OPTICS AND LASER TECHNOLOGY
·
2024
·
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
·
凝聚态物理
·
材料科学
·
纳米光子学
·
激光技术
✓ 已验证
DOI
高影响因子
Plasmonics
·
2015
·Vol. 11
·期 3
·909-915
·
IF 2.238
Wang Shuxia,Wang Hui,Liu Ting,Huang Yingzhou,Chen Guo,Wei Hua,Su Xun,Zeng Xiping,Xia Zengzilu,Wen Weijia,Sun Mengtao
In the propagating process along metal surface, surface plasmon polaritons (SPPs) mainly decay into thermal loss or release into photons, while a part of them were converted into electrons with high energy termed as hot electrons, which have great significance in photonics and electronics. In this work, the generation of plasmonic hot electrons was ascertained in the nanoparticle-film system through plasmon-driven surface catalysis (PDSC) reactions. The surface-enhanced Raman scattering (SERS) spectra of p,p'-dimercaptoazobenzene (DMAB) catalyzed by 4-nitrobenzenethiol (4NBT) experimentally demonstrated the essential catalysis electrons were generated in this hybrid plasmon mode. The results pointed out the priority of plasmonic hot electron generation in the dimer-film gap compared to the monomer-film gap which was analyzed by the surface electric and charge distribution. Furthermore, the SERS spectra of 4NBT in the metal nanoparticle-dielectric film system confirmed the necessity of hybrid plasmon mode in the generation of plasmonic hot electrons in the nanoparticle-film system. Because of the simple configuration and convenient fabrication of nanoparticle-film system, the work on this hybrid plasmon mode has a significant role in promoting the application of plasmonic hot electrons.
研究领域:
纳米光子学
·
等离激元学
·
表面科学
·
催化化学
·
分子光学
·
材料物理
·
半导体器件
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2013
·Vol. 25
·期 32
·4397-4402
·
IF 14.829
Yunlong Liu,Chunfeng Zhang,Huichao Zhang,Rui Wang,Zheng Hua,Xiaoyong Wang,Jiayu Zhang,Min Xiao
Graphical Benefiting from excitonic charge-transfer states, an efficient non-linear optical response is observed in type-II nanocrystals by four-wave mixing when the incident photon energy lies below the bandgaps of constituent semiconductors. The non-linear optical properties in nanocrystals can be manipulated by the band alignment of the core–shell components, which serves as a promising platform to design broadband non-linear optical devices.
研究领域:
纳米光子学
·
材料科学
·
凝聚态物理
·
光学工程
·
半导体物理学
✓ 已验证
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2023
·
IF 5
Shizhou Tan,Pengcheng Jian,Maocheng Shan,Yongming Zhao,Zhihua Zheng,Yiming Yang,Yuhui Zeng,Dan Xu,Zhenyu Chen,Changqing Chen,Feng Wu,Jiangnan Dai
In this work, we demonstrated tunable structured AlGaN-based nanoporous (NP) distributed Bragg reflectors (DBRs) with high-reflectivity through one-step vertical-lateral electrochemical etching (ECE). The aperture of nanopores in the doping layer and the size and density of V-pits on the surface of NP-DBRs can be tuned by controlling the etching bias. Furthermore, by further tuning the thickness of alternating layers, we achieved high reflectivity of NP-DBRs at multiple center wavelengths within the wavelength range from 280 to 800 nm. To explore its potential applications, MoS 2 with a photoluminescence (PL) emission in the red light region was grown for the first time on the NP-DBRs. Due to the light localized effect of surface V-pits and the high reflectivity of the bottom DBRs , the PL intensity of MoS 2 was significantly enhanced by a factor of 37.3 compared to the region without NP-DBRs. The PL enhancement of MoS 2 on porous AlGaN and different periodic NP-DBRs further validated the PL enhancement mechanism. The corresponding theoretical simulations also revealed that the PL enhancement should be attributed to the combined effect of enhanced light absorption and NP-DBRs induced emission interference. The fabricated AlGaN-based NP-DBRs provide a new approach for improving the quantum efficiency of two-dimensional layered materials, which holds significant importance for advancing the development of miniaturized and integrated 2D/3D heterogeneous structure systems in the field of optoelectronics.
研究领域:
光电子学
·
半导体材料
·
纳米光子学
·
二维材料
·
固体物理
·
表面科学
·
集成光子器件
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haisheng Chen,Wenwen Chen,Jiaying Shen,Xiaona Du,Tianhong Zhou,Zhengang Dong,Taiyu Bian,Jiaxing Guo,Yiyang Wen,Yuanlin Liang,Zhenping Wu,Yang Zhang
Developing smart luminescent materials with desirable and tunable characteristics has always been an overriding priority of fluorescence technology. However, huge challenges encompass the single functionality of the luminescent materials and the traditional chemical synthetic techniques with rigorously controlling over the miscellaneous experimental conditions and variables. Herein, the lanthanide-doped bismuth-layered ferroelectric (Na 0.5 Bi 0.5 ) 0.96 Er 0.04 Bi 2 Nb 2 O 9.02 has been prepared to be utilized as a platform that not only serves the in-situ and reversible tailoring of the upconverted emission via physical methods, but also enable the versatile functionalities such as photomemory and multi-modal temperature sensing. High luminescent contrast that can reach up to 83.7 % before and after the 405 nm irradiation has been realized on the basis of the photochromic phenomenon of the as-prepared (Na 0.5 Bi 0.5 ) 0.96 Er 0.04 Bi 2 Nb 2 O 9.02 sample, and the fundamental application in the photomemory has been exhibited. Moreover, the performances of triple-mode thermometry built on the fluorescent intensity ratio techniques ( 2 H 11/2 / 4 S 3/2 and 4 S 3/2 / 4 F 9/2 ) as well as the lifetime of the 4 S 3/2 excited state of the Er 3+ ion have been investigated in carefulness, with the maximal relative sensitivities of 1.22 % K −1 at 300 K, 0.92 % K −1 at 510 K, and 0.18 % K −1 at 450 K, respectively. Our results provide significant insights into the methodology of physically modulating the upconversion luminescence, and offer a glamorous pathway for multifunctional high-end applications.
研究领域:
材料科学
·
光学工程
·
功能材料
·
纳米光子学
·
传感技术
·
固态物理
·
智能材料
✓ 已验证
DOI
高影响因子
Materials Today Physics
·
2023
·
IF 11.5
Guolin Hao,Jinbiao Xiao,Yulong Hao,Guoliang Zhou,Hao Zhu,Hui Gao,Zhiqiang Xu,Zhongkun Zhao,Lili Miao,Jin Li,Hongtao Sun,Chujun Zhao
One-dimensional (1D) tellurium (Te) nanowires (NWs) have triggered intense attention due to their remarkable properties in electronics, optoelectronics and nonlinear optics . However, the saturable absorption properties of Te NWs and the ability to be bleached by strong pulsed energy need to be further improved. Van der Waals (vdW) heterostructures based on two-dimensional (2D) transition metal dichalcogenides (TMDCs) exhibit prominent nonlinear optical properties . Direct epitaxial growth of large-area 1D/2D Te-TMDC vdW heterostructures is still rarely investigated. Herein, we demonstrate the controllable epitaxial growth of large-scale 1D/2D vertical Te-TMDC heterostructures via two-step vapor phase deposition method . Our experimental results have confirmed that the saturable absorption properties of as-prepared Te-TMDC heterostructures can be obviously enhanced. The first principle calculations and surface potential measurements demonstrate that effective interlayer charge transfer between Te NWs and TMDC nanosheets is beneficial for promoting the saturable absorption properties. Systematic investigation of vdW Te-TMDC heterostructures with nonlinear optical properties is vital for the next generation of nanophotonics and integrated photonics , which paves the way for the development of saturable absorbers and light modulators based on Te-TMDC vdW heterostructures.
研究领域:
纳米光子学
·
非线性光学
·
材料科学
·
二维材料
·
异质结构工程
·
光电子学
·
凝聚态物理
✓ 已验证
DOI
高影响因子
ACS Omega
·
2018
·
IF 0
Jia Du,Yiming Lu,Jian Zhang,Jinxin Wang,Yanfang Wang,Mao Li,Qidai Chen
Tuning optical limiting was achieved based on the nanostructural and synergistic effects of heterosized gold nanoparticles and fullerene on electrochemical assembly. In particular, with thicknesses of 200, 1, and 10 nm, heterosized AuNP multilayers with periodical pairs of layers present a superior threshold of 0.59 J cm–2 to monosized AuNP films with the values of 0.89–2.55 J cm–2, which was further significantly enhanced by the introduction of C70 with a significant threshold drop from 0.43 to 0.13 J cm–2, indicating that the reverse saturable absorption of C70 had a key contribution compared to the free carrier absorption of AuNPs. This paper not only demonstrates that the hybrid engineering of heterosized AuNPs into an identical film is an effective way to enhance the optical limiting but also indicates that the reverse saturable absorption of C70 is superior to free carrier absorption of AuNPs in optical limiting in AuNPs and C70 hybrid films.
研究领域:
纳米材料
·
光子学
·
光学材料
·
纳米光子学
·
电化学
✓ 已验证
DOI
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Yongbo Zhou,Ye Tian,Arfan Bukhtiar,Zhijie Zhou,Hualin Zhao,Wenchao Lin,Xianci Zhong,Bingsuo Zou
Among a II–VI semiconductor, ZnTe is an inherent p-type semiconductor and exhibits strong emissions within the visible range, which make it suitable for various optoelectronic applications. Here, we have obtained the ZnTe- and Fe-doped ZnTe microbelt by CVD growth. Near-infrared (NIR) luminescence from 600 to 1000 nm can be seen in the PL emission spectra of ZnTe microstructure excited by CW laser, along with the appearance of multimode peaks because of the optical microcavity. The NIR luminescence in ZnTe comes from the presence of Zn vacancies due to polymorphous transition of ZnTe in the vapor solid mechanism. The PL emission under femtosecond pulsed laser excitation produces a low-threshold laser line which is near the band edge of the ZnTe microbelt, which is quite different from the continuous wave excitation PL spectrum. The time of photon–matter interaction and the fast and slow coherent recombination of exciton and defect states determine their emission distribution. As the excitation pulse changes, the different optical behaviors generated by the semiconductor may be applied in many photonic devices. We also found that in addition to the two sides of the microbelt that form the FP cavity in the pure ZnTe microbelt, the interface in the doped ZnTe microbelt can also form the FP cavity together with one side of the microbelt; the presence of interface is due to the presence of impurities.
研究领域:
光电子学
·
半导体物理
·
光子学
·
材料科学
·
纳米光子学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chenming Wu,Chenxinyu Pan,Junsheng Zheng,Yuanbiao Tong,Xin Guo,Limin Tong,Pan Wang
Gold films with a single-crystalline structure and an ultrasmooth surface are highly desired for fabricating plasmonic nanostructures with low loss. Here, we report a recrystallization-based approach to synthesize on-substrate single-crystalline gold flakes with high efficiency. By dissolving a multicrystalline gold film with tetraoctylammonium bromide at ∼140 °C and then recrystallizing at ∼160 °C for 2 h, high-density (>1000 pieces per cm2) gold flakes can be obtained directly on a substrate, which have a thin thickness concentrated around 30 nm and a maximum lateral size up to 0.12 mm. The as-synthesized gold flakes have a face-centered cubic crystalline structure and smooth surface with a surface root-mean-square roughness as low as ∼0.3 nm. To demonstrate their advantage for fabricating high-quality plasmonic nanostructures, gold nanodisk arrays that can support surface lattice resonance mode are fabricated using focused ion beam milling from a single-crystalline gold flake and a multicrystalline gold film, respectively, for comparison. Their transmission spectra show that the single-crystalline gold nanodisk array has a higher quality factor (23.3 vs 15.1) and a deeper transmission dip (41.3% vs 62.2% for the minimum transmittance) of the plasmonic resonance, which can be attributed to the reduction in electron scattering loss caused by surface roughness and grain boundaries.
研究领域:
材料科学
·
纳米光子学
·
等离激元学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yuqi Zhen,Xitao Tu,Jiajie Zhu,Yuanbiao Tong,Lufang Liu,Ni Yao,Pan Wang,Limin Tong,Lei Zhang
Fiber-tip sensors based on the Fabry–Perot interferometer (FPI) are one of the most widely used devices for temperature and pressure measurements in space-confined scenarios. However, the deposited metal films with a polycrystalline structure tend to form microcracks under strain, which can undermine the optical quality factor and thus sensing performance of these fiber-tip sensors. Here, we demonstrate an atomically smooth gold microflake (GMF)-enabled fiber-tip FPI sensor with a Q factor as high as 628. Benefiting from the high reflectivity and flexibility of GMFs and the elasticity of the PDMS spacer, the fiber-tip FPI can maintain stable sensing performance under large deformation. For temperature sensing, the fiber-tip sensor exhibits a linear response to the temperature in the range 28–40 °C with a sensitivity as high as 1.74 nm °C–1. To realize linear and sensitive pressure sensing, we design and fabricate a PDMS clamped-beam structure on the fiber tip using a soft lithography technique, achieving a sensitivity of 11.48 nm kPa–1. Moreover, simultaneous measurement of the temperature and pressure is also demonstrated using the wavelength demodulation method. The simple and cost-effective fabrication of the clamped beam and the transferable GMFs allow for the facile integration of high-quality FP cavities on fiber tips, opening new opportunities for developing optical sensors with miniaturized sizes.
研究领域:
光学传感
·
光纤光学
·
微传感器技术
·
材料科学
·
纳米光子学
✓ 已验证
DOI
高影响因子
ACS Photonics
·
2024
·
IF 6.5
Jiang Zhu,Wei Wei,Bo Chen,Ping Tang,Xiangyu Zhao,Chongzhao Wu
Surface-enhanced infrared absorption (SEIRA) sensors offer a highly sensitive platform with enhanced intensity and low noise for various molecular sensing applications. However, the sensing area in traditional metallic SEIRA sensors is limited, and fabrication of such sensors heavily relies on electron-beam lithography or photolithography, which is time-consuming and requires the procedure of metal lift-off. Here, we present an experimental demonstration of a high-performance SEIRA sensor based on liquid gallium–indium–tin (Galinstan). The SEIRA sensor incorporates the metagratings fabricated using two-photon laser writing, which enables a direct patterning of three-dimensional micro- or nanostructures. Simulation results reveal an enhancement in electric field intensity compared to the bare substrate by 2 orders of magnitude. The integration of three-dimensional structures with liquid metals is capable of achieving ultrahigh field confinement and enhancement and simultaneously expanding the effective interaction areas with analytes. Furthermore, we demonstrate the proof-of-concept sensing of molecular vibrational modes in melamine and substrate temperature, which align well with the measured signal of reflectance. The SEIRA sensor enabled by liquid Galinstan and the two-photon direct laser writing technique provides novel approaches for expanding the area of hot spots and improving capabilities of sensing in a fast, convenient, efficient, and lift-off-free manner.
研究领域:
传感器与传感技术
·
纳米光子学
·
等离激元学
·
光学材料
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2023
·Vol. 38
·期 4
·803-806
·
IF 1.6
Ma Liang,Hu Yucheng,Zhou Zeyi,Zhu Bo,Zheng Wenjie,Zhang Rui
We reported a low-cost and easy-to-make method to effectively generate quantum dot (QD) states in 2D hBN films for quantum emissions at room temperature by utilizing silica nanospheres, in comparison with the sophisticated nanofabrication method reported in previous studies. The QDs created in 2D hBN films using silica nanospheres exhibit pronounced photon emissions with a good photo-stability in air, a narrow distribution of the emission peaks within the range of 580–620 nm, and a directional emission pattern, behaving as a single electric dipole. Our work develops the method of controllable fabrication of quantum emitters in 2D materials by using nano materials and structures.
研究领域:
量子光学
·
纳米光子学
·
材料科学
·
二维材料
·
应变工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）