Advanced Photonics Research最新文献_第7页

Improvement of the Internal Quantum Efficiency of III-Nitride Blue Micro-Light-Emitting Diodes by the Hole Accelerator at the Low Current Density 低电流密度下利用空穴加速器提高 III 氮化物蓝色微型发光二极管的内部量子效率

IF 3.7

Advanced Photonics Research Pub Date : 2024-08-04 DOI: 10.1002/adpr.202300262

An-Chi Wei, Sheng-Hsiang Wang, Jyh-Rou Sze, Quoc-Hung Pham

{"title":"Improvement of the Internal Quantum Efficiency of III-Nitride Blue Micro-Light-Emitting Diodes by the Hole Accelerator at the Low Current Density","authors":"An-Chi Wei, Sheng-Hsiang Wang, Jyh-Rou Sze, Quoc-Hung Pham","doi":"10.1002/adpr.202300262","DOIUrl":"https://doi.org/10.1002/adpr.202300262","url":null,"abstract":"The hole accelerator is proven to benefit the hole injection for traditional light-emitting diodes (LEDs) because the induced electric field provides the holes with more kinetic energy to pass through the electron-blocking layer, enhancing the hole injection efficiency. Herein, the effect of the hole accelerator (HA) layer on the micro-LEDs by modeling the characteristics of the devices with a current density of lower than 10 A cm−2 is investigated. The simulation results show that the appended HA layer brings a knot of the electric field in the HA layer, leading to higher internal quantum efficiency (IQE) than the device without HA under the low current density. The thickness and composition of HA, the quantum number, and the material of quantum barrier are also simulated and analyzed. The simulated radiative, Shockley–Read–Hall, and Auger recombination rates show that the IQE of the micro-LED with the HA layer is higher than that without the HA layer under the current density of lower than 10 A cm−2.","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"5 9","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202300262","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142165572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Upconversion of Infrared Light by Graphitic Microparticles Due to Photoinduced Structural Modification 光诱导结构改性导致石墨微粒对红外光的上转换

IF 3.7

Advanced Photonics Research Pub Date : 2024-08-04 DOI: 10.1002/adpr.202470023

Rohin Sharma, Nishma Bhattarai, Rijan Maharjan, Lilia M. Woods, Nirajan Ojha, Ashim Dhakal

引用次数: 0

Enhancement of Signal-to-Background Ratio in Molecular Vibrational Signal Extraction by Stimulated Emission Depletion Mechanism

IF 3.7

Advanced Photonics Research Pub Date : 2024-08-04 DOI: 10.1002/adpr.202400078

Ge Wang, Lizhen Chen, Qiuqiang Zhan, Guangyou Fang, Yisen Wang

{"title":"Enhancement of Signal-to-Background Ratio in Molecular Vibrational Signal Extraction by Stimulated Emission Depletion Mechanism","authors":"Ge Wang, Lizhen Chen, Qiuqiang Zhan, Guangyou Fang, Yisen Wang","doi":"10.1002/adpr.202400078","DOIUrl":"https://doi.org/10.1002/adpr.202400078","url":null,"abstract":"Herein, a novel approach is presented to mitigate the fluorescence interference during the detection of vibrational signal via the stimulated emission depletion (STED). STED is the mechanism commonly employed in optical imaging; however, its application should not be confined solely to this field. To explore additional possibilities, a novel application of STED in vibrational spectroscopy detection is introduced. Vibrational spectroscopy is a widely used technique for the material detection and identification, but its sensitivity is influenced by impurity signals, especially the fluorescence. The proposed method is capable of suppressing fluorescence without influencing vibrational signal. At the low concentration of fluorescent impurities, the signal-to-background ratio of vibrational spectroscopy is 2.6 times as high as that without this method. The introduction of depletion light can enhance the detection of vibrational signals, resulting in more optimal signal detection. A promising new application of STED other than super-resolution imaging is investigated.","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"6 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202400078","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143111483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimating the Optically Pumped Threshold Fluence of Thin-Film Gain Media Using Arbitrary Excitation Beams 利用任意激发光束估计薄膜增益介质的光泵浦阈值

IF 3.7

Advanced Photonics Research Pub Date : 2024-08-04 DOI: 10.1002/adpr.202400065

Nirav Annavarapu, Iakov Goldberg, Karim Elkhouly, Sarah Hamdad, Jan Genoe, Robert Gehlhaar, Paul Heremans

{"title":"Estimating the Optically Pumped Threshold Fluence of Thin-Film Gain Media Using Arbitrary Excitation Beams","authors":"Nirav Annavarapu, Iakov Goldberg, Karim Elkhouly, Sarah Hamdad, Jan Genoe, Robert Gehlhaar, Paul Heremans","doi":"10.1002/adpr.202400065","DOIUrl":"https://doi.org/10.1002/adpr.202400065","url":null,"abstract":"Optically pumped threshold fluences are a widely reported metric to benchmark the performance of thin-film gain media and lasers. Estimating the threshold fluence for nonhomogeneous beams, such as a circular Gaussian excitation, is not trivial since the average fluence depends on the estimated spot diameter. Using an exemplary lead halide perovskite film, the inversion volume at different pump energies is mapped. It is shown that the peak fluence of an arbitrary spatial beam profile is more relevant at the threshold, as it provides an upper bound to the threshold fluence. Also, simple conversion factors to estimate the peak fluence using Gaussian excitation beams are provided and the methodology to arbitrary profiles is extrapolated. Furthermore, it is advocated for using flat-top or uniform stripe excitations to unambiguously extract the threshold fluence, since these excitations display minor discrepancies between the average and peak fluence, and keep the inversion volume relatively constant during the measurement.","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"5 12","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202400065","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Achieving Low Propagation Loss and Small-Index-Contrast Carbonized Porous Silicon Waveguides Using Direct Laser Writing

IF 3.7

Advanced Photonics Research Pub Date : 2024-08-01 DOI: 10.1002/adpr.202400055

Jesse Fletcher, John Dell, Giacinta Parish, Adrian Keating

{"title":"Achieving Low Propagation Loss and Small-Index-Contrast Carbonized Porous Silicon Waveguides Using Direct Laser Writing","authors":"Jesse Fletcher, John Dell, Giacinta Parish, Adrian Keating","doi":"10.1002/adpr.202400055","DOIUrl":"https://doi.org/10.1002/adpr.202400055","url":null,"abstract":"Porous silicon (PS) is often overlooked as a platform for creating large-mode area waveguides suitable for optical sensing applications due to challenges around creating laterally confined (in-plane) open-pore waveguide structures in the PS film. Direct laser writing (DLW) in hydrocarbon atmospheres can selectively increase the refractive index of the PS film; however, this results in large amounts of absorbing pyrolytic carbon in the pores. The efficacy of postprocessing techniques to remove unwanted absorbing carbon species created by this method is investigated through energy-dispersive X-ray and Raman analysis. The results show that oxygen plasma ashing effectively removes carbon from the pores and considerably reduces propagation losses, resulting in the lowest reported laterally confined refractive index contrast in PS waveguides. The low-index-contrast PS waveguides are shown to require adequate insulation from the high-index silicon substrate to further reduce propagation losses. The carbonized PS waveguide mode is modeled and resulting simulations show low alignment tolerance with a SMF-28 fiber mode. Herein, a method is demonstrated for creating carbonized (passivated), open-pore, and low-loss buried waveguide structures in PS films with a low alignment tolerance to SMF-28 fiber using a DLW approach in ethylene and propane atmospheres.","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"6 3","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202400055","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143530327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Fabrication of 3D-Printed Lab-On-A-Chip Devices for Fiber-Based Optical Chromatography and Sorting 设计和制造用于光纤色谱和分拣的三维打印片上实验室设备

IF 3.7

Advanced Photonics Research Pub Date : 2024-08-01 DOI: 10.1002/adpr.202400011

Ole Milark, Marc Buttkewitz, Emil Agócs, Beate Legutko, Benjamin Bergmann, Janina Bahnemann, Alexander Heisterkamp, Maria Leilani Torres-Mapa

{"title":"Design and Fabrication of 3D-Printed Lab-On-A-Chip Devices for Fiber-Based Optical Chromatography and Sorting","authors":"Ole Milark, Marc Buttkewitz, Emil Agócs, Beate Legutko, Benjamin Bergmann, Janina Bahnemann, Alexander Heisterkamp, Maria Leilani Torres-Mapa","doi":"10.1002/adpr.202400011","DOIUrl":"https://doi.org/10.1002/adpr.202400011","url":null,"abstract":"Microfluidic lab-on-a-chip (LOC) devices have become essential tools for multitudes of applications in various research fields. 3D printing of microfluidic LOC devices offers many advantages over more traditional manufacturing processes, including rapid prototyping and single-step fabrication of complex 3D structures. In this work, 3D-printed microfluidic devices are designed and fabricated for optical chromatography and sorting. Optical chromatography is performed by inserting a single-mode optical fiber into the device creating a counter-propagating laser beam to the fluid flow. Particles are separated depending on refractive index and size. To demonstrate optical sorting, a cross-type sorter 3D-printed microfluidic device is fabricated that directs the laser beam perpendicular to the flow direction. Design features such as a sloping channel and a channel configuration for 3D hydrodynamic focusing (to aid in controlled sample flow and particle position) help to optimize sorting performance. Stable optofluidic trapping and sorting are successfully achieved using the fabricated microfluidic devices. These results highlight the tremendous potential of 3D printing of microfluidic LOC devices for applications aimed at the optofluidic manipulation of micron-sized particles.","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"5 10","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202400011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142435120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advanced Optical Imaging Technologies for Microplastics Identification: Progress and Challenges 用于识别微塑料的先进光学成像技术：进展与挑战

IF 3.7

Advanced Photonics Research Pub Date : 2024-07-22 DOI: 10.1002/adpr.202400038

Yanmin Zhu, Yuxing Li, Jianqing Huang, Yunping Zhang, Yuen-Wa Ho, James Kar-Hei Fang, Edmund Y. Lam

{"title":"Advanced Optical Imaging Technologies for Microplastics Identification: Progress and Challenges","authors":"Yanmin Zhu, Yuxing Li, Jianqing Huang, Yunping Zhang, Yuen-Wa Ho, James Kar-Hei Fang, Edmund Y. Lam","doi":"10.1002/adpr.202400038","DOIUrl":"10.1002/adpr.202400038","url":null,"abstract":"Global concern about microplastic (MP) and nanoplastic (NP) particles is continuously rising with their proliferation worldwide. Effective identification methods for MP and NP pollution monitoring are highly needed, but due to different requirements and technical challenges, much of the work is still in progress. Herein, the advanced optical imaging systems that are successfully applied or have the potential for MP identification are focused on. Compared with chemical and thermal analyses, optical methods have the unique advantages of being nondestructive and noncontact and allow fast detection without complex sample preprocessing. Furthermore, they are capable of revealing the morphology, anisotropy, and material characteristics of MP for their quick and robust detection. This review aims to present a comprehensive discussion of the relevant optical imaging systems, emphasizing their operating principles, strengths, and drawbacks. Multiple comparisons and analyses among these technologies are conducted in order to provide practical guidelines for researchers. In addition, the combination of optical and other alternative technologies is described and the representative portable MP detection devices are highlighted. Together, they shed light on the prospects for long-term MP pollution monitoring and environmental protection.","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"5 11","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202400038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141815435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chiral Emission from Optical Metasurfaces and Metacavities 光学元表面和元腔的手性发射

IF 3.7

Advanced Photonics Research Pub Date : 2024-07-22 DOI: 10.1002/adpr.202400060

Jungho Han, Heejoo Jang, Yeonsoo Lim, Seongheon Kim, Jeheon Lee, Young Chul Jun

{"title":"Chiral Emission from Optical Metasurfaces and Metacavities","authors":"Jungho Han, Heejoo Jang, Yeonsoo Lim, Seongheon Kim, Jeheon Lee, Young Chul Jun","doi":"10.1002/adpr.202400060","DOIUrl":"10.1002/adpr.202400060","url":null,"abstract":"Chiral emission exhibiting a large degree of circular polarization (DCP) is important in diverse applications ranging from displays and optical storage to optical communication, bioimaging, and medical diagnostics. Although chiral luminescent materials can generate chiral emissions directly, they frequently suffer from either low DCP or low quantum efficiencies. Achieving high DCP and quantum efficiencies simultaneously remains extremely challenging. This review introduces an alternative approach to chiral emission. Chiral emission with large DCP can be readily achieved by combining conventional achiral emitters with chiral metasurfaces. Particularly, this article focuses on recent experimental and theoretical studies on perovskite metasurfaces and metacavities that employ achiral perovskite materials. First, chiral photoluminescence from extrinsic and intrinsic perovskite metasurfaces is explained together with theoretical discussions on metasurface design based on reciprocity and critical coupling. Chiral photoluminescence from other achiral materials is also explained. Subsequently, chiral electroluminescence from perovskite metacavities and other achiral materials is discussed. Finally, it is concluded with future perspectives. This review provides physical insights into how ideal chiral emission can be realized by optimizing the design of metasurfaces and metacavities. Compact chiral light sources with both near-unity DCP and strong emission intensities can have far-reaching consequences in a wide range of future applications.","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"5 12","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202400060","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141814395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural Colors Derived from the Combination of Core–Shell Particles with Cellulose 核壳粒子与纤维素结合产生的结构色彩

IF 3.7

Advanced Photonics Research Pub Date : 2024-07-22 DOI: 10.1002/adpr.202400091

Regina Leiner, Lukas Siegwardt, Catarina Ribeiro, Jonas Dörr, Christian Dietz, Robert W. Stark, Markus Gallei

{"title":"Structural Colors Derived from the Combination of Core–Shell Particles with Cellulose","authors":"Regina Leiner, Lukas Siegwardt, Catarina Ribeiro, Jonas Dörr, Christian Dietz, Robert W. Stark, Markus Gallei","doi":"10.1002/adpr.202400091","DOIUrl":"10.1002/adpr.202400091","url":null,"abstract":"\u0000Combining cellulose-based components with functional materials is highly interesting in various research fields due to the improved strength and stiffness of the materials combined with their low weight. Herein, the mechanical properties of opal films are improved by incorporating cellulose fibers and microcrystalline cellulose. This is evidenced by the increase in tensile strength of 162.8% after adding 10 wt% of microcrystalline cellulose. For this purpose, core–shell particles with a rigid, crosslinked polystyrene core and a soft shell of poly(ethyl acrylate) and poly(ethyl acrylate-co-hydroxyethyl methacrylate) are synthesized via starved-feed emulsion polymerization. The synthesized particles’ well-defined shape, morphology, and thermal properties are analyzed using transmission electron microscopy, scanning electron microscopy, and differential scanning calorimetry measurements. Free-standing mechanochromic opal films with incorporated cellulose and structural colors are obtained after processing the core–shell particles with cellulose via extrusion and the melt-shear organization technique. The homogeneous distribution of the cellulose within the composite material is investigated using fluorescent-labeled cellulose. The opal film's angle-dependent structural color is demonstrated using reflection spectroscopy.","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"5 10","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202400091","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141816616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetron Sputter Deposition of Amorphous Silicon–SiO2 Quantized Nanolaminates 磁控溅射沉积非晶硅-二氧化硅定量纳米层压板

IF 3.7

Advanced Photonics Research Pub Date : 2024-07-22 DOI: 10.1002/adpr.202400057

Silvia Schwyn Thöny, Manuel Bärtschi, Marietta Batzer, Manuel Baselgia, Raphael Gmünder, Amit Sharma, Tijmen Vermeij, Xavier Maeder, Stephan Waldner

{"title":"Magnetron Sputter Deposition of Amorphous Silicon–SiO2 Quantized Nanolaminates","authors":"Silvia Schwyn Thöny, Manuel Bärtschi, Marietta Batzer, Manuel Baselgia, Raphael Gmünder, Amit Sharma, Tijmen Vermeij, Xavier Maeder, Stephan Waldner","doi":"10.1002/adpr.202400057","DOIUrl":"10.1002/adpr.202400057","url":null,"abstract":"Quantization effects in nanolaminate structures of oxide materials are proposed and experimentally demonstrated only recently. Herein, the material combination of amorphous silicon and SiO2 deposited by magnetron sputtering is investigated and it is shown that the quantization effect can be observed indeed. Transmission electron microscopy characterization gives evidence of continuous layers of amorphous silicon and SiO2 with well-defined interfaces. The deposition process is described and the tunability of the refractive index and the bandgap energy is demonstrated. By doing so, the advantages of this novel material over classical optical materials are shown and feasibility is proved. As an example, a longpass optical interference filter with edge at 720 nm is deposited using quantized nanolaminates as the high and SiO2 as the low refractive index material. This filter can be deposited successfully with close match to the design. It shows a blocking range throughout the visible spectrum whereas a comparable filter based on SiO2–TiO2 only blocks 500–700 nm.","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"5 12","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202400057","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141814565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0