Results in Optics最新文献_第5页

A simulation-based comparative study of 2T and 4T perovskite/CIGS tandem solar cell configurations 基于模拟的2T和4T钙钛矿/CIGS串联太阳能电池结构的比较研究

IF 3 Q3 Physics and Astronomy

Results in Optics

Pub Date : 2025-12-14 DOI: 10.1016/j.rio.2025.100951

Marwa Salem , Mostafa M. Salah , Ahmed Shaker , Mohamed Abouelatta , Kawther A. Al-Dhlan , Mohammad T. Alshammari , Tariq S. Almurayziq , Muhammad Tauseef Qureshi , Mohamed Mousa

The primary objective of next-generation solar cell technologies is to achieve higher power conversion efficiency (PCE) while maintaining long-term operational stability. Among the promising approaches to meet this demand, tandem solar cell architectures, particularly those combining perovskite and CIGS, have attracted significant attention owing to their complementary absorption spectra and potential for surpassing the efficiency limits of single-junction devices. This paper presents a comprehensive theoretical comparison between two-terminal (2T) and four-terminal (4T) configurations of perovskite/CIGS tandem solar cells by analyzing their performance characteristics and structural differences. The tandem designs considered in this study are based on a dual-junction layout. The front sub-cell consists of a perovskite film sandwiched between PCBM as an electron transport layer (ETL) and Cu₂O as a hole transport layer (HTL). The rear sub-cell consists of a p-type CIGS absorber, integrated with a CdS buffer layer and a ZnO window layer to complete the bottom junction. The optoelectronic properties of each sub-cell are modeled and simulated under standard test conditions to evaluate the photovoltaic (PV) metrics for both 2T and 4T configurations. By comparing the interconnection schemes and operational mechanisms of the two architectures, this work highlights the trade-offs between fabrication complexity and device performance. The results provide valuable insights for guiding the design and optimization of high-efficiency tandem solar cells tailored for commercially feasible PV applications.

下一代太阳能电池技术的主要目标是实现更高的功率转换效率（PCE），同时保持长期运行稳定性。在满足这一需求的有希望的方法中，串联太阳能电池架构，特别是钙钛矿和CIGS的组合，由于其互补的吸收光谱和超越单结器件效率限制的潜力而引起了极大的关注。本文通过分析钙钛矿/CIGS串联太阳能电池的性能特点和结构差异，对两端（2T）和四端（4T）结构进行了全面的理论比较。本研究考虑的串联设计是基于双结布局。前亚电池由钙钛矿薄膜组成，夹在作为电子传输层（ETL）的PCBM和作为空穴传输层（HTL）的Cu2O之间。后亚电池由p型CIGS吸收器组成，集成了CdS缓冲层和ZnO窗口层以完成底部结。每个子电池的光电特性在标准测试条件下建模和模拟，以评估2T和4T配置的光伏（PV）指标。通过比较两种架构的互连方案和操作机制，本工作强调了制造复杂性和器件性能之间的权衡。研究结果为指导高效串联太阳能电池的设计和优化提供了有价值的见解，为商业上可行的光伏应用量身定制。

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引用次数: 0

Fabrication and characterization of low-cost optical waveguides using recycled expanded polystyrene (EPS) as core material 以再生聚苯乙烯（EPS）为核心材料的低成本光波导的制造与表征

IF 3 Q3 Physics and Astronomy

Results in Optics

Pub Date : 2025-12-13 DOI: 10.1016/j.rio.2025.100947

Ian Yulianti , Budi Astuti , M. Alauhdin , Sevia M. Idrus , Muhammad Yusof Mohd. Noor , Nishfa Mufatihah , Mahardika Prasetya Aji , Ngurah Made Darma Putra , Savela Y. Anggaladewi , Joshu Leonardy

This study aimed to explore fabrication of optical waveguides using recycled expanded polystyrene (EPS) as the core material. The recycling process was performed by heating EPS inside the furnace for 2 h, with temperature varying from 200 °C to 280 °C. Refractive index measurement showed that EPS heated at temperature of 200 (EPS200) and 210 (EPS210) exhibited the highest refractive index. Waveguides were fabricated using polymethylmethacrylate (PMMA) sheet as a cladding layer. This sheet was engraved with CNC engraving machine to form a groove at cross-section of 1 × 1 mm² filled with EPS. Furthermore, characterizations were conducted to investigate propagation loss (PL), temperature-dependent loss (TDL), operating temperature, and time-dependent loss. The results showed that waveguides from EPS200 and EPS210 had the lowest power loss of 3.38 dB and 4.13 dB, respectively, measured at a wavelength of 660 nm. In terms of PL, the fabricated waveguide showed comparable values of 3.46 dB/cm and 3.79 dB/cm for EPS200 and EPS210, respectively. TDL was 7.87 × 10^-2 dB/^oC and 4.06 × 10^-2 dB/^oC for EPS200 and EPS210, respectively. Under cyclic temperature loading, waveguides could withstand up to 60 °C. Meanwhile, for prolonged exposure at temperature of 40 °C, there were no significant alterations in terms of power loss.

本研究旨在探索以再生膨胀聚苯乙烯（EPS）为核心材料制备光波导。回收过程是在炉内加热EPS 2h，温度在200℃~ 280℃之间变化。折射率测量表明，在200 （EPS200）和210 （EPS210）温度下加热的EPS折射率最高。采用聚甲基丙烯酸甲酯（PMMA）片作为包层制备波导。该板材采用数控雕刻机雕刻，在横截面处形成1 × 1 mm2的凹槽，填充EPS。此外，还进行了表征，以研究传播损耗（PL）、温度相关损耗（TDL）、工作温度和时间相关损耗。结果表明，EPS200和EPS210在660 nm波长处的功率损耗最低，分别为3.38 dB和4.13 dB。在PL方面，EPS200和EPS210的制备波导的等效值分别为3.46 dB/cm和3.79 dB/cm。EPS200和EPS210的TDL分别为7.87 × 10-2 dB/oC和4.06 × 10-2 dB/oC。在循环温度负载下，波导可以承受高达60°C的温度。同时，在40°C的温度下长时间暴露，在功率损失方面没有显著变化。

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引用次数: 0

Performance optimization of hybrid VLC-PLC systems using OFDM-QAM modulation for High-Speed indoor communications 高速室内通信中OFDM-QAM调制的VLC-PLC混合系统的性能优化

IF 3 Q3 Physics and Astronomy

Results in Optics

Pub Date : 2025-12-13 DOI: 10.1016/j.rio.2025.100946

Saeed Najafi Chabok, Gholamreza Baghersalimi, Hossein Goorani

This paper proposes a novel hybrid Visible Light Communication (VLC) and Power Line Communication (PLC) framework, optimized through Orthogonal Frequency Division Multiplexing with Quadrature Amplitude Modulation (OFDM-QAM), aiming to enhance spectral efficiency, reliability, and power efficiency in high-speed indoor networks. The proposed architecture exploits the complementary strengths of VLC’s high-capacity optical wireless access and PLC’s cost-efficient wired backbone, providing seamless broadband connectivity in indoor environments. A comprehensive MATLAB-based simulation framework was developed to analyze Bit Error Rate (BER), Error Vector Magnitude (EVM), and Peak-to-Average Power Ratio (PAPR) under varying modulation orders, subcarrier allocations, and channel conditions. Numerical results demonstrate that for a 128-subcarrier OFDM system with 4-QAM, the proposed design achieves a BER of 1.2 × 10^-5 at 20 dB E_b/N₀, compared to 4.7 × 10^-4 for 16-QAM under the same conditions—representing an almost 39 × improvement. Simulation results confirm that the proposed hybrid configuration achieves an EVM of 3.8 %, corresponding to a 52 % relative reduction versus the standalone PLC case with 8.0 %. Additionally, the proposed hybrid scheme yields a 22 % relative EVM improvement (from 4.1 % to 3.2 %) compared to a state-of-the-art predistortion method. A concurrent 18 % PAPR reduction over standalone OFDM is also demonstrated. In comparison to state-of-the-art VLC-RF and PLC-VLC hybrids, the proposed design achieves nearly an order-of-magnitude enhancement in reliability, while maintaining spectral efficiency. These findings establish the hybrid VLC-PLC architecture as a promising candidate for next-generation indoor broadband networks.

本文提出了一种新型的混合可见光通信（VLC）和电力线通信（PLC）框架，该框架通过正交频分复用与正交调幅（OFDM-QAM）进行优化，旨在提高高速室内网络的频谱效率、可靠性和功率效率。所提出的架构利用了VLC的高容量光学无线接入和PLC的低成本有线骨干网的互补优势，在室内环境中提供无缝宽带连接。开发了一个基于matlab的综合仿真框架，用于分析不同调制顺序、子载波分配和信道条件下的误码率（BER）、误差矢量幅度（EVM）和峰均功率比（PAPR）。数值结果表明，对于具有4-QAM的128子载波OFDM系统，所提出的设计在20 dB Eb/N0下实现了1.2 × 10-5的误码率，而在相同条件下，16-QAM的误码率为4.7 × 10-4，几乎提高了39倍。仿真结果证实，所提出的混合配置实现了3.8%的EVM，与独立PLC的8.0%相比，相对降低了52%。此外，与最先进的预失真方法相比，所提出的混合方案相对EVM提高了22%（从4.1%降至3.2%）。在独立OFDM的基础上，还演示了18%的PAPR降低。与最先进的VLC-RF和PLC-VLC混合电路相比，该设计在保持频谱效率的同时，在可靠性方面提高了近一个数量级。这些发现确立了vllc - plc混合架构作为下一代室内宽带网络的有前途的候选者。

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引用次数: 0

405 nm diode laser system for curing UV adhesives based on embedded sidelight-activated polymer optical fibers 基于嵌入式侧光激活聚合物光纤的405nm二极管激光固化UV胶粘剂系统

IF 3 Q3 Physics and Astronomy

Results in Optics

Pub Date : 2025-12-13 DOI: 10.1016/j.rio.2025.100945

Florian Rackerseder , Helen Bolek , Martin Traub , Lucas Warnecke , Sarah Klein , Friederike Brackmann , Mark Pätzel , Jan Kallweit , Robert Seewald , Alexander Schiebahn , Constantin Häfner

Within this work, an optical system was developed for coupling 405 nm laser radiation into a bundle of polymer optical fibers (POF) for a UV curing application. Traditional UV curing methods require at least one transparent joining partner, which limits their use in certain industrial applications. To enable efficient light coupling even between non-transparent materials, a novel bonding process has been developed that uses sidelight-activated POF woven into a fabric. By lateral emission from the fabric, the radiation reaches the bonding zone, so that the adhesive is cured over a large area.

The optical system aims to achieve homogeneous illumination in the bonding zone by employing a diode laser, which offers advantages over traditional LED sources, particularly in terms of absorption efficiency of UV adhesives. The system is characterized by its coupling efficiency and the feasible homogeneity of the intensity profile in the image plane. Both quantities have been determined experimentally and by simulation with Zemax OpticStudio, achieving a coupling efficiency of up to 74% and a homogeneity exceeding 95% in the focal plane.

Further investigation into the distribution of defects inside the fiber revealed that specific parameters significantly influence the homogeneity of lateral light emission. The results indicate that a tailored defect configuration can optimize the curing process, paving the way for future applications in industrial adhesive bonding. The findings underscore the potential for commercialization of this innovative optical coupling system within manufacturing sectors requiring efficient and large-area UV curing solutions.

在这项工作中，开发了一种光学系统，用于将405 nm激光辐射耦合到一束聚合物光纤（POF）中，用于紫外线固化应用。传统的UV固化方法需要至少一个透明的连接伙伴，这限制了它们在某些工业应用中的使用。为了在非透明材料之间实现有效的光耦合，研究人员开发了一种新型的粘合工艺，该工艺将侧光激活的POF编织到织物中。通过织物的侧向发射，辐射到达粘合区，从而使粘合剂大面积固化。光学系统旨在通过使用二极管激光器在键合区域实现均匀照明，这比传统的LED光源具有优势，特别是在UV粘合剂的吸收效率方面。该系统具有良好的耦合效率和像面上强度分布的均匀性。通过实验和Zemax OpticStudio的模拟，这两个量都得到了确定，实现了高达74%的耦合效率和超过95%的焦平面均匀性。对光纤内部缺陷分布的进一步研究表明，特定参数对横向光发射的均匀性有显著影响。结果表明，定制缺陷配置可以优化固化过程，为未来在工业粘合剂粘合中的应用铺平道路。研究结果强调了这种创新的光学耦合系统在需要高效和大面积UV固化解决方案的制造部门的商业化潜力。

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引用次数: 0

Angle-robust hybrid 2D-material metasurface biosensor for COVID-19 detection with machine-learning optimization 基于机器学习优化的新型冠状病毒检测角鲁棒混合二维材料超表面生物传感器

IF 3 Q3 Physics and Astronomy

Results in Optics

Pub Date : 2025-12-11 DOI: 10.1016/j.rio.2025.100944

V. Kalaipoonguzhali , Sandeep Prabhu , U. Arun Kumar , R. Dhivya

This study presents a high-sensitivity metasurface-based biosensor for COVID-19 detection, incorporating advanced two-dimensional materials which includes graphene, borophene, MoS₂, phosphorene, and germanene. The design consists of a graphene base layer supporting two phosphorene-coated rectangular resonators, a germanene-coated central circular resonator, and a MoS₂-coated concentric ring structure. COMSOL Multiphysics simulations demonstrate an exceptionally high refractive-index sensitivity of 667 GHz RIU⁻¹ within the 1.334–1.355 RIU range. Machine-learning-assisted optimization using polynomial regression enhances predictive reliability, achieving R² values between 87 % and 100 %. The proposed sensor exhibits a detection accuracy of 32.258 and a maximum figure of merit (FOM) of 21.505 RIU⁻¹, indicating strong potential for rapid and precise point-of-care COVID-19 diagnostics. Furthermore, the sensor maintains stable performance under varying incidence angles (0–80°) and tunable graphene chemical potentials (0.1–0.9 eV), confirming its robustness and practical adaptability.

本研究提出了一种用于新型冠状病毒检测的高灵敏度超表面生物传感器，该传感器采用先进的二维材料，包括石墨烯、硼苯、二硫化钼、磷烯和锗烯。该设计由一个石墨烯基层支撑两个磷烯涂层的矩形谐振器，一个锗烯涂层的中心圆形谐振器和一个二硫化钼涂层的同心圆结构组成。COMSOL多物理场模拟表明，在1.334-1.355 RIU范围内，折射率灵敏度高达667 GHz RIU−1。使用多项式回归的机器学习辅助优化提高了预测可靠性，实现了87%到100%之间的R2值。该传感器的检测精度为32.258，最大优值（FOM）为21.505 RIU−1，显示出快速、精确的COVID-19即时诊断的强大潜力。此外，该传感器在不同入射角（0-80°）和可调石墨烯化学势（0.1-0.9 eV）下保持稳定的性能，证实了其鲁棒性和实际适应性。

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引用次数: 0

StructuredLight-GNN: A graph neural network for end-to-end structured light 3D point cloud processing StructuredLight-GNN：用于端到端结构光三维点云处理的图神经网络

IF 3 Q3 Physics and Astronomy

Results in Optics

Pub Date : 2025-12-11 DOI: 10.1016/j.rio.2025.100943

Lingxi Liu, Lihe Yan, Jinhai Si, Xun Hou

To address the core challenges of complex noise, insufficient feature utilization, and poor task collaboration in structured light 3D scanning, this paper presents a graph neural network, named StructuredLight-GNN. By integrating confidence-aware mechanisms, attention mechanisms, and multi-scale feature extraction modules, the network constructs an end-to-end framework that enables collaborative processing across the entire “denoising - optimization - detection” pipeline for structured light point clouds. Key innovations include confidence-fused adaptive graph construction, multi-branch heterogeneous feature extraction, multi-task joint optimization, and hierarchical multi-scale processing. The network effectively handles complex noise patterns in structured light scans, such as phase unwrapping errors, ambient light-induced outliers, Gray code decoding failures, and blocky missing points caused by highly reflective surfaces. It also accurately identifies imaged objects even in the presence of obstacles and interference, demonstrating the significant potential of graph neural networks in structured light 3D scanning.

为了解决结构光三维扫描中存在的噪声复杂、特征利用率不足、任务协同性差等核心问题，本文提出了一种名为StructuredLight-GNN的图神经网络。通过集成信心感知机制、注意机制和多尺度特征提取模块，该网络构建了一个端到端框架，实现了对结构光点云的整个“去噪-优化-检测”管道的协同处理。关键创新包括置信度融合自适应图构建、多分支异构特征提取、多任务联合优化和分层多尺度处理。该网络有效地处理结构光扫描中的复杂噪声模式，如相位展开错误、环境光引起的异常值、格雷码解码失败以及由高反射表面引起的块缺失点。即使在存在障碍物和干扰的情况下，它也能准确识别成像物体，这表明了图神经网络在结构光3D扫描中的巨大潜力。

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引用次数: 0

Development of a high-performance 16-to-4 electro-optical encoder using photonic crystal resonant cavities 基于光子晶体谐振腔的高性能16对4电光编码器的研制

IF 3 Q3 Physics and Astronomy

Results in Optics

Pub Date : 2025-12-08 DOI: 10.1016/j.rio.2025.100941

Fatemeh Haddadan , Mohammad Soroosh , Haraprasad Mondal , Sandip Swarnakar , Ehsan Adibnia

This paper presents a novel 16-input, 4-output electro-optical encoder utilizing tunable resonant cavities. Light transmission through a silicon waveguide is modulated by a nearby photonic crystal cavity comprising 20 air holes. These air holes form a resonant cavity, filtering out unwanted wavelengths. A graphene-aluminum oxide stack within the cavity controls the filter’s properties by adjusting the graphene’s chemical potential. This configuration creates an electro-optical switch, with seven such switches directing light from input bias ports to four output ports. The device’s area and the contrast ratio are 200 µm² and 10.61 dB, respectively. The modulation depth of 96.4 % and the crosstalk of −13.52 dB are additional advantages of the designed encoder. The tunability of the transmission efficiency for the designed switches as the basis block is an interesting feature of the designed encoder. Moreover, the design is scalable, allowing for expansion to larger systems, a crucial requirement for advanced optical circuits and networks.

本文提出了一种利用可调谐谐振腔的新型16输入4输出电光编码器。通过硅波导的光传输由附近包含20个空气孔的光子晶体腔调制。这些气孔形成一个共振腔，过滤掉不需要的波长。空腔内的石墨烯-氧化铝堆叠通过调节石墨烯的化学势来控制过滤器的性能。这种配置创建了一个光电开关，七个这样的开关将光从输入偏置端口引导到四个输出端口。设备面积为200µm2，对比度为10.61 dB。该编码器的调制深度为96.4%，串扰为−13.52 dB。所设计的开关作为基块传输效率的可调性是所设计编码器的一个有趣的特点。此外，该设计是可扩展的，允许扩展到更大的系统，这是先进光学电路和网络的关键要求。

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引用次数: 0

Performance enhancement of CZTS solar cells via Cu2O HTL and Cd0.4Zn0.6S buffer layer: a numerical study Cu2O HTL和Cd0.4Zn0.6S缓冲层增强CZTS太阳能电池性能的数值研究

IF 3 Q3 Physics and Astronomy

Results in Optics

Pub Date : 2025-12-05 DOI: 10.1016/j.rio.2025.100939

Mohamed Moustafa , Ahmed A. El-Naggar , Ziad Abu Waar , Mahmoud Abdelfatah , Abdelhamid El-Shaer

Copper-zinc tin sulfide (Cu₂ZnSnS₄ or CZTS), a quaternary semiconductor with superior optoelectronic properties, has emerged as a promising absorber material for thin-film photovoltaic applications. In this study, a high-efficiency CZTS solar cell was numerically investigated using SCAPS-1D, emphasizing the roles of Cu₂O as a hole transport layer (HTL) and Cd_0.4Zn_0.6S as a tunable buffer layer. The simulated device structure—ITO/AZO/Cd_0.4Zn_0.6S /CZTS/Cu₂O/Mo—was systematically optimized by varying the thickness and bandgap of each functional layer. The best performance was achieved with a 0.01 µm-thick Cu₂O HTL (2.2 eV bandgap) and a 0.01 µm-thick Cd_0.4Zn_0.6S buffer (2.98 eV bandgap), enabling efficient hole extraction, high transparency, and suppressed interfacial recombination. Under these optimized conditions, the device exhibited an open-circuit voltage (V_oc) of 0.867 V, short-circuit current density (J_sc) of 43.424 mA/cm², Fill Factor (FF) of 82.23 %, and a remarkable power conversion efficiency (PCE) of 31.18 %. Additionally, the influence of operating temperature on solar cell performance was evaluated in the range of 280 K to 360 K. The results revealed a notable reduction in the PCE, decreasing from 32.19 % to 27.57 %. This degradation in efficiency is primarily attributed to the temperature-induced increase in reverse saturation current, which adversely impacts the V_oc and overall device performance. The interface defect studies revealed severe performance degradation, with efficiency reduced to 21.75 % at a defect density of 1 × 10²⁰ cm⁻³ at the CZTS/Cd_0.4Zn_0.6S junction. These findings underscore the critical importance of HTL/buffer layer engineering, interface defect control, and thermal management in advancing high-efficiency, thermally stable, and environmentally benign CZTS-based solar cells.

铜锌硫化锡（Cu2ZnSnS4或CZTS）是一种具有优异光电性能的季系半导体，是一种很有前途的薄膜光伏吸收材料。本研究利用SCAPS-1D对高效CZTS太阳能电池进行了数值研究，强调了Cu2O作为空穴传输层（HTL）和Cd0.4Zn0.6S作为可调缓冲层的作用。通过改变各功能层的厚度和带隙，系统地优化了ito /AZO/Cd0.4Zn0.6S /CZTS/Cu2O/ mo模拟器件结构。在0.01 μ m厚的Cu2O HTL （2.2 eV带隙）和0.01 μ m厚的Cd0.4Zn0.6S缓冲层（2.98 eV带隙）中获得了最佳性能，实现了高效的空穴提取、高透明度和抑制界面复合。在此优化条件下，器件的开路电压（Voc）为0.867 V，短路电流密度（Jsc）为43.424 mA/cm2，填充系数（FF）为82.23%，功率转换效率（PCE）为31.18%。另外，在280k ~ 360k范围内考察了工作温度对太阳能电池性能的影响。结果显示PCE明显降低，从32.19%下降到27.57%。这种效率的下降主要归因于温度引起的反向饱和电流的增加，这会对Voc和整体器件性能产生不利影响。界面缺陷研究表明，在CZTS/Cd0.4Zn0.6S结处，当缺陷密度为1 × 1020 cm−3时，效率下降到21.75%。这些发现强调了HTL/缓冲层工程、界面缺陷控制和热管理对于推进高效、热稳定和环保的czts太阳能电池的重要性。

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引用次数: 0

Low cost dry ice blaster for in situ cleaning of sensitive optics 用于敏感光学元件原位清洗的低成本干冰喷射器

IF 3 Q3 Physics and Astronomy

Results in Optics

Pub Date : 2025-12-04 DOI: 10.1016/j.rio.2025.100940

Christina Balanduk , Sangeev Selvaratnam , Avnoor Dhaliwal , Jacob A.J. Burgess

This paper presents a specialized dry ice blaster (DIB) designed for in situ cleaning of sensitive optical components. The DIB can be fabricated with fused deposition modeling (FDM) 3D printers. Results are presented for cleaning performed on highly contaminated laser cutter optics, unprotected gold off-axis parabolic (OAP) mirrors in Terahertz (THz) spectrometers, and dielectric mirrors. THz spectra indicate that DIB cleaning enabled small improvements in the peak THz electric field, while visibly cleaning the OAPs in the spectrometer. Tests with IR light showed the DIB is very effective in restoring the reflectivity of contaminated mirrors while avoiding causing permanent damage.

介绍了一种专门用于敏感光学元件原位清洗的干冰喷射器（DIB）。DIB可以用熔融沉积建模（FDM） 3D打印机制造。介绍了对高度污染的激光切割机光学器件、太赫兹（THz）光谱仪中未保护的金离轴抛物（OAP）反射镜和介电反射镜进行清洗的结果。太赫兹光谱表明，DIB清洗使太赫兹电场的峰值有了微小的改善，同时可以明显地清洗光谱仪中的oap。用红外光进行的测试表明，DIB在恢复被污染镜子的反射率方面非常有效，同时避免造成永久性损坏。

引用次数: 0

A simple description of the carrier relaxation dynamics involved in the temperature-dependent optical measurements of III-V quantum dot (QD) structures III-V量子点（QD）结构的温度相关光学测量中载流子弛豫动力学的简单描述

IF 3 Q3 Physics and Astronomy

Results in Optics

Pub Date : 2025-11-20 DOI: 10.1016/j.rio.2025.100930

Jawher Rayhani , Mehrez Oueslati

The work presented here focuses on the carrier relaxation dynamics involved in the temperature-dependent photoluminescence (PL) intensity from continuous-mode photoexcitation of QD structures. The standard motions of the photo-generated carriers were explained by a first-order development of the carrier concentration within the optically active states of the system. Under steady-state conditions, a simple rate-equation model is used to describe the temperature-dependent evolution of the quantum dot PL intensity. The fit of the experimental PL data by the proposed model was examined for several excitation power densities. The fitting results were compared with those obtained with the conventional Arrhenius formula.

本文的工作主要集中在量子点结构的连续模式光激发的温度依赖性光致发光（PL）强度中涉及的载流子松弛动力学。光生成载流子的标准运动可以用系统光活性态内载流子浓度的一阶发展来解释。在稳态条件下，用一个简单的速率方程模型来描述量子点PL强度随温度的演化。在不同的激发功率密度下，检验了该模型与实验PL数据的拟合性。将拟合结果与常规阿伦尼乌斯公式进行了比较。

引用次数: 0