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  1. Article ; Online: Two-dimensional phase unwrapping based on U

    Chen, Jie / Kong, Yong / Zhang, Dawei / Fu, Yinghua / Zhuang, Songlin

    Optics express

    2023  Volume 31, Issue 18, Page(s) 29792–29812

    Abstract: This paper proposes applying the nested ... ...

    Abstract This paper proposes applying the nested U
    Language English
    Publishing date 2023-09-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.500139
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Two-level optical encryption platform via an electrically driven liquid-crystal-integrated tri-channel metasurface.

    Zhang, Shijie / Wang, Qi / Gao, Xufeng / Zhang, Dawei / Zhuang, Songlin

    Optics letters

    2023  Volume 48, Issue 15, Page(s) 4125–4128

    Abstract: Metasurface-based optical encryption techniques have garnered significant attention due to their ultracompact nature and ability to support multichannel optical responses. Here, we present a liquid-crystal (LC)-integrated metasurface that enables ... ...

    Abstract Metasurface-based optical encryption techniques have garnered significant attention due to their ultracompact nature and ability to support multichannel optical responses. Here, we present a liquid-crystal (LC)-integrated metasurface that enables polarized-encrypted amplitude and phase multiplexing. This approach allows for simultaneously realizing trifold displays of both meta-holography and meta-nanoprinting. By combining propagation and geometric phase modulation, we meticulously screen the unit cells of the metasurface, establishing a comprehensive structural dictionary. As a proof-of-concept, we developed an electrically driven advanced optical encryption platform that boasts multifunctional channels and two-level encryption capabilities. This study paves the way for advanced optical encryption and identification techniques.
    Language English
    Publishing date 2023-07-31
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.498558
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Automated design of a slim catadioptric system combining freeform surface and zoom lens.

    Liu, Yunpeng / Yang, Bo / Zhuang, Songlin

    Optics express

    2022  Volume 30, Issue 8, Page(s) 13372–13390

    Abstract: The development of electronic industry demands miniaturization for zoom lens. Freeform surfaces and catadioptric lens system play important roles in the compactness of optical design. However, the initial structure of the catadioptric system is ... ...

    Abstract The development of electronic industry demands miniaturization for zoom lens. Freeform surfaces and catadioptric lens system play important roles in the compactness of optical design. However, the initial structure of the catadioptric system is relatively rare and repeated optimizing in first-order lens design requires advanced knowledge and experiences. That brings challenges for establishing an initial structure for the freeform catadioptric zoom system, which is essential for optical designers. In this work, an automatic design method for the initial structure of a catadioptric system with freeform surface and zoom lens is proposed. As long as the focal length range and total length are determined, the initial structure of the catadioptric zoom lens with arbitrary zoom ratio in a certain range can be obtained for further analysis and optimization. The rapid design method reduces the dependence on experience for catadioptric system design, saves considerable time and can help to ease the difficulty in finding the initial structure of slim zoom lens.
    Language English
    Publishing date 2022-04-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.457422
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Optimal focal length search and design of a compact zoom lens based on a telecentric intermediate image.

    Liu, Yunpeng / Yang, Bo / Zhuang, Songlin

    Applied optics

    2022  Volume 61, Issue 25, Page(s) 7366–7372

    Abstract: The design of a compact zoom lens requires a designer's most abundant and professional skills and experience, which increases the difficulty of zoom lens miniaturization. In this paper, an automatic optimal focal length search method for a catadioptric ... ...

    Abstract The design of a compact zoom lens requires a designer's most abundant and professional skills and experience, which increases the difficulty of zoom lens miniaturization. In this paper, an automatic optimal focal length search method for a catadioptric zoom lens is proposed. After 7 h of searching for the initial structure and further optimization, a 3× compact zoom lens based on a telecentric intermediate image is obtained, which is applicable for 1/4 inch (6.35 mm) CMOS, with a focal length range of -4.8∼-14
    Language English
    Publishing date 2022-10-03
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.465967
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Electrochemical Control over the Optical Properties of II-VI Colloidal Nanoplatelets by Tailoring the Station of Extra Charge Carriers

    Huang, Bo / Huang, Yihuai / Zhang, Huichao / Lu, Xinmiao / Gao, Xiumin / Zhuang, Songlin

    ACS Applied Materials & Interfaces. 2023 Apr. 18, v. 15, no. 17 p.21354-21363

    2023  

    Abstract: An electrochemical (EC) method has been successfully applied to regulate the optical properties of nanocrystals, such as reducing their gain threshold by EC doping and enhancing their photoluminescence intensity by EC filling of trap states. However, the ...

    Abstract An electrochemical (EC) method has been successfully applied to regulate the optical properties of nanocrystals, such as reducing their gain threshold by EC doping and enhancing their photoluminescence intensity by EC filling of trap states. However, the processes of EC doping and filling are rarely reported simultaneously in a single study, hindering the understanding of their underlying interactions. Here, we report the spectroelectrochemical (SEC) studies of quasi-two-dimensional nanoplatelets (NPLs), intending to clarify the above issues. EC doping is successfully achieved in CdSe/CdZnS core/shell NPLs, with red-shifted photoluminescence and a reversal of the emission intensity trend. The injection of extra electrons (holes) into the conduction (valence) band edges needs high bias voltages, while the passivation/activation process of trap states with the shift of Fermi level starts at lower EC potentials. Then, we explore the role of excitation light conditions in these processes, different from existing SEC research studies. Interestingly, increasing the laser power density can hinder EC electron injection, whereas decreasing the excitation energy evades the passivation process of trap states. Moreover, we demonstrate that EC control strategies can be used to realize color display and anti-counterfeiting applications via simultaneously tailoring the photoluminescence intensity of red- and green-emitting NPLs.
    Keywords color ; electrochemistry ; emissions factor ; energy ; nanocrystals ; photoluminescence ; nanoplatelets ; spectroelectrochemical test ; CdSe/CdZnS ; electrochemical doping ; pump condition
    Language English
    Dates of publication 2023-0418
    Size p. 21354-21363.
    Publishing place American Chemical Society
    Document type Article ; Online
    ISSN 1944-8252
    DOI 10.1021/acsami.2c21071
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: Octopus-Inspired Microgripper for Deformation-Controlled Biological Sample Manipulation.

    Qian, Cheng / Tong, Mingsi / Yu, Xinghu / Zhuang, Songlin / Gao, Huijun

    IEEE transactions on neural networks and learning systems

    2022  Volume 33, Issue 5, Page(s) 1857–1866

    Abstract: Predators in nature grip their prey in different ways, which give innovational ideas of gripping approaches in industrial applications. Octopus performs flexible gripping with the help of vacuum grippers, suction cups, which inspired a new type of ... ...

    Abstract Predators in nature grip their prey in different ways, which give innovational ideas of gripping approaches in industrial applications. Octopus performs flexible gripping with the help of vacuum grippers, suction cups, which inspired a new type of microgripper for biological sample micromanipulation. The proposed gripper consists of a glass pipette and a pump driven by a step-motor. The step-motor is controlled with adaptive robust control to adjust the gripping pressure applied on the biological sample. A dynamic model is developed for the biological sample aiming for better deformation control performance. A visual detection algorithm is developed for data processing to identify the parameters in the dynamic model and the detection result of visual algorithm is also used as feedback of adaptive robust control, which diminishes the negative influence of parameter and model uncertainties. Zebrafish larva was used as the testing sample for experiment and the corresponding parameters were identified experimentally. The experimental results correlated well with the model predicted deformation curve and visual detection algorithm provided promising accuracy, which is less than [Formula: see text]. Adaptive robust control provides fast and accuracy response in point-to-point deformation testing, and the average responding time is less than 30 s and the average error is no larger than 1 pixel.
    MeSH term(s) Animals ; Equipment Design ; Neural Networks, Computer ; Octopodiformes ; Zebrafish
    Language English
    Publishing date 2022-05-02
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2162-2388
    ISSN (online) 2162-2388
    DOI 10.1109/TNNLS.2021.3070631
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Dense Convolutional Neural Network for Identification of Raman Spectra.

    Zhou, Wei / Qian, Ziheng / Ni, Xinyuan / Tang, Yujun / Guo, Hanming / Zhuang, Songlin

    Sensors (Basel, Switzerland)

    2023  Volume 23, Issue 17

    Abstract: The rapid development of cloud computing and deep learning makes the intelligent modes of applications widespread in various fields. The identification of Raman spectra can be realized in the cloud, due to its powerful computing, abundant spectral ... ...

    Abstract The rapid development of cloud computing and deep learning makes the intelligent modes of applications widespread in various fields. The identification of Raman spectra can be realized in the cloud, due to its powerful computing, abundant spectral databases and advanced algorithms. Thus, it can reduce the dependence on the performance of the terminal instruments. However, the complexity of the detection environment can cause great interferences, which might significantly decrease the identification accuracies of algorithms. In this paper, a deep learning algorithm based on the Dense network has been proposed to satisfy the realization of this vision. The proposed Dense convolutional neural network has a very deep structure of over 40 layers and plenty of parameters to adjust the weight of different wavebands. In the kernel Dense blocks part of the network, it has a feed-forward fashion of connection for each layer to every other layer. It can alleviate the gradient vanishing or explosion problems, strengthen feature propagations, encourage feature reuses and enhance training efficiency. The network's special architecture mitigates noise interferences and ensures precise identification. The Dense network shows more accuracy and robustness compared to other CNN-based algorithms. We set up a database of 1600 Raman spectra consisting of 32 different types of liquid chemicals. They are detected using different postures as examples of interfered Raman spectra. In the 50 repeated training and testing sets, the Dense network can achieve a weighted accuracy of 99.99%. We have also tested the RRUFF database and the Dense network has a good performance. The proposed approach advances cloud-enabled Raman spectra identification, offering improved accuracy and adaptability for diverse identification tasks.
    Language English
    Publishing date 2023-08-25
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s23177433
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Optically Transparent, Ultra-Broadband, and Water-Based Microwave Meta-absorber with ITO Metasurfaces.

    Yang, Lu / Chen, Kejian / Zhang, Zhengping / Wei, Yuhang / Shen, Yang / Wang, Xiong / Zhuang, Songlin

    ACS applied materials & interfaces

    2023  Volume 15, Issue 46, Page(s) 54098–54104

    Abstract: A transparent in visible wavelengths and ultrabroadband microwave meta-absorber (MMA) based on indium tin oxide (ITO) metasurfaces and a water layer is proposed. After optimizing a series of structural parameters, the proposed MMA can achieve ... ...

    Abstract A transparent in visible wavelengths and ultrabroadband microwave meta-absorber (MMA) based on indium tin oxide (ITO) metasurfaces and a water layer is proposed. After optimizing a series of structural parameters, the proposed MMA can achieve ultrabroadband absorption with an absorption efficiency of more than 90%, covering the frequency range of 9.44-120.92 GHz and a relative absorption bandwidth of 171%. Furthermore, the absorber has many advantages, such as optical transparency, polarization insensitivity, and wide-angle absorption for transverse electric (TE) and transverse magnetic (TM) polarization waves. Moreover, the proposed MMA with 15 × 15 unit cells was fabricated and tested. The fabricated MMA performs well in microwave absorption, as demonstrated by the well-matched experimental results with numerical simulations. These extraordinary advantages mentioned above show that this type of MMAs can be applied in the fields of electromagnetic (EM) stealth, optical windows, and energy collection in the future.
    Language English
    Publishing date 2023-11-08
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.3c11859
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: UVB upconversion of LiYO

    Zhao, Shanshan / Li, Benchun / Shen, Tiantian / Fang, Fang / Zhuang, Songlin / Zhang, Dawei / Yu, Dechao

    Dalton transactions (Cambridge, England : 2003)

    2023  Volume 52, Issue 42, Page(s) 15539–15548

    Abstract: Development of novel ultraviolet (UV) upconversion materials has been emerging as a hot research topic for application in tunable UV lasers, photocatalysis, sterilization, tagging, and most recently luminescence thermometry. We readily synthesized a ... ...

    Abstract Development of novel ultraviolet (UV) upconversion materials has been emerging as a hot research topic for application in tunable UV lasers, photocatalysis, sterilization, tagging, and most recently luminescence thermometry. We readily synthesized a series of Ho
    Language English
    Publishing date 2023-10-31
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d3dt01690k
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Polarization-controllable perfect vortex beam by a dielectric metasurface.

    Xie, Jianfeng / Guo, Hanming / Zhuang, Songlin / Hu, Jinbing

    Optics express

    2021  Volume 29, Issue 3, Page(s) 3081–3089

    Abstract: A perfect vortex beam has been attracting tremendous attention due to the fact that its ring radius is independent of the topological charge. Taking advantage of the superposition principle of phase in Fourier space, we proposed to generate perfect ... ...

    Abstract A perfect vortex beam has been attracting tremendous attention due to the fact that its ring radius is independent of the topological charge. Taking advantage of the superposition principle of phase in Fourier space, we proposed to generate perfect vortex beam using propagation-phase-based dielectric metasurface, which exhibits production efficiency larger than 83.5%. Due to the sensitivity of propagation phase to the polarization of incident beam, two sets of phase profiles can be imposed on a single dielectric metasurface, enabling the simultaneous generation of dual perfect vortex beams. Based on this property, convenient control to the radius and/or topological charge of perfect vortex beam is achieved by switching the incident polarization between two orthogonal polarizations, without redesigning metasurface or changing optical path. What's more important, the crosstalk of these two channels is low, less than 4%. Thus, the propagation-phase method of producing perfect vortex beam will find significant applications in optical communication, particle trapping, particle manipulation and holographic display.
    Language English
    Publishing date 2021-02-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.413573
    Database MEDical Literature Analysis and Retrieval System OnLINE

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