probably, for this reason the luminescence intensity increases. Our findings reveal that new effective non-linear materials can be designed for converting IR radiation into visible radiation. The produced effective phosphors can hold promise as fluorescent probes in bioresearch, for fundamental therapy, as well as for new display technologies.

在电子束蒸发绿色发光（λex = 980 nm）硅酸盐上转换（UC-PL）块状荧光粉 Sr2Y6.8YbEr0.2Si6O26 的过程中，形成了尺寸为 2.7 nm 的无定形纳米颗粒。这些纳米颗粒是由 SiO4 四面体组成的链在缩聚过程中形成的球状物。当用波长为 λex = 980 纳米的辐射激发球状颗粒时，发光颜色变为红色，其强度比块状荧光粉增加了 80 倍。研究表明，发光受 Er3+ 离子不同转变之间非辐射过程的影响。在泵浦功率相对较低的区域，Er3+ 和 Yb3+ 电平（2F5/2 电平）存在一个阈值。在该阈值之上，上转换光致发光的强度会急剧增加。我们的研究表明，所产生的纳米荧光粉具有一个由 SiO 四面体（n = 0、1、2）组合而成的核心，而 Er、Yb、Sr 和 Y 离子则位于球状荧光粉的表面。由于这种球状结构，Er 和 Yb 离子与核缺陷的相互作用减弱，而核缺陷通常会抑制发光。可能正是由于这个原因，发光强度才会增加。我们的研究结果表明，可以设计出新的有效非线性材料，用于将红外辐射转化为可见辐射。生产出的有效荧光粉有望成为生物研究、基础治疗以及新型显示技术中的荧光探针。

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引用次数: 0

Thin film deposition of organic-inorganic quinoline-tin dioxide p-n junction for optoelectronic devices 用于光电设备的有机-无机喹啉-二氧化锡 p-n 结的薄膜沉积

Q2 Engineering

Optical Materials: X

Pub Date : 2024-09-19 DOI: 10.1016/j.omx.2024.100361

Tin dioxide (SnO₂) is an oxide semiconductor with n-type characteristics, with high transparency in the UV–Vis, where the donors are usually associated with oxygen vacancies and interstitial tin ions. Quinoline derivatives (QD) are usually p-type semiconductors with emission in the blue range. We report photo-induced properties of the QD 4-(6-(diethylamino)-4-phenylquinolin-2-yl)benzoic acid and the combination with the inorganic semiconductor oxide SnO₂, both layers in the form of thin film, which forms a heterostructure. Thin film is a very convenient format for integration in optoelectronics. Emission of the QD takes place in blue range (470–485 nm) and depends on the solvent when in solution, being used acetone and tetrahydrofuran (THF). However, when in the form of thin film, it does not depend on the solvent. Concerning the heterostructure, it is explored under distinct device architecture: 1) combination in a transport profile perpendicular to the films (transverse contacts) leading to a rectifying behavior similar to a p-n junction, which is evidence of the p-type-like electrical behavior of the QD; 2) in parallel conduction profile, where there seems to exist some sort of interfacial phenomenon similar to a two-dimensional electron gas (2-DEG), a property that can be explored in transparent high-mobility transistors.

二氧化锡（SnO2）是一种具有 n 型特性的氧化物半导体，在紫外可见光下具有高透明度，其供体通常与氧空位和间隙锡离子有关。喹啉衍生物（QD）通常是 p 型半导体，在蓝色范围内发光。我们报告了 4-(6-(二乙基氨基)-4-苯基喹啉-2-基)苯甲酸喹啉衍生物的光诱导特性以及与无机半导体氧化物 SnO2 的结合。薄膜是一种非常方便的光电集成形式。QD 的发射波长在蓝色范围（470-485 nm）内，取决于溶液中使用的溶剂，如丙酮和四氢呋喃（THF）。然而，当以薄膜形式存在时，则与溶剂无关。关于异质结构，我们在不同的设备结构下进行了探索：1）垂直于薄膜（横向接触）的传输剖面组合，导致类似 p-n 结的整流行为，这是 QD 类 p 型电学行为的证据；2）平行传导剖面，似乎存在某种类似于二维电子气（2-DEG）的界面现象，这种特性可在透明高迁移率晶体管中进行探索。

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引用次数: 0

Assessment of polylactide as optical material 评估作为光学材料的聚乳酸

Q2 Engineering

Optical Materials: X

Pub Date : 2024-09-14 DOI: 10.1016/j.omx.2024.100360

Due to growing concerns considering environmental pollution, interest in bioplastics is rising. For technical applications, the respective materials have to meet high requirements. In optical applications these include transmittance, refractive index and dispersion but also dimensional stability, resistance against thermal influences and radiation induced degradation. Polylactide (PLA), a bio-based and biodegradable polymer, is already applied in high tech applications such as bioresorbable implants. The material shows favorable optical properties in its glassy state and excellent resistance against photodegradation. However, the application of PLA is hindered by its crystallization behavior. When exposed to temperatures above 55–60 °C it turns hazy. This might be avoided by hindering crystallization or tailoring crystal morphology. In this critical review, current applications of PLA are discussed and its broad use is shown. A literature search is carried out considering fully bio-based and biodegradable plastics for optical applications. The results show that currently no material is commercially available that meets all requirements set. Finally, an overview of the current state in research is provided, considering PLA-based materials with adapted crystallization behavior under the aspect of transparency. This includes use of additives, formulation of blends and material treatments. Finally, recommendations for the goal of achieving highly sustainable PLA-based optical components are given.

由于人们越来越关注环境污染问题，对生物塑料的兴趣也日益高涨。对于技术应用而言，相关材料必须满足很高的要求。在光学应用中，这些要求包括透光率、折射率和色散，以及尺寸稳定性、抗热影响和抗辐射降解性。聚乳酸（PLA）是一种生物基可生物降解聚合物，已被应用于高科技领域，如生物可吸收植入物。这种材料在玻璃态时具有良好的光学特性，并具有优异的抗光降解性能。然而，聚乳酸的结晶行为阻碍了它的应用。当暴露在 55-60 °C 以上的温度下时，聚乳酸会变得混浊。可以通过阻碍结晶或调整晶体形态来避免这种情况。本评论对聚乳酸的当前应用进行了讨论，并展示了其广泛的用途。文献搜索考虑了光学应用中的全生物基塑料和生物降解塑料。结果表明，目前市面上还没有一种材料能满足所有要求。最后，综述了目前的研究状况，考虑了在透明度方面具有适应结晶行为的聚乳酸基材料。这包括添加剂的使用、混合配方和材料处理。最后，为实现高度可持续的聚乳酸基光学元件的目标提出了建议。

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引用次数: 0

Mn2+ doped Zn2SiO4 phosphors: A threefold-mode sensing approach for optical thermometry in the visible region at 525 nm 掺杂 Mn2+ 的 Zn2SiO4 荧光粉：用于 525 纳米可见光区域光学温度测量的三重模式传感方法

Q2 Engineering

Optical Materials: X

Pub Date : 2024-09-14 DOI: 10.1016/j.omx.2024.100359

Optical functional materials such as nanostructured silicates have been studied for photonics applications involving energy conversion. In this scenario, we studied Zn₂SiO₄:Mn²⁺ nanostructured powders prepared by combustion synthesis for optical thermometry based on photon downshifting. The structural analysis showed that Zn₂SiO₄ particles were found embedded in clustered silica nanoparticles. The photoluminescence analysis showed that the samples exhibit intense green emission (centered around 525 nm), corresponding to the electronic transition ⁴T₁ → ⁶A₁ of Mn²⁺, when exposed to a low power ultraviolet lamp (centered around 255 nm). The temperature sensing performance of this material was evaluated using three different methodologies, i.e. the luminescence decay time constant, the spectral full width at half maximum, and the luminescence peak intensity from the ⁴T₁ → ⁶A₁ radiative transition. The thermometric analysis based on luminescence peak intensity provided a maximum relative sensitivity of ∼4.9x10⁻³ K⁻¹ at 498 K, while the decay lifetime and the spectral width at half maximum provided maximum relative temperature sensitivities of ∼2.9x10⁻³ K⁻¹ at 523 K and ∼1.7x10⁻³ K⁻¹ at 298 K, respectively.

纳米结构硅酸盐等光学功能材料已被研究用于涉及能量转换的光子学应用。在这种情况下，我们研究了通过燃烧合成制备的 Zn2SiO4:Mn2+ 纳米结构粉末，用于基于光子下移的光学测温。结构分析表明，Zn2SiO4 颗粒被嵌入成簇的二氧化硅纳米颗粒中。光致发光分析表明，样品在低功率紫外灯（255 nm 左右）照射下呈现出强烈的绿色发射（以 525 nm 为中心），与 Mn2+ 的电子转变 4T1 → 6A1 相对应。使用三种不同的方法评估了这种材料的温度传感性能，即发光衰减时间常数、光谱半最大全宽和 4T1 → 6A1 辐射转变的发光峰强度。基于发光峰强度的测温分析在 498 K 时的最大相对灵敏度为 ∼4.9x10-3 K-1，而衰变寿命和光谱半最大宽度在 523 K 和 298 K 时的最大相对温度灵敏度分别为 ∼2.9x10-3 K-1 和 ∼1.7x10-3 K-1。

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引用次数: 0

Upconversion luminescence of pyrochlore structured (A2B2O7) phosphors 热绿结构（A2B2O7）荧光粉的上转换发光特性

Q2 Engineering

Optical Materials: X

Pub Date : 2024-09-12 DOI: 10.1016/j.omx.2024.100355

The pyrochlore-structured (A₂B₂O₇) compounds have emerged as a focal point in contemporary research and materials science, captivating attention for their intriguing properties such as photoluminescence, superconductivity, ionic mobility, and potential applications in high-temperature barrier coatings. Their potential application in up- or down-conversion photoluminescence further positions them for integration into a myriad of optoelectronic and sensing devices. Building on extensive prior research, this review delves into the upconversion (UC) luminescence properties of numerous pyrochlore-structured host materials (titanates, zirconates, hafnates, and ytterbium pyrochlores), specifically those doped with rare earth ions. While these materials may share similar chemical and structural characteristics, their luminescent capabilities exhibit significant variation upon rare earth ion doping. The phase transitions of various pyrochlore-structured compounds with respect to cation ratio, the relationship between crystal structure, doping concentrations, and UC luminescent properties in pyrochlore-structured compounds are summarized in detail. Through controlled doping strategies and structural adjustments, researchers have been able to tailor the luminescence properties of pyrochlore structured compounds to meet specific application requirements. The intricate exploration of the UC luminescence properties of pyrochlore-structured compounds, especially when doped with rare earth ions, showcases the rich potential for these materials in a wide array of applications across various fields, from advanced sensing technologies to innovative optoelectronic devices, paving the way for exciting advancements in materials science and beyond.

热长石结构（A2B2O7）化合物已成为当代研究和材料科学领域的一个焦点，因其光致发光、超导性、离子迁移率等引人入胜的特性以及在高温阻挡涂层中的潜在应用而备受关注。它们在上转换或下转换光致发光中的潜在应用，进一步将它们整合到无数光电和传感设备中。在此前广泛研究的基础上，本综述深入探讨了许多火绿宝石结构主材料（钛酸盐、锆酸盐、铪酸盐和镱火绿宝石）的上转换（UC）发光特性，特别是那些掺杂稀土离子的材料。虽然这些材料可能具有相似的化学和结构特征，但在掺杂稀土离子后，它们的发光能力会出现显著差异。本文详细总结了各种焦绿宝石结构化合物在阳离子比例方面的相变、晶体结构与掺杂浓度之间的关系，以及焦绿宝石结构化合物的 UC 发光特性。通过可控的掺杂策略和结构调整，研究人员能够定制火绿宝石结构化合物的发光特性，以满足特定的应用要求。对火绿核结构化合物 UC 发光特性的深入探索，尤其是在掺杂稀土离子的情况下，展示了这些材料在从先进传感技术到创新光电器件等各个领域的广泛应用潜力，为材料科学及其他领域令人兴奋的进步铺平了道路。

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引用次数: 0

Investigation of the optical and electrical properties of zinc oxide by terahertz time domain ellipsometry 利用太赫兹时域椭偏仪研究氧化锌的光学和电学特性

Q2 Engineering

Optical Materials: X

Pub Date : 2024-09-12 DOI: 10.1016/j.omx.2024.100352

In order to demonstrate the application of terahertz time-domain ellipsometry (THz-TDE) in the characterization of wide-bandgap semiconductors, we studied two zinc oxide (ZnO) single crystals with different conductivities. The optical properties of ZnO samples with low conductivity and high conductivity are both obtained by ellipsometric parameters, while the electrical properties of ZnO sample with high conductivity are well deduced and fitted using the Drude model. These results suggest that THz-TDE can effectively obtain the optical and electrical properties of wide-gap semiconductors and can be used to characterize semiconductors with carrier densities higher than 10¹⁶ cm⁻³.

为了证明太赫兹时域椭偏仪（THz-TDE）在宽带隙半导体表征中的应用，我们研究了两种不同电导率的氧化锌（ZnO）单晶体。低电导率和高电导率氧化锌样品的光学特性都是通过椭偏参数得到的，而高电导率氧化锌样品的电学特性则是通过德鲁德模型推导和拟合得到的。这些结果表明，太赫兹-TDE 能有效地获得宽隙半导体的光学和电学特性，可用于表征载流子密度高于 1016 cm-3 的半导体。

引用次数: 0