最新刊期
卷 46 ， 期 2 ， 2025
- “在非线性上转换光学领域，研究者利用微区频率-分辨干涉自相关技术，探究了ZnO微米带及F-P微腔的光学性质，为制备微腔激光器提供参考。”摘要：The nonlinear up-conversion optical properties of ZnO micro-belt and ZnO Fabry-Pérot（F-P） microcavity were studied by using frequency-resolved interferometric autocorrelation. ZnO micro-belt were prepared by chemical vapor deposition（CVD） method and dry-transferred between a pair of distributed Bragg reflectors（DBR） to form a two-dimensional strongly coupled F-P microcavity. A home-built micro-spectroscopy system was used for interferometric autocorrelation and angle-resolved spectral measurements. The experimental results showed that when pumping ZnO samples with near-infrared ultrafast lasers， both second harmonic generation（SHG） and multi-photon absorption（MPA） upconversion fluorescence signals coexisted. The distinction between SHG and MPA signals could be achieved through different characteristic lines on the frequency spectra. In the case of ZnO F-P microcavity， SHG and MPA signals occupied different emission angles. The competitive relationship between MPA exciton-polaritons and SHG in the strong coupled microcavity system was discussed. Our results provided a reference for the study of microcavity lasers through higher-order nonlinear upconversion methods.关键词：zinc oxide;frequency-resolved interference;second harmonic generation;multi-photon absorption;strong coupled microcavity43|37|0更新时间：2025-02-25
Cover Story
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Recent Developments of Light-emitting and Laser Devices Based on Zinc Oxide Micro-/Nanostructures 增强出版 AI导读
“在紫外发光及激光器件领域，氧化锌材料研究取得进展，专家探讨了其微纳结构制备及器件性能优化，为实际应用提供方向。”摘要：Due to the wide direct bandgap （3.37 eV）， large exciton binding energy （60 meV） and excellent optical gain characteristics， zinc oxide （ZnO） becomes an ideal material for low-dimensional and efficient ultraviolet light-emitting and laser devices. Recently， lasing actions have been widely observed in various ZnO microcavities under optical excitation， but the development of electrically pumped devices is the key to their practical application. This review starts with a brief overview of the basic properties of ZnO and common fabrication methods for its micro-/nanostructures， then the recent progresses of light-emitting and laser devices based on ZnO micro-/nanostructures were discussed according to different device architectures. Initially， this review focuses on the progresses of light-emitting and laser devices based on low-dimensional ZnO heterostructures and Schottky structures， alongside the methodologies for the performance optimization. Subsequently， it delves into the current landscape of research pertaining to p-type ZnO materials and their homostructural counterparts in light-emitting and laser applications. Finally， the remaining issues and future development directions of ZnO-based devices have been summarized.关键词：Zinc Oxide （ZnO）;Light-emitting devices;laser devices;heterojunction;homojunction59|97|0更新时间：2025-02-25 - “在生物传感领域，SERS技术取得显著进展，专家分析了氧化锌材料的SERS增强机制，为定量生物传感提供解决方案。”摘要：Surface-enhanced Raman scattering （SERS） technology is a highly sensitive， selective， and non-destructive spectroscopic analysis method that effectively addresses the challenge of weak Raman scattering signals. Over the past few decades， significant progress has been made in SERS biosensing technology， including the understanding of enhancement mechanisms， development of enhancement materials， preparation of high-performance substrates， and the creation of novel SERS detection technologies and equipment. However， the design and preparation of high-performance SERS substrates and the development of novel SERS detection technologies remain necessary to achieve quantitative biosensing and the identification of complex substances. Whispering gallery mode （WGM） optical microcavities can significantly enhance the interaction between the light field and matter within the cavity. The combination of WGM microcavity and SERS technology can give full play to the synergistic coupling advantages of WGM effect and SERS effect， and it is expected to realize the double enhancement of Raman scattering. In this paper， the SERS enhanced mechanism was elaborated from electromagnetic field enhancement， chemical enhancement and their synergistic enhancement. The SERS enhanced mechanism of semiconductor materials and metal-semiconductor composite system was analyzed with zinc oxide （ZnO） as the representative. The SERS synergism in optical resonator system was discussed， and the recent research progress of WGM microcavity in synergistically enhancing SERS biosensing was reviewed.关键词：surface-enhanced Raman scattering;biosensing;whispering gallery mode microcavity57|64|0更新时间：2025-02-25
- “在人工智能领域，氧化物全光控突触器件研究取得进展，为神经形态计算发展提供新方向。”摘要：Brain-like neuromorphic computing is expected to overcome the bottleneck of traditional von Neumann computing architecture， achieving low power consumption and highly efficient information processing， thereby advancing artificial intelligence technology. Artificial synapses are key hardware for building neuromorphic systems， among which photoelectric synapses combine the advantages of electronics and photonics， offering multiple functions such as optical perception， information computation and storage. Emerging all-optically controlled photoelectric synapses， which allow nonvolatile increase and decrease in conductance by optical signals， can effectively prevent damage to the device microstructure caused by electrical signals， improving working stability， and endow synaptic devices with new functions. Oxide is the most widely used artificial synaptic material because of its ease of preparation and good compatibility with CMOS technology. This paper reviews the research progress of all-optically controlled （AOC） oxide synapses with long-term plasticity. The AOC synapses are discussed in terms of conductance modulation methods， including light wavelength and light power density modulation， focusing on device structure， material selection， and photoelectric response mechanism. Finally， we analyze the current challenges faced by all-optically controlled synapses.关键词：neuromorphic computing;photoelectric synapses;all-optically controlled synapses;long-term plasticity;oxides126|100|0更新时间：2025-02-25
Invited Paper
- “据最新报道，室温磷光碳点材料因其独特优势备受关注，专家总结了其在信息加密等领域的重要进展，并展望了未来机遇。”摘要：Room-temperature phosphorescence （RTP） materials have garnered significant attention due to their prolonged luminescent lifetime， rendering them particularly suitable for non-instantaneous excitation applications. Carbon dots （CDs）， as an emerging class of RTP materials， have sparked widespread interest among researchers owing to their facile preparation， low toxicity， cost-effectiveness， excellent optical stability， and tunable optical properties. In this review， we comprehensively summarize the pivotal advancements achieved in RTP CDs materials. Initially， we delve into the luminescence mechanism of RTP， elucidating the energy level structure underlying phosphorescence emission. Subsequently， we elaborate on the synthetic strategies and modulation methods for both solid-phase and water-soluble RTP CDs. Following this， we highlight their potential applications in information encryption， sensing， lighting and display， as well as biomedicine. Lastly， we discuss the primary challenges currently faced by water-soluble RTP CDs and offer insights into future development opportunities.关键词：carbon dots;room temperature phosphorescence;Phosphorescence mechanism;synthesis method;Applications57|92|0更新时间：2025-02-25
- “在色转换显示技术领域，研究人员系统总结了红光钙钛矿发光材料的研究进展，为产业化提供借鉴。”摘要：Color conversion display technology utilizes the photoluminescent properties of light emitting materials to convert high-energy blue excitation light into red and green light through the color conversion layer， so as to obtain the full-color display effect. Metal halide perovskites have emerged as light emitting materials which exhibit outstanding optoelectronic properties of near-unity photoluminescence quantum yield， high color purity， and low manufacturing cost， making them as a key light emitting materials for ultra-high-definition displays. Currently， green perovskite light emitting materials have made progresses in their high quantum yield， full width at half maximum， and stability， and already been commercialized. However， the development of red perovskite light emitting materials still suffers scientific and technological problems that need to be resolved. In view of this， this article systematically summarizes the research progress of different types of red perovskite light emitting materials in recent years in terms of their optoelectronic properties， stability and patterning methods from the realization of different red perovskite materials， and looks forward to and discusses the key technical difficulties that need to be solved for the industrialization of red perovskite. It is hoped that this review can provide a good reference for researchers to develop and industrialize red perovskite light emitting materials for color conversion displays.关键词：color conversion displays;red perovskites;luminescence;fabrication methods84|45|0更新时间：2025-02-25
Invited Review
- “In the field of luminescent materials, a novel red-emitting phosphor K2Zn(PO3)4:Mn2+ is synthesized, which provides a new crystallographic idea and theoretical support for obtaining luminescent materials with high thermal stability. Expert xx proposed a defect-assisted model to address the inner mechanism of the phenomenon, laying a foundation for the construction of high-quality illumination systems.”摘要：Thermal quenching （TQ） at elevated temperature is a major factor affecting the luminescent intensity and efficiency of phosphors. Improving the thermal stability of phosphors and weakening the TQ effect are of significance for the high-quality illumination of phosphor-converted WLEDs. Here， a novel red-emitting phosphor K2Zn（PO3）4∶Mn2+ is synthesized by standard high temperature solid state reaction in ambient atmosphere， which is a new member of self-reduction system. An effective synthesis strategy is proposed to optimize its photoluminescent performances. Combined with X-ray photoelectron spectroscopy and X-ray absorption fine structure spectroscopy， oxygen vacancy defects introduced by Mn doping are proved to play an important role in the transition of Mn4+→Mn2+. Thermoluminescence analysis reveals that the distribution of trap levels， especially the deep ones， is effectively regulated by the controllable crystallization and significantly affect the thermal stability of phosphors. Then a defect-assisted model is proposed to address the inner mechanism of the phenomenon. The carriers trapped by deep trap levels can be released under the high-temperature stimulus， which return back to the luminescent centers and participate in the radiative recombination to improve thermal stability. This study provides a new crystallographic idea and theoretical support for obtaining luminescent materials with high thermal stability.关键词：photoluminescence;lattice defects;self-reduction;thermal stability42|35|0更新时间：2025-02-25
Editor's Choice
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Ligand and Solvent-modulated CsPbBr3/Cs4PbBr6/CsPb2Br5 Phase Transition and Its Optical Properties 增强出版 AI导读
“金属卤化物钙钛矿纳米晶在光电子领域取得新进展，通过热注射法制备三维CsPbBr3钙钛矿纳米晶，并实现不同维度间的相变，为复合结构钙钛矿制备提供简便方法。”摘要：As a promising new material， metal halide perovskite is rising as a shining star in the field of optoelectronics. In this paper， 3D CsPbBr3 perovskite nanocrystals were prepared by a conventional thermal injection method. The phase transitions between 3D CsPbBr3， 0D Cs4PbBr6， and 2D CsPb2Br5 have been realized by adding ligands or polar solvents， and their unique optical properties were investigated and compared. Under UV excitation， CsPbBr3， CsPbBr3@Cs4PbBr6， and CsPbBr3@CsPb2Br5 all emit bright green light with fluorescence lifetime on the nanosecond scale. The fluorescence lifetime of the composite structures CsPbBr3@Cs4PbBr6 and CsPbBr3@CsPb2Br5 is almost the same as that of CsPbBr3， suggesting that the emission of the CsPbBr3@Cs4PbBr6 and CsPbBr3@CsPb2Br5 complexes are all from CsPbBr3 nanocrystals. In addition， the addition of ligands enabled the transformation of CsPbBr3 to Cs4PbBr6， and the polar solvent water-induced phase transition from CsPbBr3 to CsPb2Br5 was also confirmed. This work not only provides a simple method for the preparation of composite structured perovskites， but also provides some knowledge about the degradation of lead-halide perovskites in humidity environment.关键词：perovskites;dimension;optical properties;phase transition217|33|0更新时间：2025-02-25 - “最新研究发现，掺杂稀土氧化物的Ga2O3-B2O3-ZnO-TiO2-Tb2O3玻璃在光电功能材料领域具有潜在应用价值。”摘要：Ga2O3-B2O3-ZnO-TiO2-Tb2O3 glasses doped with different rare-earth oxides （Pr6O11， Ho2O3， Dy2O3） were prepared using the high-temperature melting method. The effects of doping different rare-earth oxides on the structure， physical properties， optical properties， and magneto-optical properties of Ga2O3-B2O3-ZnO-TiO2-Tb2O3 glasses were studied. After doping with different rare-earth oxides， the density， refractive index， and Verdet constant of the glass all increase. As the wavelength of incident light and temperature increase， the absolute value of the glass’s Verdet constant gradually decreases. At a temperature of 298.15 K and an incident light wavelength of 633 nm， when the doping amounts of Tb2O3 and Ho2O3 were 40% and 1% respectively， the Verdet constant of the glass reached -156.45 rad/（T·m）， which is higher than that of the commercial Tb3Ga5O12 crystal （-134 rad/（T·m））. At a temperature of 298.15 K and an incident light wavelength of 515 nm， the Verdet constant of the glass reached -189.80 rad/（T·m）， indicating its potential application value in the field of optoelectronic functional materials.关键词：Ga2O3-B2O3-ZnO-TiO2-Tb2O3 glasses;Tb3+ doping;Verdet constant;magneto-optical properties68|21|0更新时间：2025-02-25
Synthesis and Properties of Materials
- “在近紫外有机发光二极管领域，研究者采用BCPO和TAZ材料制备单层和叠层器件，发现叠层器件性能显著优于单层器件，为提升辐射功率提供解决方案。”摘要：During the last ten years， near ultraviolet organic light-emitting diodes （NUV-OLEDs） have been widely concerned by researchers due to their NUV photon-emitting capability. However， when the electroluminescence （EL） wavelength is extended below 400 nm， how to increase the radiance of devices has become a technical challenge. In this research， small molecules of BCPO and TAZ with wide bandgap were used as the luminescent material. Then， NUV-OLEDs based on BCPO and TAZ with single unit and tandem structure were fabricated， respectively. And their EL properties were compared. The measurement results show that the EL performance of double unit tandem NUV-OLEDs is significantly better than that of single unit NUV-OLEDs. Single unit BCPO-based NUV-OLEDs showed the maximum external quantum efficiency （EQEmax） of 2.91% and the maximum radiance （Rmax） of 34.2 mW/cm2. The peak wavelength （λEL） was 384 nm and the proportion of NUV light with wavelength below 400 nm （PNUV） was 56.9% in their EL spectra. In comparison， double unit BCPO-based tandem NUV-OLEDs showed EQEmax = 5.73%， Rmax = 52.8 mW/cm2， λEL = 384 nm， and PNUV = 60.5%. Single unit TAZ-based NUV-OLEDs showed EQEmax = 3.65%， Rmax = 15.7 mW/cm2， λEL = 377 nm， and PNUV = 79.1%. In comparison， double unit TAZ-based tandem NUV-OLEDs showed EQEmax = 7.21%， Rmax = 29.4 mW/cm2， λEL = 377 nm， and PNUV = 79.6%. In addition， tandem NUV-OLEDs exhibited better luminescence stability than that of single unit devices because of the significantly lower current density required for tandem NUV-OLEDs compared to single unit NUV-OLEDs.关键词：organic light-emitting diode;near ultraviolet light;tandem structure;charge generation layer43|28|0更新时间：2025-02-25
- “最新报道，集成光子器件技术取得突破，VCSEL与超表面集成产生涡旋光束，为光电系统发展提供新思路。”摘要：The latest development of integrated photonic device technology fully meets the market demand for compact and efficient optoelectronic systems， and also effectively promotes the development of optical metasurface technology. Among them， the integration of vertical cavity surface emitting laser （VCSEL） and metasurface can generate vector beams with specific wavefronts， which greatly enhances the functionality and flexibility of optoelectronic systems. In this paper， an 850 nm VCSEL based on Si3N4 nanoantenna array metasurface is designed. By adjusting the structural parameters of the nanoantenna， more than 2
- “在光纤激光器领域，研究人员提出了基于可调有源双耦合器环级联复合腔滤波器的2微米波段单纵模铥钬共掺光纤激光器，实现了波长可调谐输出，为激光技术发展提供新方向。”摘要：A 2-μm-band single-longitudinal-mode（SLM） thulium-holmium co-doped fiber laser enabled by a tunable active dual-coupler ring based compound-cavity（ADCR-CC） filter is proposed and demonstrated. The ADCR-CC filter with adjustable filtering bandwidth（full-width at half-maximum， FWHM） and transmittance is combined with a fiber Bragg grating（FBG） to realize SLM laser output. When the pump powers of the main cavity and the compound-cavity are 1.8 W and 1.1 W， respectively， the wavelength of the measured laser output is 2 048.510 nm， the optical signal-to-noise ratio is as high as 83.08 dB， and the maximal spectral center wavelength and peak spectral power fluctuations within 90 min are 0.006 nm and 0.19 dB， respectively， with the laser output power of 50.03 mW. By adjusting the equal strength cantilever beam to change the strain acting on the FBG， the SLM laser can achieve a wavelength-tunable output in the range of 1.45 nm.关键词：active compound-cavity filter;thulium holmium co-doped fiber;single-longitudinal-mode;fiber laser134|28|0更新时间：2025-02-25
- “在半导体激光芯片散热领域，研究者提出了一种新型分布式流型结构，有效降低芯片结温与冷却流量，为高集成度和高散热量激光芯片提供技术支撑。”摘要：The integration of chip substrates with microchannels represents a cutting-edge research focus globally. Compared to traditional liquid-cooled microchannel heat sinks， this technology offers revolutionary advantages and has been successfully applied in chips like insulated gate bipolar transistor， demonstrating exceptional cooling performance. As the demand for higher output power from semiconductor laser chips in large scientific facilities and industrial applications increases， heat management has become a critical issue. Traditional research on laser bar cooling has mainly focused on optimizing liquid-cooled heat sink structures. However， their cooling capacity is constrained by thermal resistance of the heat transfer path. To address this challenge， this study proposes a novel distributed flow pattern structure based on the integration of chip substrates with microchannels， aiming for efficient cooling of semiconductor laser bars. This design significantly shortens the heat transfer path and reduces thermal resistance， effectively lowering the chip junction temperature and cooling flow rate. It provides essential technical support for achieving highly integrated and high heat dissipation laser bars. The research indicates that the proposed distributed flow pattern structure overcomes the design challenges of microchannels in semiconductor laser bar substrates. Under liquid cooling conditions of 0.35 L/min@20 ℃， it achieves the target of a chip temperature rise of ≤40 ℃， with a simulated result of a temperature rise of 30.52 ℃ at a high heat flux density of 1 000 W/cm and an optimal filling factor of 0.25.38|35|0更新时间：2025-02-25
Device Fabrication and Physics
- “报道TADF分子在OLED领域应用潜力巨大。本研究通过热振动相关函数方法结合多尺度计算，预测了三种扭曲TADF分子的光物理性质，发现其均具有快速的RISC速率，预测其TADF发光性能。研究还发现，DHPAzSi作为给体单元与不同受体结合可以改变基态和激发态之间的二面角，受体的平面性与非辐射过程影响较大的重排能正相关。此外，在薄膜中观察到分子电荷转移态能量降低和RISC速率增加。这项研究不仅为实验结果提供了可靠解释，还为未来TADF分子设计提供了宝贵指导。”摘要：Thermally activated delayed fluorescence （TADF） molecules have outstanding potential for applications in organic light-emitting diodes （OLEDs）. Due to the lack of systematic studies on the correlation between molecular structure and luminescence properties， TADF molecules are far from meeting the needs of practical applications in terms of variety and number. In this paper， three twisted TADF molecules are studied and their photophysical properties are theoretically predicted based on the thermal vibrational correlation function method combined with multiscale calculations. The results show that all the molecules exhibit fast reverse intersystem crossing （RISC） rates （kRISC）， predicting their TADF luminescence properties. In addition， the binding of DHPAzSi as the donor unit with different acceptors can change the dihedral angle between the ground and excited states， and the planarity of the acceptors is positively correlated with the reorganization energy， a property that has a strong influence on the non-radiative process. Furthermore， a decrease in the energy of the molecular charge transfer state and an increase in the kRISC were observed in the films. This study not only provides a reliable explanation for the observed experimental results， but also offers valuable insights that can guide the design of future TADF molecules.关键词：solid-state effects;thermally activated delayed fluorescence （TADF）;theoretical study;multi-scale simulation53|3|0更新时间：2025-02-25
Theoretical Calculation and Spectral Analysis
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Influence of Chip Size and Array Offset on Spatial Distribution of Light Intensity in PSS Micro-LEDs 增强出版 AI导读
“微型LED研究取得新进展，专家采用光线追迹方法，系统研究了不同尺寸PSS微型LED光强空间分布，并量化了非对称率，为显示应用优化设计提供理论支持。”摘要：Micro-light-emitting diodes （Micro-LEDs） with high brightness， high contrast， low energy consumption and fast response and other excellent characteristics， are widely used in outdoor display， augmented reality and virtual reality and other fields. However， the miniaturization of Micro-LEDs brings challenges to the control of light intensity distribution. In order to improve its luminous efficiency， patterned sapphire substrate （PSS） technology is often used to optimize the light extraction efficiency through micron-scale patterned structures. In large-size LEDs， PSS has a small effect on the spatial distribution of light intensity， but it has a significant effect in micro-level LEDs. In this paper， the ray tracing method is employed to systematically study the spatial distribution of light intensity in PSS Micro-LEDs of different sizes， with an emission wavelength of 460 nm， under various array offsets. The spatial asymmetry of the light intensity distribution is also quantified. The results show that as the size decreases， the influence of PSS on the spatial distribution of light intensity increases. When the size is 3 μm×5 μm， the asymmetry of the spatial distribution of light intensity reaches 3.06% on the y-axis and 4.22% on the x-axis， thus affecting the luminous uniformity of the Micro-LED. This study provides theoretical support for the optimal design of Micro-LEDs in display applications.关键词：micro-LED;patterned sapphire substrate（PSS）;asymmetry ratio29|42|0更新时间：2025-02-25
Luminescence Industry and Technology Frontier
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