RARE METALS
·
2025
·
IF 11
Xu Bao-Yuan,Meng Fan-Xing,Qin Pei-Chen,Liu Hai-Di,Zhao Yu-Yan,Gao Han-Fei,Su Hui-Xue,Li Jing,Dong Hai-Yun,Wu Yu-Chen,Zhang Chun-Huan,Zhao Yong-Sheng,Zhang Jia-Tao
Metal halide perovskites have rapidly emerged as outstanding semiconductors for laser applications. Surface plasmon resonances of metals offer a platform for improving the perovskite lasing properties of metal halide perovskites by accelerating radiative recombination. However, the constraint on degrees of freedom of perovskite-metal interactions in two dimensions keeps us from getting a full picture of plasmon-involved carrier dynamics and reaching the optimum perovskite lasing performance. Here we report a strategy of synthesizing quantitative coassemblies of perovskite and metal nanocrystals for studying the effect of surface plasmons on carrier dynamics in depth and exploring plasmon-enhanced perovskite lasing performance. Within the coassembly, each metal nanocrystal supports localized surface plasmon resonances capable of accelerating radiative recombination of all adjacent perovskite nanocrystals in three dimensions. The quantitative coassemblies disclose the evolution of radiative and nonradiative recombination processes in perovskite nanocrystals with the plasmon modes, identifying an optimal metal nanocrystal content for fulfilling the highest radiative efficiency in perovskite nanocrystals. By virtue of accelerated radiative recombination, the coassemblies of perovskite and metal nanocrystals allowed for the construction of microlaser arrays with enhanced performance including low thresholds and ultrafast outputs. This work fundamentally advances the perovskite-metal systems for plasmonically enhancing perovskite optoelectronic performance. Graphical
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Huigang Du,Kaiyang Wang,Lidan Zhao,Chang Xue,Mengying Zhang,Weijia Wen,Guichuan Xing,Jinbo Wu
Single-crystalline halide perovskites with regular morphology are of great significance for laser applications because they can be used to fabricate a natural whispering-gallery-mode resonator. Although enormous efforts have been put to synthesize single-crystalline perovskites, controlling the lateral size and thickness of the crystal, particularly at the nanoscale, is still challenging. Here, we report a facile and high-throughput strategy to selectively one-step create micro/nanoscale size-controlled all-inorganic perovskite single-crystal arrays by surface-tension-confined evaporative assembly. Our method can be used to easily tune the single crystal size and selectively position the single crystal, with versatility in fabricating perovskite single-crystal arrays in a wafer scale. When the patterned size increases from 2 to 25 μm, the width of the CsPbClBr2 perovskite microplates increased from 150 nm to 4.2 μm. Fixing the width of the microplates at 1.6 μm, with the increase of the sliding speed from 50 to 250 mm/min, we could significantly control the thicknesses from 270 to 430 nm. Additionally, our present study provides a characterization of lasers based on different three-dimensional structures, confirming their width-dependent lasing mode and thickness-dependent lasing threshold characteristic, which is beneficial for the tunability of a high-performance microlaser.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Peipei Ma,Jinhai Si,Lihe Yan,Jiayi Wu,Jin Xu,Xun Hou
In semiconductor-based microlasers, the generated excited carriers can affect both the optical absorption coefficient and refractive index, influencing the lasing behavior and device performance. In this study, the lasing behavior of individual MAPbBr 3 microrods pumped by femtosecond laser pulses is investigated using an ultrafast optical Kerr gating technique. By analyzing the spectral and temporal evolution of the lasing behavior, it is found that the band-filling (BF) effect can cause a significant change in the refractive index of the material, which results in an unfavorable red-shift and broadening of the resonant modes, deteriorating the laser linewidth and quality factor. The hot carrier cooling process can provide a buffer for alteration of the energy level occupation state, resulting in a small transient refractive index change and slight red-shift. These results offer insights into the lasing behavior driven by photogenerated carrier dynamics and provide an optimization strategy for semiconductor-based microlasers.
研究领域:
光学
·
材料科学
·
半导体物理
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 14
·4888-4894
·
IF 7.393
Xiaoping Guo,Shijie Zhen,Tianchang Ouyang,Shangxiong Zhou,Qiwen Pan,Dandan Yang,Jianhao Chen,Guoping Dong,Zujin Zhao,Jianrong Qiu,Ben Zhong Tang
With the wide use of micro–nano photonic devices in on-chip optical communication, physical and chemical sensing, organic microlasers have gained increasing attention owing to their special advantages including high integration, easy preparation and excellent optical properties. However, traditional microlasers suffer from the “aggregation-caused quenching” (ACQ) effect of gain molecules and high lasing thresholds. In this contribution, we meticulously designed organic microlaser assemblies based on an “aggregation-induced emission” (AIE) fluorophore for its unique characteristics. An innovative AIE fluorophore, namely triphenylamine-benzo[1,2-b:4,5-b′]-dithiophene 1,1,5,5-tetraoxide (TPA-BDTO), with highly efficient emission at the aggregated state is employed to hybridize with the PMMA matrix, obtaining microbottles with an ultra-smooth surface via the self-assembled strategy. Benefiting from the spatially well-separated intensity based on the prolate shape of the TPA-BDTO–PMMA microbottle, we realize a single-mode microlaser in a microbottle with an appropriate pump power via precise manipulation. Moreover, the TPA-BDTO–PMMA microlaser is demonstrated as an axial tensile strain sensor with high sensitivity (0.34 pm με−1), high resolution, real-time response and simple structure, which create new opportunities for organic microlasers and even lay a foundation for the research of lab-on-chips.
研究领域:
光学
·
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 38
·2401596
·
IF 13
Yike Tan,Liuli Yang,Hao Song,Ming Huang,Jianhua Huang,Wajid Ali,Fubin Li,Ziwei Li
All inorganic lead halide perovskites exhibit fascinating optical and optoelectronic characteristics for on-chip lasing, but the lack of precise control of wafer-scale fabrication for perovskite microstructure arrays restricts their potential applications in on-chip-integrated devices. In this work, a microstructure-template assisted crystallization method is demonstrated via a designed chemical vapor deposition process, achieving the controllable fabrication of homogeneous perovskite micro-hemispheroid (PeMH) arrays spanning the entire surface area of a 4-inch wafer. Benefiting from the low-loss whispering gallery resonance and plasmon-enhanced light-matter interactions in well-confined hybrid cavities, this CsPbX 3 /Ag (X = Cl, Br) plasmonic microlasers exhibit quite low thresholds below 10 µJ cm −2 . Interestingly, these thresholds can be efficiently modulated through the manipulation of plasmonic resonance and electromagnetic field mode in PeMHs owning various diameters. This strategy not only provides a valuable methodology for the large-scale fabrication of perovskite microstructures but also endorses the potential of all-inorganic perovskite nanostructures as promising candidates for on-chip-integrated light sources.
研究领域:
材料科学
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光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2023
·Vol. 17
·期 6
·2200834
·
IF 11
Yanqiong Wang,Chaoyang Gong,Xi Yang,Tao Zhu,Ke Zhang,Yun-Jiang Rao,Lei Wei,Yuan Gong
Lasers are emerging as novel photonic tags for single-cell labeling, anticounterfeiting, and encryption technology due to their narrow linewidth, high spectral multiplexing capacity, and superior stimuli-responsiveness. These laser-encoded photonic tags mostly distinguish the heterogeneity but do not yet provide both tagging and sensing of biosamples, which is highly desirable for disease screening. Here, a photonic bandgap (PBG) fiber microlaser that works as a 2D tag and an immunosensor is developed. The tubular PBG structure allows strong light–matter interaction and supports dual-band lasing in the same optical fiber, enabling massive biosample tagging and sensitive biodetection. By encoding the random resonant peaks in the short-wave band and multiplexing in the spatial domain, a 2D laser tag is generated with a large encoding capacity (>2 8500 ). Immunosensing of microalbumin is realized by using the periodic resonant peaks in the long-wave band, and a limit of detection of 0.06 ng µL −1 is achieved. This work is inspiring for the development of high-performance, multifunctional integrated devices for disease screening.
研究领域:
生物医学工程
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光学工程
·
传感器技术
✓ 已验证
DOI
高影响因子
Advanced Science
·
2023
·
IF 15.1
Zhiyang Xu,Yinzhou Yan,Xingyuan Wang,Xiaolei Wang,Zhixiang Zhou,Xi Yang,Tianrui Zhai
Enantiomeric excess (ee) is an essential indicator of chiral drug purification in the pharmaceutical industry. However, to date the ee determination of unknown concentration enantiomers generally involves two separate techniques for chirality and concentration measurement. Here, a whispering-gallery mode (WGM) based optofluidic microlaser near exceptional point to achieve the ee determination under unknown concentration with a single technique is proposed. Exceptional point induces the unidirectional WGM lasing, providing the optofluidic microlaser with the novel capability to measure chirality by polarization, in addition to wavelength-based concentration detection. The dual-parameters detection of optofluidic microlaser empowers it to achieve ee determination of various unknown enantiomers without additional concentration measurements, a feat that is challenging to accomplish with other methods. Featuring the sensitivity enhancement and miniature structure of the WGM sensors, the obtained chiroptical response of the present approach is ≈30-fold higher than that of the conventional optical rotation-based polarimeter, and the reagent consumption is reduced by three orders of magnitude.
研究领域:
药学
·
光学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2022
·
IF 7.34
Yanting Qin,Hui Jia,Weixuan Liu,Na Lu,Huu Hao Ngo,Jie Wang
A low-cost in-situ micro laser transmission (IMLT) analysis system for particle size monitoring based on the principle of laser transmission extinction was developed to monitor the flocculation process . In this study, the IMLT system was used to obtain the voltage generated with the changes of flocculant dosage and floc sizes in different flocculation stages. A typical machine learning model, convolution neural network (CNN) method was built to manage the flocculant dosage, detection voltage and floc size to improve the accuracy of the correlation between the them. Results of IMLT revealed that the particle size of flocs was inversely proportional to the voltage, and a larger final voltage R value indicated better effects of flocculation and sedimentation. The correlation between the particle size obtained by CNN training and measured particle size was 42.4 % and 30.5 % higher than that without training at low and high concentrations, respectively. IMLT is effective in reflecting the floc sedimentation, stability and dynamic influence of the coagulant aid on flocculation system.
研究领域:
环境科学
·
水处理工程
·
机器学习应用
✓ 已验证
产品关联
DOI
高影响因子
LAB ON A CHIP
·
2016
·Vol. 16
·期 7
·1206-1213
·
IF 5.586
Lu-Jian Chen,Ling-Li Gong,Ya-Li Lin,Xin-Yi Jin,Han-Ying Li,Sen-Sen Li,Kai-Jun Che,Zhi-Ping Cai,Chaoyong James Yang
We report a magnetically transportable microlaser with cholesteric liquid crystal (CLC) core–shell structure, operating in band-edge mode. The dye doped CLC shells as a water-in-oil-in-water (W/O/W) double emulsion were fabricated by microfluidics. Water-dispersible Fe3O4 magnetic nanoparticles were incorporated in the inner aqueous phase by taking advantage of the immiscibility with the middle CLC oil phase. The influence of temperature and shell thickness on laser properties was discussed in detail. The non-invasive manipulation of microlasers was realized under a magnetic field. The dependence of velocity on the viscosity of the carrying fluid and size of the core–shell structure was theoretically analyzed and experimentally investigated using a prototype electromagnetic platform. We also discussed the design principles for this type of DDCLC core–shell structure. Such magnetically transportable microlasers offer promise in in-channel illumination applications requiring active control inside micro-channels.
研究领域:
光学
·
材料科学
·
微流体技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PhotoniX
·
2025
·Vol. 6
·期 1
·1-17
·
IF 19.1
Qian Kun,Yang Hongyu,Li Jingzhou,Liang Dong,Li Jiaxi,Zhong Yichi,Xu Zhuhua,Zhang Jiahao,Yang Hanhuai,Liang Xizhe,Zhang Junping,Dong Hongxing,Zhang Long
Fluorescent antennas have emerged as promising alternatives to conventional lens modules in optical wireless communication (OWC) systems, offering an expanded field of view (FOV) by surpassing the étendue limit. However, their limited anti-interference performance in both time and frequency domains has constrained their widespread applications. Herein, we introduce a novel “laser antenna” that integrates stimulated emission from high-quality perovskite microlasers into the optical antenna design. Achieving a theoretical bandwidth of up to 36.2 GHz and a signal-to-noise ratio (SNR) of up to 40 dB, this laser antenna demonstrates strong anti-interference capabilities in the temporal domain. Furthermore, spectral analysis using amplitude shift keying (ASK) modulation reveals its distinct periodicity, tunability, and recoverability, enabling robust frequency selectivity even in the presence of interference. These findings establish the laser antenna’s potential to overcome critical limitations of conventional OWC systems, thereby paving the way for efficient, stable, and high-performance optical wireless links.
研究领域:
光学通信
·
光子学
·
无线通信
·
激光技术
·
信号处理
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yang Mi,Anqiang Jiang,Lei Kong,Jun Wang,Heng Guo,Sheng-Nian Luo
I–III–VI ternary quantum dots (QDs) have emerged as favorable alternatives to the toxic II–VI QDs for optoelectronic and biological applications. However, their use as optical gain media for microlasers is still limited by a low fluorescence efficiency. Here, we demonstrate amplified spontaneous emission (ASE) and lasing from colloidal QDs of Zn-processed AgIn5S8 (AIS) for the first time. The passivation treatment on the AIS QDs yields a 3.4-fold enhancement of fluorescence quantum efficiency and a 30% increase in the two-photon absorption cross section. ASE is achieved from the AIS/ZnS core/shell QD films under both one- and two-photon pumping with a threshold fluence of ∼84.5 μJ/cm2 and 3.1 mJ/cm2, respectively. These thresholds are comparable to the best optical gain performance of Cd based-QDs reported in the literature. Moreover, we demonstrate a facile whispering-gallery-mode microlaser of the core/shell QDs with a lasing threshold of ∼233 μJ/cm2. The passivated AIS QDs can be promising optical gain media for photonic applications.
研究领域:
量子点
·
光电子学
·
光子学
·
材料科学
·
纳米技术
·
激光物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）