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Plasmonic photocatalysis:Mechanism,applications and perspectives

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Chinese Journal of Structural Chemistry 2023年第9期42卷 57-70页

作者： Tian Wang Hong-Jia Wang Jia-Sheng Lin Jing-Liang Yang Fan-Li Zhang Xiu-Mei Lin Yue-Jiao Zhang Shangzhong Jin Jian-Feng Li Institute of optical and Electronic Technology China Jiliang UniversityHangzhou310018China State Key laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringCollege of EnergyIChEMXiamen UniversityXiamen361005China College of Physics Guizhou UniversityGuizhou550000China Department of Chemistry and Environment Science Fujian Province University Key Laboratory of Analytical ScienceMinnan Normal UniversityZhangzhou363000China Innovation laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen361005China

The process of photocatalysis,regarded as a promising approach for tackling the energy crisis and environmental pollution issues,is crucial for turning solar light into chemical resources.However,the solar-chemical conversion efficiency of typical semiconductor catalysts is still too low,so it is vital to figure out how to boost photocatalytic performance of semiconductors.Under visible light illumination,the local surface plasmon resonance(LSPR)induced by coinage metal would enhance the local electric field and improve photocatalytic performance of semiconductors,especially in the visible range.Therefore,its attachment to semiconductors has been regarded as an efficient strategy to improve photocatalytic performance.This paper reviews the latest research progress of plasmonic photocatalysis from theory to application.Starting from the excitation and relaxation of plasmons,four main mechanisms of plasmon-enhanced semiconductor photocatalysis are introduced,including enhanced light absorption and scattering,local electromagnetic field enhancement,improved hot carriers(HCs)injection and enhanced thermal effect.Secondly,the current mainstream plasmonic photocatalysts,such as monometallic,bimetallic and non-noble metal-based plasmonic catalysts,are reviewed.Finally,the applications of plasmonic photocatalysts in H_(2) production,CO_(2) reduction,and antibacterial are further summarized.

关键词： Plasmonic nanostructures Photocatalyst Electromagnetic field LSPR

Dielectric metalens for miniaturized imaging systems:progress and challenges

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Light(Science & Applications) 2022年第8期11卷 1686-1717页

作者： Meiyan Pan Yifei Fu Mengjie Zheng Hao Chen Yujia Zang Huigao Duan Qiang Li Min Qiu Yueqiang Hu Jihua laboratory Foshan528200China College of Mechanical and Vehicle Engineering Hunan UniversityChangsha410082China Greater Bay Area Institute for Innovation Hunan UniversityGuangzhou511300Guangdong ProvinceChina State Key laboratory of Modern optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou310027China Key laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake University18 Shilongshan RoadHangzhou310024China Institute of Advanced Technology Westlake Institute for Advanced Study18 Shilongshan RoadHangzhou310024China

Lightweight, miniaturized optical imaging systems are vastly anticipated in these fields of aerospace exploration, industrial vision, consumer electronics, and medical imaging. However, conventional optical techniques are intricate to downscale as refractive lenses mostly rely on phase accumulation. Metalens, composed of subwavelength nanostructures that locally control light waves, offers a disruptive path for small-scale imaging systems. Recent advances in the design and nanofabrication of dielectric metalenses have led to some high-performance practical optical systems. This review outlines the exciting developments in the aforementioned area whilst highlighting the challenges of using dielectric metalenses to replace conventional optics in miniature optical systems. After a brief introduction to the fundamental physics of dielectric metalenses, the progress and challenges in terms of the typical performances are introduced. The supplementary discussion on the common challenges hindering further development is also presented, including the limitations of the conventional design methods, difficulties in scaling up, and device integration. Furthermore, the potential approaches to address the existing challenges are also deliberated.

关键词： dielectric replace mentioned

Condensed state fluorescence switching of hexaarylbiimidazole-tetraphenylethene conjugate for super-resolution fluorescence nanolocalization

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Frontiers of Optoelectronics 2013年第4期6卷 458-467页

作者： Wen-Liang GONG Zhe HU Chong LI Guo-Feng ZHANG Tao CHEN Matthew. P. ALDRED Zhen-Li HUANG Ming-Qiang ZHU School of optical and Electronic Information Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China

This paper reported the synthesis of hexaar- ylbiimidazole-tetraphenylethene （HABI-TPE） conjugated photochromic fluorophore, which simultaneously exhib- ited photochromic property, condensed state enhanced emission and reversible fluorescence switching. Upon UV irradiation, a green species with a broad absorption band between 550 and 800 nm（ the absorption maximum at 697 nm ） was observed, which readily faded to colorless in the darkness. HABI-TPE launched strong fluorescence with the maximum emission wavelength at 520 580 nm under the excitation with 450-500 nm visible light in condensed state, which is in contrast to nonfluorescence in solution. The maximum emission wavelength in condensed state was dependent of excitation wavelength. More interest- ingly, HABI-TPE exhibited reversible fluorescence switch- ing upon alternating irradiation with blue or near-UV light （wavelength less than 490 nm） and green light （more than 490 nm） in condensed state. Our evaluation demonstrated that HABI-TPE exhibited great photoswitchable fluores- cence, which is a promising photoswitchable fluorophore for localization-based super-resolution microscopy, evi- dencing by resolving nanostructures with sub-100nm resolution in polymethylmethacrylate films.

关键词： fluorescence switching super-resolution ima-ging nanolocalization hexaarylbiimidazole （HABI） tetra-phenylethenc

Recent progress of second harmonic generation based on thin film lithium niobate [Invited]

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Chinese Optics Letters 2021年第6期19卷 54-65页

作者：黎洋黄志进丘文涛董江莉关贺元卢惠辉 Guangdong Provincial Key laboratory of optical Fiber Sensing and Communications Jinan UniversityGuangzhou 510632China Key laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes Jinan UniversityGuangzhou 510632China

Recently, nonlinear photonics has attracted considerable interest. Among the nonlinear effects, second harmonic generation(SHG) remains a hot research topic. The recent development of thin film lithium niobate(TFLN) technology has superior performances to the conventional counterparts. Herein, this review article reveals the recent progress of SHG based on TFLN and its integrated photonics. We mainly discuss and compare the different techniques of TFLN-based structures to boost the nonlinear performances assisted by localizing light in nanostructures and structured waveguides.Moreover, our conclusions and perspectives indicate that more efficient methods need to be further explored for higher SHG conversion efficiency on the TFLN platform.

关键词： thin film lithium niobate second harmonic generation waveguide nanostructure

Nonlinear optical performance of few-layer molybdenum diselenide as a slow-saturable absorber

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Photonics Research 2018年第7期6卷 674-680页

作者： GAOZHONG WANG GUANGXING LIANG AIDAN A.BAKER-MURRAY KANGPENG WANG JING JING WANG XIAOYAN ZHANG DANIEL BENNETT JING-TING LUO JUN WANG PING FAN WERNER J.BLAU Shenzhen Key laboratory of Advanced Thin Films and Applications College of Physics and Energy Shenzhen University School of Physics and the Centre for Research on Adaptive nanostructures and Nanodevices (CRANN) Trinity College Dublin Key laboratory of Materials for High-Power Laser Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences

Two-dimensional transition metal dichalcogenides are considered promising materials for next-generation photonics and nano-optical devices. Although many previous reports have shown saturable absorption of molybdenum diselenide(Mo Se2), these nonlinear optical(NLO) properties of Mo Se2 were measured in separate works and under different conditions with their hot-carrier relaxations. Here, we conducted a series of coherent studies on the NLO properties of few-layer Mo Se2 via open-aperture Z-scan and degenerate pump-probe techniques. These measurements were taken to test the materials' capabilities as a slow-saturable absorber. A slowabsorber model was employed to analyze the NLO measurements, and the results show that the NLO modulation depth was modeled to be 7.4% and 15.1% for the linear absorption coefficients of 5.22 cm-1 and 6.51 cm-1,respectively. The corresponding saturated intensities were modeled to be 39.37 MW∕cm2 and 234.75 MW∕cm2,respectively. The excitation carrier recovery time of few-layer Mo Se2 was measured by degenerate pump-probe techniques to be ～220 ps. These nonlinear optical performances make it a promising slow-saturable absorber for passive mode locking in femtosecond lasers.

关键词：金属双卤纳米技术发展现状通讯技术

Self-consistent Maxwell–Bloch model for highorder harmonic generation in nanostructured semiconductors

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Photonics Research 2022年第9期10卷 2099-2106页

作者： ANTON RUDENKO MARIA K.HAGEN JÖRG HADER STEPHAN W.KOCH JEROME V.MOLONEY Arizona Center for Mathematical Sciences and Wyant College of optical Sciences University of ArizonaTucsonArizona 85721USA Department of Physics and Material Sciences Center Philipps-Universität MarburgMarburg 35032Germany

In pursuit of efficient high-order harmonic conversion in semiconductor devices,modeling insights into the complex interplay among ultrafast microscopic electron–hole dynamics,nonlinear pulse propagation,and field confinement in nanostructured materials are urgently needed.Here,a self-consistent approach coupling semiconductor Bloch and Maxwell equations is applied to compute transmission and reflection high-order harmonic spectra for finite slab and sub-wavelength nanoparticle geometries.An increase in the generated high harmonics by several orders of magnitude is predicted for gallium arsenide nanoparticles with a size maximizing the magnetic dipole resonance.Serving as a conceptual and predictive tool for ultrafast spatiotemporal nonlinear optical responses of nanostructures with arbitrary geometry,our approach is anticipated to deliver new strategies for optimal harmonic manipulation in semiconductor metadevices.

关键词： harmonic Bloch Maxwell

High-security-level multi-dimensional optical storage medium:nanostructured glass embedded with LiGa_(5)O_(8):Mn^(2+) with photostimulated luminescence

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Light(Science & Applications) 2020年第1期9卷 1799-1808页

作者： Shisheng Lin Hang Lin Chonggeng Ma Yao Cheng Sizhe Ye Fulin Lin Renfu Li Ju Xu Yuansheng Wang Key laboratory of Optoelectronic Materials Chemistry and Physics Key Laboratory of Design and Assembly of Functional NanostructuresFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002China University of Chinese Academy of Sciences Beijing 100049China CQUPT-BRU Innovation Institute Chongqing University of Posts and TelecommunicationsChongqing 400065China Xiamen Institute of Rare-earth Materials Haixi InstitutesChinese Academy of SciencesXiamenFujian 361000China

The launch of the big data era puts forward challenges for information preservation technology,both in storage capacity and security.Herein,a brand new optical storage medium,transparent glass ceramic(TGC)embedded with photostimulated LiGa5O8:Mn2+nanocrystals,capable of achieving bit-by-bit optical data write-in and read-out in a photon trapping/detrapping mode,is developed.The highly ordered nanostructure enables light–matter interaction with high encoding/decoding resolution and low bit error rate.Importantly,going beyond traditional 2D optical storage,the high transparency of the studied bulk medium makes 3D volumetric optical data storage(ODS)possible,which brings about the merits of expanded storage capacity and improved information security.Demonstration application confirmed the erasable-rewritable 3D storage of binary data and display items in TGC with intensity/wavelength multiplexing.The present work highlights a great leap in photostimulated material for ODS application and hopefully stimulates the development of new multi-dimensional ODS media.

关键词： optical glass trapping

Enhanced circular dichroism of plasmonic system in the strong coupling regime

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Chinese Physics B 2021年第4期30卷 492-496页

作者：邹云飞于丽 School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China State Key laboratory of Information Photonics and optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China

The circular dichroism(CD) signal of a molecule is usually weak,however,a strong CD signal in optical spectrum is desirable because of its wide range of applications in biosensing,chiral photo detection,and chiral catalysis.In this work,we show that a strong chiral response can be obtained in a hybridized system consisting of an artificial chiral molecule and a nanorod in the strong coupling regime.The artificial chiral molecule is composed of six quantum dots in a helix assembly,and its CD signal arises from internal Coulomb interactions between quantum dots.The CD signal of the hybridized system is highly dependent on the Coulomb interactions and the strong coupling progress through the electromagnetic interactions.We use the coupled oscillator model to analyze strong coupling phenomenon and address that the strong coupling progress can amplify the CD signal.This work provides a scenario for designing new plasmonic nanostructures with a strong chiral optical response.

关键词： plasmonic chirality strong coupling circular dichroism

Design of high efficiency achromatic metalens with large operation bandwidth using bilayer architecture

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Opto-Electronic Advances 2021年第1期4卷 25-31页

作者： Yilin Wang Qingbin Fan Ting Xu National laboratory of Solid-State Microstructures Key Laboratory of Intelligent Optical Sensing and Integration and College of Engineering and Applied SciencesNanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

Achromatic metalens composed of arrays of subwavelength nanostructures with spatially varying geometries is attractivefor a number of optical applications. However, the limited degree of freedom in the single layer achromatic metasurfacedesign makes it difficult to simultaneously guarantee the sufficient phase dispersion and high diffraction efficiency,which restricts the achromatic bandwidth and efficiency of metalens. Here we propose and demonstrate a high efficiencyachromatic metalens with diffraction-limited focusing capability at the wavelength ranging from 1000 nm to 1700 nm. Themetalens comprises two stacked nanopillar metasurfaces, by which the required focusing phase and dispersion compensationcan be controlled independently. As a result, in addition to the large achromatic bandwidth, the averaged focusingefficiency of the bilayer metalens is higher than 64% at the near-infrared region. Our design opens up the possibilityto obtain the required phase dispersion and efficiency simultaneously, which is of great significance to design broadbandmetasurface-based optical devices.

关键词： metalens metasurface nanostructure waveguide