Polymers
·
2019
·Vol. 11
·期 4
·619
·
IF 3.164
Junhua Tong,Songtao Li,Chao Chen,Yulan Fu,Fengzhao Cao,Lianze Niu,Tianrui Zhai,Xinping Zhang
A random laser was achieved in a polymer membrane with silver nanoflowers on a flexible substrate. The strong confinement of the polymer waveguide and the localized field enhancement of silver nanoflowers were essential for the low-threshold random lasing action. The lasing wavelength can be tuned by bending the flexible substrate. The solution phase synthesis of the silver nanoflowers enables easy realization of this type of random lasers. The flexible and high-efficiency random lasers provide favorable factors for the development of imaging and sensing devices.Keywords:polymer waveguides;plasmonics;random laser;tunable
研究领域:
光学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 40
·12704-12708
·
IF 6.641
Shaozuo Huang,Huan Chen,Tao He,Changjian Zhang,Chengyun Zhang,Zhengkun Fu,Zhenglong Zhang,Hairong Zheng
Upconversion luminescence-based waveguides can achieve optical signal transmission and visible light emission with near-infrared light excitation and their quality is highly dependent on the coupling efficiency between the light and waveguide. Here, a new luminescent waveguide formed by a rare-earth doped microtube with beveled ends was designed to increase the optical coupling efficiency for vertical waveguide-excitation. The beveled end enabled the near-infrared light to effectively couple into the waveguide and produce a visible transmission pattern and directional emission, which was not possible using conventional luminescent waveguides without beveled ends. It was found that the beveled end can not only improve the input and the output signal efficiency, but also control the coupling efficiency and transmission pattern. In particular, a coupling efficiency of ∼68% could be obtained with the optimized beveled waveguide with a rotation angle of 30°. The high optical coupling efficiency and multi-channel luminescent waveguide enabled by the microtube with beveled ends allowed for a deeper understanding of vertical waveguide excitation, and it extends the potential applications of luminescent waveguides for bioimaging and optical communication.
研究领域:
光学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2016
·
IF 2.183
Lin Ge,Jiang Li,Haiyun Qu,Juntao Wang,Jiao Liu,Jiawei Dai,Zhiwei Zhou,Binglong Liu,Huamin Kou,Yun Shi,Zheng Wang,Yubai Pan,Qingsong Gao,Jingkun Guo
The sintering behavior and doping concentration profile of the planar waveguide YAG/Nd:YAG/YAG ceramics by the tape casting and solid-state reaction method were investigated on the basis of densification trajectory, microstructure evolution, and Nd 3+ ions diffusion . The porosity of the green body by tape casting and cold isostatic pressing is about 38.6%. And the green bodies were consolidated from 1100 °C to 1800 °C for 0.5–20 h to study the densification and the doping diffusion behaviors. At the temperature higher than 1500 °C, pure YAG phase is formed, followed by the densification and grain growth process. With the increase of temperature, two sintering stages occur, corresponding to remarkable densification and significant grain growth, respectively. The mechanism controlling densification at 1550 °C is grain boundary diffusion. The diffusion of Nd 3+ ions is more sensitive to temperature than the sintering time, and the minimum temperature required for the obvious diffusion of Nd 3+ ions is higher than 1700 °C. Finally, planar waveguide YAG/1.5 at.%Nd:YAG/YAG transparent ceramics with in-line transmittance of 84.8% at 1064 nm were obtained by vacuum-sintering at 1780 °C for 30 h. The fluorescence lifetime of 4 F 3/2 state of Nd 3+ in the specimen is about 259 μs. The prepared ceramic waveguide was tested in a laser amplifier and the laser pulse was amplificated from 87 mJ to 238 mJ, with the pump energy of 680 mJ.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2020
·Vol. 5
·期 3
·1477-1485
·
IF 6.788
Jing Wang,Shuping Xu,Aisen Li,Lei Chen,Weiqing Xu,Hongyu Zhang
A polymorph is an ideal crystal model for studying the structures affect the optical waveguide behaviors of organic cocrystals, resulting from their multiple crystal structures with the same compositions. However, the polymorphism-based optical waveguide properties of cocrystals are rarely reported. Here, two polymorphic cocrystals of 9-acetylanthracene-1,2,4,5-tetracyanobenzene in a novel sheet-like form α and a known bulk form β were prepared by the evaporation of a donor (D)/acceptor (A) solution mixed in a ratio of 1 : 1 in a mixed acetonitrile and tetrahydrofuran solution. The two polymorphs present different molecular stacking structures due to the diverse intermolecular hydrogen bond interactions, causing differences in their intermolecular charge transfer (CT) interactions and photophysical properties. Structural and spectroscopic analyses revealed stronger CT transition in the form β than in the form α. Polymorphism-based luminescence properties and morphology- and color-dependent optical waveguide behaviors were observed in the polymorphic CT cocrystals via photoluminescence (PL) micro-imaging. The propagation losses of the form α were 0.37 and 0.6 times less than those of the form β in parallel and perpendicular direction with respect to the growth direction, respectively. Three-dimensional (3D) stereoscopic mode optical waveguide behaviors can be observed in the form β. The study provides a good method for the preparation and detection of polymorphic materials. The optical waveguide properties of the cocrystals were tuned by the crystal phase, which is helpful for a deep understanding of the structure-optical functional relation in organic cocrystals. The study will open new potential applications of cocrystal materials in 3D photonic and optoelectronic devices.
研究领域:
材料科学
·
光学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
Optical Materials Express
·
2014
·Vol. 4
·期 5
·1042-1049
·
IF 2.923
Lin Ge,Jiang Li,Zhiwei Zhou,Haiyun Qu,Manjiang Dong,Yan Zhu,Tengfei Xie,Wei Li,Min Chen,Huamin Kou,Yun Shi,Yubai Pan,Xiqi Feng,Jingkun Guo
Composite YAG/Nd:YAG/YAG transparent ceramics for planar waveguide laser were fabricated by non-aqueous tape casting and solid-state reactive sintering. The slurry made from the oxide powder mixtures shows a shear thinning behavior. The morphologies of the tapes were homogeneous in structure, and the tapes had appropriate strength and toughness. After calcining at 600°C for 10h in air, the samples contained less than 0.05wt.% of carbon. No gaps were found between the layers on the fracture surface of the green body compacted by cold isostatic pressing. The composite YAG/Nd:YAG/YAG transparent ceramics with in-line transmittance of 82.5% at 1064nm were obtained by vacuum-sintering at 1760°C for 30h, whose average grain size is 36.8μm. The diffusion distance of the Nd3+ ions was about 150μm along the thickness direction of the ceramics.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2023
·
IF 1.2
Gulgina Mamtmin,Patima Nizamidin,Reyanggu Abula,Abliz Yimit
Composite optical waveguide sensors show immense potential for the trace-level detection of harmful gases owing to their high sensitivity. Herein, we prepared a highly sensitive ZnO film/K + ion-exchanged composite optical waveguide sensor by fixing a thin ZnO film layer on the surface of a K + ion-exchanged glass optical waveguide. To study the influence of the preparation method on the gas sensitivity of the sensing element, 5,10,15,20-tetrakis-(4-methoxyphenyl)porphyrin was used as a sensing layer on the surface of the ZnO film and fixed via the spin-coating and immersion methods. The gas sensitivity of the sensors prepared by the two methods was comparatively studied. The sensor elements prepared by the immersion method showed higher sensitivity than those prepared by the spin-coating method. Furthermore, the reasons for the difference in the gas sensitivity are discussed in detail. The experimental results show that the as-prepared sensor can detect ppt levels of H 2 S and SO 2 gases and has potential application in the detection of trace levels of sulfide gases in the environment and in industrial production.
研究领域:
材料科学
·
环境科学
·
光学工程
✓ 已验证
DOI
高影响因子
Microsystems & Nanoengineering
·
2024
·Vol. 10
·期 1
·1-9
·
IF 7.3
Li Fuwang,Wei Jian,Qin Xiaomei,Chen Xue,Chen Dawei,Zhang Wentao,Han Jiaguang,Yuan Libo,Deng Hongchang
Field-controlled micromanipulation represents a pivotal technique for handling microparticles, yet conventional methods often risk physical damage to targets. Here, we discovered a completely new mechanism for true noncontact manipulation through photothermal effects, called thermal-optical tweezers. We employ a laser self-assembly photothermal waveguide (PTW) for dynamic microparticle manipulation. This waveguide demonstrates superior photothermal conversion and precision control, generating a nonisothermal temperature field. The interaction of thermal convection and thermophoresis within this field creates a microfluidic potential well, enabling noncontact and nondestructive particle manipulation. By varying the path of PTWs in lithography and manipulating laser loading modes, diverse manipulation strategies, such as Z-shaped migration, periodic oscillation, and directional transport, are achievable. Our innovative noninvasive micromanipulation technology minimizes not only physical damage to target objects but also enables precise and diverse manipulation of micro entities, opening up new avenues for the photothermal control of cells and biomolecules.
研究领域:
生物物理学
·
光学工程
·
细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ORGANIC ELECTRONICS
·
2022
·
IF 3.868
Hao-Feng Lin,Xiao-Xu Yang,Song Chen,Ya-Ru Kang,Jue Wang,Zhen-Yu Jiang,Woochul Yang,Shulai Huang,Yan Xi,Xue-Dong Wang,Wan-Feng Xie
It has been demonstrated that organic semiconductor micro-/nanocrystals with multicolor emission/waveguide characterizations would be widely utilized as ideal building blocks for the next generation of miniaturized optical, electronic and logic operation devices. However, rational synthesis of one dimensional micro-/nanocrystals with multicolor emission and optical waveguide performances are highly desirable and still remain a challenge. Here, the DCM doped Alq 3 single-crystalline microrods are fabricated via a facile solution-exchange method. It is found that a redshift in light-emission frequency is extremely sensitive to the doping concentration of 4-(dicyano-methylene)-2-methyl-6-(4-dimethylamino-styryl)-4Hpyran (DCM) guest molecule. The green emission at 527 nm of Alq 3 is the main emitting peak when doping concentration of DCM in Alq 3 :DCM is less than 150:1. Then, when the doping concentration of DCM in Alq 3 :DCM is larger than 100:2 such as 100:10, the red emission at 635 nm becomes the dominant emitting peak, the redshift amounts can reach to roughly 108 nm. In addition, the DCM-doped Alq 3 microrods exhibit a lower optical loss of 0.019 dB/μm as a multicolored waveguide material. Therefore, it is demonstrated that the DCM-doped organic micro/nano crystals can be utilized as a promising building block for various optoelectronic components.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2018
·Vol. 102
·期 4
·1758-1767
·
IF 2.956
Nan Jiang,Weiping Lin,Yu Zhao,Juntao Wang,Qingsong Gao,Haiyun Qu,Lin Ge,Tengfei Xie,Qiang Liu,Yubai Pan,Jiang Li
Using the tape casting method combined with vacuum sintering and hot isostatic pressing, high-quality planar waveguide YAG/10 at.%Yb:YAG/YAG ceramics were successfully prepared. For the sample presintered at 1750°C for 30 hours and then HIPed at 1700°C for 3 hours in 200 MPa argon, the in-line transmittance reached 82.5% at 400 nm and the average grain size was ~17.1 μm. The diffusion behaviors of Yb ions across the contact boundary between the cladding YAG layer and the core Yb:YAG layer were determined by Fick's second law. Then, a 1030 nm continuous-wave (CW) Yb:YAG planar waveguide ceramic laser based on the structure of master oscillator power amplification (MOPA) was realized. After a single-pass amplification, the maximum output of the ceramic slab (60 × 10 × 1 mm 3 ) reached 1251 W and the corresponding optical-to-optical efficiency was 30.0%, which is the highest output power of a Yb:YAG planar waveguide ceramic laser to the best of our knowledge.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2015
·Vol. 4
·期 3
·533-540
·
IF 4.696
Zhenzhen Cai,Baolong Wang,Yang Zheng,Ming Li,Yao Li,Changming Chen,Daming Zhang,Zhanchen Cui,Zuosen Shi
A series of novel thermo-optic (TO) polymers (AF-Z-PC EPs) were achieved and they could be mixed with photoinitiator in solvent and to produce the negative-type fluorinated photoresists (NFPRs). TO waveguide switch arrays were fabricated based on the direct UV-written technique using the NFPRs. As the core of waveguide materials, AF-Z-PC EPs were synthesized by solution polymerization with 4,4′-(hexafluoro-isopropylidene) diphenol (6F-BPA) and bisphenol Z (BPZ) with triphosgene (BTC) and further reacted with epoxy chloropropane. The refractive index of the polymers can be adjusted by controlling the content of BPZ. Through a simple lithography process, the NFPRs can be fabricated as the waveguide easily. The propagation loss of a 4 μm wide straight waveguide was only 0.19 dB cm−1 at 1550 nm. The insertion loss of the device was directly measured to be about 9.0 dB. The rise and fall times of the device applied 200 Hz square-wave voltage were obtained as 1.546 ms and 1.226 ms, respectively. The switching power was about 15.5 mW, and the extinction ratio was 13.0 dB. The low-loss integrated switch arrays are suitable for realizing large-scale photonic integrated circuits.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of the American Chemical Society
·
2024
·
IF 14.4
Yingying Xu,Xiaojin Huang,Yulan Wang,Weiyu Qu,Weiliang Guo,Bin Su,Zhihui Dai
One-dimensional molecular crystal waveguide (MCW) can transmit self-generated electrochemiluminescence (ECL), but heavy optical loss occurs because of the small difference in the refractive index between the crystal and its surroundings. Herein, we report a micropipette electrode-supported MCW (MPE/MCW) for precisely controlling the far-field transmission of ECL in air with a low optical loss. ECL is generated from one terminal of the MCW positioned inside the MPE, which is transmitted along the MCW to the other terminal in air. In comparison with conventional waveguides on solid substrates or in solutions, the MPE/MCW is propitious to the total internal reflection of light at the MCW/air interface, thus confining the ECL efficiently in MCW and improving the waveguide performance with an extremely low-loss coefficient of 4.49 × 10–3 dB μm–1. Moreover, by regulation of the gas atmosphere, active and passive waveguides can be resolved simultaneously inside MPE and in air. This MPE/MCW offers a unique advantage of spatially controlling and separating ECL signal readout from its generation, thus holding great promise in biosensing without or with less electrical/chemical disturbance.
研究领域:
分析化学
·
生物传感
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Photonics Research
·
2021
·Vol. 10
·期 1
·50-58
·
IF 7.08
Yonghua Wang,Su He,Xiaoyan Gao,Piaopiao Ye,Lei Lei,Lei Lei,Wenchan Dong,Wenchan Dong,Wenchan Dong,Xinliang Zhang,Xinliang Zhang,Ping Xu
Silicon photonic integrated devices used for nonlinear optical signal processing play a key role in ultrafast switching, computing, and modern optical communications. However, current devices suffer from limited operation speeds and low conversion efficiencies due to the intrinsically low nonlinear index of silicon. In this paper, we experimentally demonstrate enhanced optical nonlinearity in a silicon–organic hybrid slot waveguide consisting of an ultranarrow slot waveguide coated with a highly nonlinear organic material. The fabricated slot area is as narrow as 45 nm, which is, to the best of our knowledge, the narrowest slot width that has been experimentally reported in silicon slot waveguides. The nonlinear coefficient of the proposed device with a length of 3 mm is measured to be up to 1.43×106 W−1 km−1. Based on the nanostructure design, the conversion efficiencies of degenerate four-wave mixing showed enhancements of more than 12 dB and 5 dB compared to those measured for an identical device without the organic material and a silicon strip waveguide, respectively. As a proof of concept, all-optical canonical logic units based on the prepared device with two inputs at 40 Gb/s are analyzed. The obtained logic results showed clear temporal waveforms and wide-open eye diagrams with error-free performance, illustrating that our device has great potential for use in high-speed all-optical signal processing and high-performance computing in the nodes and terminals of optical networks.
研究领域:
光学
·
材料科学
·
通信工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）