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  • 1
    Online Resource
    Online Resource
    Optica Publishing Group ; 2021
    In:  Photonics Research Vol. 9, No. 10 ( 2021-10-01), p. 2125-
    In: Photonics Research, Optica Publishing Group, Vol. 9, No. 10 ( 2021-10-01), p. 2125-
    Abstract: Highly customized and miniaturized structured light is expected in many application fields. A kind of structured vortex generators is proposed based on a metasurface consisting of rectangular nanoholes etched in a silver film, and the generated vortices with the same or different topological charges are distributed along the radial direction. The geometric metasurface is completed with the help of optical holography technology, and the structured vortex generator possesses high working efficiency and large information capacity. The proposed vortex generators work under circularly polarized light illumination, and the reproduced vortices of multiplexing vortex generator depend on the handedness of the circularly polarized light. This work paves a way to generate new structured light fields. The radially distributed vortices may be utilized to simultaneously screen or separate microparticles. The compact design of the structured vortex generator and the convenient switch of different structured vortices will be a benefit to expand the applications of structured vortex fields.
    Type of Medium: Online Resource
    ISSN: 2327-9125
    Language: English
    Publisher: Optica Publishing Group
    Publication Date: 2021
    detail.hit.zdb_id: 2724783-1
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  • 2
    Online Resource
    Online Resource
    IOP Publishing ; 2019
    In:  New Journal of Physics Vol. 21, No. 12 ( 2019-12-01), p. 123047-
    In: New Journal of Physics, IOP Publishing, Vol. 21, No. 12 ( 2019-12-01), p. 123047-
    Abstract: A kind of metasurface cylindrical vector light (CVL) generator in the visible region is proposed. This kind of CVL generator consists of nanometer holes etched on silver film, and it can change any linearly or circularly polarized light into the CVL in nanoscale. The order of the generated CVL is controlled by the rotation of the holes and its polarization state changes with the incident polarization condition. The base transformation theory guides is used to design the metasurface. The numerical simulations for the transmission of the proposed CVL generators confirm the validity of the theoretical predictions, and they also provide the available parameters for practical metasurface devices. The experimental results verify the performance of the proposed metasurface CVL generators. This kind of vector light generator has the advantages of thin and compact structure, polarization multiplexing and convenient manufacture. This work paves a new path for designing the miniature devices to generate the vector light field and it will promote the applications of polarization devices in optical integration and micro-manipulation.
    Type of Medium: Online Resource
    ISSN: 1367-2630
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 1464444-7
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  • 3
    Online Resource
    Online Resource
    IOP Publishing ; 2020
    In:  New Journal of Physics Vol. 22, No. 10 ( 2020-10-01), p. 103064-
    In: New Journal of Physics, IOP Publishing, Vol. 22, No. 10 ( 2020-10-01), p. 103064-
    Abstract: Several metasurface diffraction-free beam generators are designed by using a set of resonant V-shaped nanoholes. Cosine beams, Bessel beams and cosine Bessel beams are generated through the corresponding metasurface structures with V-shaped nanoholes arranged in different ways. Theoretical analysis provides the design mechanism for these diffraction-free beam generators, numerical simulations and experiment measurement give the powerful verification for the generation of diffraction-free beams. The proposed diffraction-free beam generators have advantages of ultra-thin thickness, compact structure, ease to manufacture and flexibility to operate. The generated diffraction-free beams show high efficiency, polarization independence and validity for any visible wavelength. The compact design is benefit to the applications of diffraction-free beams in nanometer fabrication, optical integrated imaging and optical micromanipulation.
    Type of Medium: Online Resource
    ISSN: 1367-2630
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 1464444-7
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  • 4
    Online Resource
    Online Resource
    IOP Publishing ; 2021
    In:  Nanotechnology Vol. 32, No. 31 ( 2021-07-30), p. 315203-
    In: Nanotechnology, IOP Publishing, Vol. 32, No. 31 ( 2021-07-30), p. 315203-
    Abstract: A circular polarizer is proposed based on a single layered metasurface. This metasurface circular polarizer is composed of L-shaped nanoholes etched on the silver film. The L-shaped nanoholes are rotational symmetric, and the special symmetric structure determines the polarization selection transmission of the metasurface. The theoretical analysis elaborates the design process of the metasurface circular polarizer. The proposed metasurface circular polarizers have good polarization selective transmittance, and more interestingly, they take on the opposite circular dichroism at different wavebands. The numerical simulations and experiment measurement confirm the circular dichroism of the proposed circular polarizers. The compact design, ultrathin thickness and available performance can expand the applications of the metasurface circular polarizers in the integrated optics.
    Type of Medium: Online Resource
    ISSN: 0957-4484 , 1361-6528
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 1362365-5
    SSG: 11
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  • 5
    Online Resource
    Online Resource
    IOP Publishing ; 2020
    In:  Nanotechnology Vol. 31, No. 30 ( 2020-07-24), p. 305201-
    In: Nanotechnology, IOP Publishing, Vol. 31, No. 30 ( 2020-07-24), p. 305201-
    Type of Medium: Online Resource
    ISSN: 0957-4484 , 1361-6528
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 1362365-5
    SSG: 11
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  • 6
    Online Resource
    Online Resource
    IOP Publishing ; 2020
    In:  New Journal of Physics Vol. 22, No. 7 ( 2020-07-01), p. 073021-
    In: New Journal of Physics, IOP Publishing, Vol. 22, No. 7 ( 2020-07-01), p. 073021-
    Abstract: A kind of controllable multi-wavelength focusing metalenses is proposed. The proposed metalenses consist of identical nanometer holes etched in silver film and the beam focusing at three primary wavelengths is controlled without additional phase compensation. Transmission field of metalens satisfies the in-phase interference condition at different wavelength and the fixed focal effect for three primary wavelengths and the color separation along the transverse or longitudinal direction are realized respectively. Simulation and experimental results verify the controllable focusing performance of the proposed metalenses. Simple design, convenient manufacture and effective color controllable focusing of these proposed metalenses are helpful for the applications of metalenses in lightweight chromatically-corrected displaying and imaging systems.
    Type of Medium: Online Resource
    ISSN: 1367-2630
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 1464444-7
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  • 7
    Online Resource
    Online Resource
    IOP Publishing ; 2021
    In:  New Journal of Physics Vol. 23, No. 3 ( 2021-03-01), p. 033013-
    In: New Journal of Physics, IOP Publishing, Vol. 23, No. 3 ( 2021-03-01), p. 033013-
    Abstract: Highly localized plasmonic vortices carrying orbital angular momentum are of importance for many applications. Yet, it is a challenge to generating plasmonic vortex with a high topological charge because of no available technique. Here, a novel plasmonic vortex generator is proposed based on spiral nanoslits etched in a metal film, which can produce a high order plasmonic vortex. The consecutive spiral nanoslit can generate plasmonic vortex with high intensity and the segmented nanoslits enhances the controllability of the plasmonic vortex, which are demonstrated numerically and experimentally. High order plasmonic vortex generation will broaden the prospects for plasmonic vortices in practical applications for nanomanipulation and nanofabrication.
    Type of Medium: Online Resource
    ISSN: 1367-2630
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 1464444-7
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  • 8
    In: Journal of Clinical Medicine, MDPI AG, Vol. 12, No. 3 ( 2023-02-01), p. 1164-
    Abstract: Purpose: To evaluate the efficacy and safety of eyelid hygiene using topical 0.01% hypochlorous acid (HOCL) through ultrasonic atomization after 2 weeks in patients with blepharitis. Design: Randomized controlled trial. Methods: Patients with blepharitis were randomized into two groups: topical 0.01% HOCL through ultrasonic atomization (HOCL group, 42 eyes) or eyelid scrubs (control group, 37 eyes). Patients in both groups received warm compresses twice daily and topical 0.5% levofloxacin three times a day. Primary outcomes were the ocular surface disease index scores (OSDI), lid margin redness, lid margin abnormalities, meibum expressibility, meibum quality, and noninvasive breakup time after 2 weeks. Secondary outcomes were conjunctiva redness, corneal fluorescein staining, and tear meniscus height. A questionnaire of treatment adherence with a free response section was administered to confirm patient compliance and comments. Results: Sixty-seven participants participated in this study. Both groups show an improvement in all primary outcomes, while statistically significant improvements in OSDI, lid margin redness, lid margin abnormality, meibum expressibility and quality are only limited to the HOCL group after 2 weeks of treatment (p 〈 0.05, p 〈 0.05, p 〈 0.001, p 〈 0.001 and p 〈 0.001, respectively). Subgroup analysis in HOCL reveals that only the change in lid margin abnormality and meibum expressibility in the mild–moderate meibomian glands loss patients at baseline has a statistically significant difference p 〈 0.05). Multiple linear regression shows that the improvement in OSDI is negatively associated with meibum expressibility score at the baseline (95% CI [−28.846, −1.815], p = 0.028). The patient compliance is 7.1 ± 2.0 in the HOCL group and 7.1 ± 1.8 in the control group (p 〉 0.05). No adverse events are reported. Conclusion: Topical 0.01% HOCL through ultrasonic atomization is a tolerable and effective eyelid hygiene treatment for blepharitis.
    Type of Medium: Online Resource
    ISSN: 2077-0383
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2662592-1
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  • 9
    Online Resource
    Online Resource
    Springer Science and Business Media LLC ; 2023
    In:  Graefe's Archive for Clinical and Experimental Ophthalmology
    In: Graefe's Archive for Clinical and Experimental Ophthalmology, Springer Science and Business Media LLC
    Type of Medium: Online Resource
    ISSN: 0721-832X , 1435-702X
    RVK:
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 1459159-5
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  • 10
    Online Resource
    Online Resource
    Frontiers Media SA ; 2024
    In:  Frontiers in Public Health Vol. 11 ( 2024-1-5)
    In: Frontiers in Public Health, Frontiers Media SA, Vol. 11 ( 2024-1-5)
    Abstract: Intimate partner violence (IPV) and child malnutrition are global public health issues. Assessing the association between IPV and child anthropometric failures (stunting, underweight, and wasting) in 29 Sub-Saharan African (SSA) countries can provide significant global health solutions. Some studies have found an association between IPV against women and child malnutrition, but the conclusions are inconsistent. The physical and psychological conditions, living environment, and rights of the mother may be involved. Methods We collected and analyzed the Demographic and Health Surveys data (2010–2021) of 29 SSA countries. The main exposure variables were various types of IPV, classified as physical, sexual, and emotional violence. The outcome was the child’s development index, which can be roughly divided into stunting, wasting, and underweight. An adjusted binary logistic regression model was used to test the relationship between IPV and children’s nutritional status. Results A total of 186,138 children under 5 years of age were included in the analysis; 50,113 (27.1%) of the children were stunted, 11,329 (6.1%) were wasted, and 39,459 (21.3%) were underweight in all regions. The child’s gender, age, duration of breastfeeding, complementary feeding, and vitamin A supplements intake in the past 6 months were associated with their nutritional status ( p & lt; 0.001). Sexual violence was the strongest factor associated with stunting, which remained statistically significant after controlling all variables (AOR = 1.11; 95% CI: 1.02, 1.21; p = 0.012). We also found a small negative association between wasting and IPV. For underweight, there were no associations with IPV after controlling for all variables ( p & gt; 0.05). Conclusion IPV is positively associated with child stunting in SSA countries. Sexual violence showed a strong positive correlation with stunting. Wasting was unexpectedly negatively associated with IPV. There was no clear correlation between underweight and violence.
    Type of Medium: Online Resource
    ISSN: 2296-2565
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2024
    detail.hit.zdb_id: 2711781-9
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