Nature Communications
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2025
·Vol. 16
·期 1
·1-10
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IF 15.7
Wang Dong,Cheng Qikuan,Xia Weibang,Tan Yongyao,Yu Kexuan,Zhang Lu,Li Guigang,Liu Rong,Wang Wei,Xu Linjuan,Wu Suli,Liu Yang,Wang Yunming,Zhou Huamin
Constructing micro-/nanostructure-modulated photofields in upconversion devices to absorb low-energy photons and emit high-energy light is revolutionary for bioimaging, lasers, and photovoltaics, with proven capability to boost upconversion luminescence (UCL) by orders of magnitude. However, photoenergy dissipation and inadequate absorption result in excitation thresholds exceeding 1 mW/cm 2 , which exceeds retinal safety limits and hinders wearable upconversion optics. Here, we report the use of upconversion core-shell microsphere-induced infrared field convergence, NaYF 4 :Yb,Er shell-based resonant cavities for multiple reflection-absorption-upconversion and photonic crystal amplifiers to improve UCL intensity three orders of magnitude, and achieve ultralow threshold (0.0025 mW/cm 2 ). The 500 nm upconversion core-shell microspheres generated 1200-fold stronger electric field through concentrated photofield and attained 8-fold infrared absorption with a forward/backward emission ratio of 150. Fabricated upconversion contact lenses significantly improved dark-light imaging clarity and vision restoration in retinal degeneration rabbits. Microsphere-mediated directional upconversion strategy maximizes photoenergy utilization, paving the way for high-performance wearable upconversion devices.
研究领域:
生物医学工程
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光学材料
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纳米技术
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DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
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2024
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IF 3.3
Yining Zhang,Bingrong Shi,Baiyu Zhang,Hao Lv,Shuaiyi Zhang,Maorong Wang,Xia Wang
This study presents a novel approach in coherent dye random laser (RL) generation by utilizing the special properties of Enteromorpha prolifera (EP) within a micro-glass tube configuration. The methodological simplicity of injecting a mixed solution of dye and EP into the tube at room temperature achieves a novel way of realizing the RL system, characterized by tunable random lasing thresholds contingent upon the concentration of EP. This tunability stems from the synergistic interplay between photon enhancement and fluorescent dye absorption facilitated by the unique nanoporous structure of EP, culminating in the attainment of a low lasing threshold of 21.7 μJ/mm 2 at an optimized EP concentration of 2 mg/mL. With an excess EP concentration, the nanoporous structure could absorb large amounts of dye, resulting in dye fluorescence reabsorption, and causing the threshold to increase. A power Fourier transition was performed to calculate the effective optical cavity of the RL system, depicting the process of the coherent RL generation. Furthermore, a comprehensive investigation into the emission stability of the RL system revealed remarkable consistency in emission intensity over a prolonged excitation duration of 20 min, underscoring the potential for integration with optoelectronic devices . The L-shape mask imaging of the RL provides high-quality images with low spatial coherence, paving a useful application for speckle-free imaging. These results offer an affordable approach to achieving high-quality and low-threshold RLs using novel biomaterials.
研究领域:
光学
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生物材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Dong Wang,Chunrui Wang,Yunfeng Zhang,Wenfei Xun,Dan Chen,Qikuan Cheng,Lu Zhang,Yang Liu,Guigang Li,Suli Wu,Huamin Zhou,Yunming Wang
Restricted by the significant non-radiative losses in the anti-Stokes process of converting low-energy photons to high-energy photons of upconversion materials, their applications necessitate high excitation thresholds in infrared imaging, lasers modulation and photodynamic therapy. Herein, we report an implantable upconversion artificial lens capable of converting infrared into visible light with an ultralow excitation power (0.015 mW cm −2 ), and integrating a self-adaptive photoprotection capability to remedy dim light seeing loss and dazzle blindness. Based on the polymeric dynamic coordination bond microenvironment regulation, the non-radiative vibrations could be suppressed to enhance upconversion luminescence via regulating the surface charge of upconversion nanoparticles in polymers by the stretching and contraction of hydrogen bonds. Furthermore, the integrated lens with indium phthalocyanine could activate a graduated photoprotection in 1 ms; this response speed is 1500 times faster than human pupil constriction and dilation. The lens-implanted rabbits achieved retinal responses under ultralow-power infrared illumination and retinal protection from strong light. The fast and clear imaging capabilities greatly shortened the blind time. This research proposes a strategy to achieve low-threshold upconversion and creates an avenue to establish the link between nonlinear optical nanomaterials and biological engineering, and provides a potential approach for bioimaging, phototherapy and wearable devices.
研究领域:
生物医学工程
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光学材料
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纳米技术
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DOI
高影响因子
ACS Nano
·
2025
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IF 16
Ruidan Zhang,Zhehong Zhou,Xueyang Li,Tao Pang,Tong Song,Haijun Wu,Qingqing Liao,Zhibin Wang,Feng Huang,Kaifeng Wu,Daqin Chen
Inorganic lead halide perovskite quantum dot (QD)-embedded glasses with exceptional optical properties and stability are promising optical gain media for laser applications, but their amplified spontaneous emission (ASE) typically occurs at high pumping thresholds. Here, we report a glass network modulation strategy for low-threshold ASE from CsPbBr3@glass. By adding ZrO2 to enhance the glass network polymerization, high-quality and compact growth of QDs inside glass is promoted rather than uncontrolled self-crystallization. Transient absorption measurements reveal that this method reduces carrier trapping, inhibits biexciton Auger recombination, and accelerates hot exciton cooling, enabling efficient population inversion. Consequently, the CsPbBr3@glass exhibits a record-low ASE threshold of 54.5 μ J cm–2 and a high net modal gain coefficient of 394.4 cm–1 under femtosecond pulse excitation, together with quasi-continuous ASE realized using nanosecond laser pumping. Notably, our CsPbBr3@glass is orders of magnitude more stable than their colloidal counterparts for ASE under identical excitation conditions. This study underscores the potential for developing high-performance lasers using glass-protected perovskite QDs.
研究领域:
光学
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材料科学
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DOI
PubMed
高影响因子
OPTICS AND LASER TECHNOLOGY
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2024
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IF 4.6
Shulei Li,Zhenxu Lin,Quantong Deng,Fu Deng,Mingcheng Panmai,Junying Chen,Yuheng Mao,Shimei Liu,Jun Dai,Yunbao Zheng,Rui Huang,Sheng Lan
Realization of long-term stable lasing from all-inorganic perovskite supercrystals is highly desirable for practical applications in optoelectronic devices. However, lasing from perovskite supercrystals excited by continuous wave laser light remains a challenge due to the photoluminescence degradation induced by thermal accumulation. Here, we report highly stable lasing with low threshold fom a CsPbClBr 2 supercrystal placed on a thin Ag film, which form a CsPbClBr 2 /Ag microcavity, by managing the thermal distribution inside the CsPbClBr 2 supercrystal. Combined numerical simulations and lifetime measurements, the localized electric field in such a hybrid microcavity leads to a spatially localized temperature distribution, which plays a crucial role in suppressing the thermal accumulation on the surface and in eliminating non-radiative recombination defects. The effective thermal management in the hybrid microcavity renders highly stable lasing with low threshold under the irradiation of continuouw wave laser light. Our findings provide a feasible and universal approach to the development of long-term stable perovskite laser.
研究领域:
光学工程
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凝聚态物理
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材料科学
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纳米光子学
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激光技术
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DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 25
·8515-8520
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IF 7.059
Qian Xiong,Jinlong Yang,Huaiyi Ding,Juan Du,Xiaosheng Tang,Tongchao Shi,Zhengzheng Liu,Daofu Wu,Hao Lin,Yuxin Leng
Recently, solution-processed conventional I–III–VI2 quantum dots (QDs) demonstrated a potential optical amplification application based on superior optical properties. Nonetheless, exploiting the potential of this type of material as a gain medium for optical amplification devices is still scarce, rendering application prospect restricted. Herein, for the first time, we report the amplified spontaneous emission (ASE) action using AgInS2 (AIS) QDs as the gain medium. ASE with an ultra-low threshold (31.58 μW cm−2) was demonstrated by combining highly reflective distributed Bragg reflectors (DBR) with AIS QDs. Furthermore, the relationship between the number of layers of the DBR mirrors and the ASE performance is systematically discussed, indicating that the seven-layer DBR is a desirable device structure with the best ASE from AIS QDs. These consequences unambiguously uncover the significant feasibility of the traditional AIS QDs as a photonic resource, simultaneously demonstrating the huge potential and promising applications of as-designed devices for optical amplification.
研究领域:
材料科学
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光子学
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纳米技术
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DOI
高影响因子
Nanoscale Advances
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2024
·Vol. 6
·期 12
·3220-3228
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IF 4.6
Xinjie Li,Linqi Chen,Danqun Mao,Jingzhou Li,Wei Xie,Hongxing Dong,Long Zhang
Due to the unique and excellent optical performance and promising prospect for various photonics applications, cavity-enhanced superfluorescence (CESF) in perovskite quantum dot assembled superstructures has garnered wide attention. However, the stringent requirements and high threshold for achieving CESF limit its further development and application. The high threshold of CESF in quantum dot superstructures is mainly attributed to the low radiation recombination rate of the quantum dot and the unsatisfactory light field limiting the ability of the assembled superstructures originating from low controllability of self-assembly. Herein, we propose a strategy to reduce the threshold of CESF in quantum dot superstructure microcavities from two aspects: facet engineering optimization of quantum dot blocks and controllability improvement of the assembly method. We introduce dodecahedral quantum dots with lower nonradiative recombination, substituting frequently used cubic quantum dots as assembly blocks. Besides, we adopt the micro-emulsion droplet assembly method to obtain spherical perovskite quantum dot superparticles with high packing factors and orderly internal arrangements, which are more controllable and efficient than the conventional solvent-drying methods. Based on the dodecahedral quantum dot superparticles, we realized low-threshold CESF (Pth = 15.6 μJ cm−2). Our work provides a practical and scalable avenue for realizing low threshold CESF in quantum dot assembled superstructure systems.
研究领域:
光学
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材料科学
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纳米技术
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DOI
PubMed
高影响因子
OPTICS EXPRESS
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2025
·Vol. 33
·期 15
·31454-31464
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IF 3.3
Danyang Cui,Wenhui Fang,Aijun Li,Aijun Li,Shenghan Wang,Zhiwei Men,Zhiwei Men
Lowering the threshold and enhancing the intensity of stimulated Raman scattering (SRS) has been a major topic in nonlinear optics. In this work, we investigated the SRS characteristic of ethanol with graphene quantum dots (GQDs) through a Nd: YAG laser with wavelengths of 532 and 355 nm, respectively. Pure ethanol solution exhibits SRS characteristic peaks at 2943 cm-1, attributed to the symmetric stretching vibration of -CH3, the maximum energy conversion efficiency was 9.51% with 532 nm laser excitation. GQDs interact with a laser in a nanostructure environment, the edge effects of GQDs enhance light–matter interaction, contributing to localized surface plasmon resonance (LSPR) under resonant excitation, resulting in an electric field enhancement on SRS, decreasing the SRS threshold. The laser wavelength of 355 nm, which falls within the absorption band of GQDs, triggers the quantum confinement effects of GQDs, leading to the emission of fluorescence and the generation of intense LSPR. The synergistic interaction between LSPR and fluorescence enhancement effect further amplifies the SRS signal and activates the strong third-order SRS, yielding a remarkable energy conversion efficiency of 29.67% with the GQDs concentration of 0.2 mg/mL. These findings demonstrate that GQDs serve as highly efficient nonlinear optical mediators, representing an excellent candidate for advancing SRS-based photonic devices.
研究领域:
非线性光学
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纳米光子学
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量子点
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拉曼光谱
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等离子体光学
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DOI
PubMed
高影响因子
Advanced Materials Technologies
·
2025
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IF 6.2
Hanhuai Yang,Tonghua Hu,Hongyu Yang,Jiaxi Li,Jingzhou Li,Haocheng Tang,Kun Qian,Zhanpeng Wang,Hongxing Dong,Long Zhang
Plasmonic lasers emerge as promising candidates for next-generation photonic devices because they confine light at subwavelength scales and enable ultra-compact optical systems. However, these devices face challenges like complex fabrication, high costs, high laser thresholds, and difficulties in large-area uniformity and optimal light-matter coupling. In this study, low-cost nanosphere lithography is used to fabricate large-area curved silver triangular arrays, which are coupled with CsPbBr 3 quantum dots to realize a low-threshold laser. By controlling the injection rate with a syringe pump, a large-area, uniform polystyrene colloid sphere monolayer and silver triangular arrays are prepared. Finite-difference time-domain simulations and time-resolved photoluminescence measurements systematically investigate the effects of microsphere size and Ag nanoparticle thickness on plasmonic resonance, photoluminescence enhancement, and emission dynamics. Optimizing Ag thickness (50–150 nm) aligns nanoarray resonance with exciton transition, enabling strong coupling and a 12.6 Purcell factor. The optimized devices exhibit a low lasing threshold of 6.3 µJ∙cm −2 , an ultrahigh Q-factor of 888 ± 20, and a lifetime of 5 ps. Additionally, a THz optical encoder with a maximum modulation bandwidth of 0.03 THz demonstrates potential for optical communication. This work underscores the importance of precise nanostructure fabrication in optimizing plasmonic laser performance.
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高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Huimin Yu,Xueqiong Su,Yong Pan,Dongwen Gao,Jin Wang,Ruixiang Chen,Junhe Zhang,Fei Dou,Xinping Zhang,Kun Ge,Xiaoyu Shi,Tianrui Zhai,Li Wang
The whispering gallery mode (WGM) microcavity has a high-quality factor and small mode volume, for the property of confining photons in a small volume for a long time, which enhances the light-matter interaction. Combining with quantum dots that act as gain medium, it can realize low-threshold and narrow-linewidth microlasers with excellent performance. However, achieving conventional whispering gallery mode lasers still requires complex preparation conditions. Here, we report a narrow linewidth whispering gallery mode lasing from all-inorganic perovskite quantum dots (CsPbBr 3 QDs), illustrating facile and cost-effective properties. CsPbBr 3 QDs with excellent properties were synthesized by hot injection method and used as gain media for lasers, and microspheres as optical resonators . The whispering gallery mode laser with a quality factor Q of 4791 and a narrow linewidth of 0.11 nm was obtained at room temperature. The WGM microlaser achieved by this paper could be a great application prospects in biotechnology.
研究领域:
光学
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光子学
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材料科学
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生物技术
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产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2022
·Vol. 31
·期 1
·301-312
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IF 3.833
Shuya Ning,Shuya Ning,Fan Duan,Naming Zhang,Kang Dai,Jiajia He,Zhihui Liu,Shuo Wang,Fanghui Zhang
All-inorganic halide perovskite CsPbX3(X = Br/Cl/I)quantum dots have gained a considerable attention in the optoelectronic fields. However, the high cost and poor stability of the prepared CsPbX3 quantum dots (QDs) are inevitable challenges for their future practical applications. And the high-performance CsPbX3 QDs are always needed. Herein, a facile and low-cost synthesis scheme was adopted to prepare the CsPbBr3 QDs modified by lead bromide (PbBr2) and tetraoctylammonium bromide (TOAB) ligands at room temperature in open air. The prepared CsPbBr3 QDs exhibited a high photoluminescence quantum yield (PLQY) of 96.6% and a low amplified spontaneous emission (ASE) threshold of 12.6 µJ/cm2. Stable ASE intensity with little degradation was also realized from the CsPbBr3 QDs doped with PMMA. Furthermore, the enhanced ASE properties of the CsPbBr3 QDs-doped PMMA based on distributed feedback (DFB) substrate was achieved with a lower threshold of 3.6 µJ/cm2, which is 28.6% of that of the (PbBr2 + TOAB)-treated CsPbBr3 QDs without PMMA. This work exhibits a promising potential in the on-chip light source.
研究领域:
光电子学
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材料科学
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光子学
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产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
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2025
·
IF 26.8
Changjiang Shi,Haihua Zhang,Haolun Li,Hongbing Fu
Blue-green lasers are essential for next-generation optoelectronics. While GaN-InGaN lasers offer excellent performance, their complex fabrication and challenges in precise bandgap tuning remain significant limitations. Hybrid lead halide perovskites present a promising alternative, with tunable bandgaps and cost-effective solution processing. However, halide migration in these materials causes spectral instability and luminescence shifts under operational conditions. Here, a novel class of Rb-Cs alloyed quasi-2D perovskites is introduced that achieve both low amplified spontaneous emission (ASE) thresholds and exceptional spectral stability. By precisely tuning the Rb-Cs ratio, it realizes ASE across the blue-green spectrum (481–532 nm). Rb-Cs alloying critically modulates the quantum well distribution, optimizes the energy landscape, and suppresses Auger recombination, resulting in a record-low ASE threshold of 1.94 µJ·cm −2 —over 50% lower than that of mixed-halide perovskites. These materials exhibit remarkable spectral robustness, with ASE spectra remaining stable even after prolonged thermal annealing, thereby overcoming halide migration-induced degradation. Furthermore, micro-ring laser arrays fabricated from these Rb-Cs alloyed perovskites demonstrate superior lasing characteristics, including high-quality whispering-gallery-mode resonances and low lasing thresholds, underscoring their potential for advanced laser technologies.
研究领域:
光电子学
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材料科学
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光子学
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半导体激光器
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钙钛矿光电器件
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激光技术
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）