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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yang Z. -Y., Ishii S., Yokoyama T., Dao T. D., Sun M. -G., Pankin P. S., Timofeev I. V., Nagao T., Chen K. -P.
Заглавие : Narrowband wavelength selective thermal emitters by confined tamm plasmon polaritons
Место публикации : ACS Photonics: American Chemical Society, 2017. - Vol. 4, Is. 9. - P.2212-2219. - ISSN 23304022 (ISSN), DOI 10.1021/acsphotonics.7b00408
Примечания : Cited References: 41. - This work was supported by the Ministry of Science and Technology (MOST), Taiwan, ROC (MOST 104-2221-E-009-130-MY3)
Ключевые слова (''Своб.индексиров.''): narrowband absorber--tamm plasmon polaritons--thermal emission
Аннотация: This study experimentally demonstrates infrared wavelength selective thermal emission based on Tamm plasmon polaritons (TPPs). Unlike conventional TPP structures, which have a thin metal layer on a distributed Bragg reflector (DBR), the proposed structure has a thick metal under a DBR that is more robust for thermal radiation. The number of DBR pairs is a critical factor in maximizing the narrowband emission needed to satisfy the impedance matching condition, which varies with the choice of metal film. Optimum designs for four different metals, aluminum, gold, molybdenum, and tungsten, are presented. The temporal coupled-mode theory was introduced to explain the origin of the high Q-factor of the proposed structure, which can achieve a twice higher Q-factor for the measured emissivity compared to typical plasmonic thermal emitters. The structure is one-dimensional, consisting of only multilayers and free from nanopatterning, offering a practical design in applications such as gas sensing, narrowband IR sources, and thermophotovoltaics. © 2017 American Chemical Society.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhou J., Luo J., Rong X., Wei P., Molokeev M. S., Huang Y., Zhao J., Liu Q., Zhang X., Tang J., Xia Z.
Заглавие : Lead-Free Perovskite Derivative Cs2SnCl6−xBrx Single Crystals for Narrowband Photodetectors
Место публикации : Adv. Opt. Mater. - 2019. - Vol. 7, Is. 10. - Ст.1900139. - ISSN 21951071 (ISSN), DOI 10.1002/adom.201900139
Примечания : Cited References: 26. - J.Z., J.J.L., X.M.R. contributed equally to this work. The present work was supported by the National Natural Science Foundation of China (Grants 51722202, 91622125, 51572023, and 11774239), Natural Science Foundations of Beijing (2172036), and National Key R&D Program of China (grant no. 2016YFB0700700).
Ключевые слова (''Своб.индексиров.''): band structure--cs2snbr6--cs2sncl6--lead-free perovskite derivatives--narrowband photodetection
Аннотация: Lead-free and stable Sn halide perovskites demonstrate tremendous potential in the field of optoelectronic devices. Here, the structure and optical properties of the “defect” perovskites Cs2SnCl6−xBrx are reported, as well as their use as photodetector materials. Millimeter‐sized Cs2SnCl6−xBrx single crystals are grown by the hydrothermal method, with the body color continuously changing from transparent to yellow and finally to dark red. Narrowband single‐crystal photodetectors using Cs2SnCl6−xBrx crystals are presented, which show a high detectivity of ≈2.71 × 1010 Jones, with narrowband photodetection (full‐width at half‐maximum ≈45 nm) and high ion diffusion barriers. Moreover, the response spectra are continuously tuned from near violet to orange depending on the variation of the bandgap of the single crystals by changing the halide compositions. The strong surface charge recombination of the excess carriers near the crystal surfaces produced by short wavelength light elucidates the narrowband photodetection behavior. This work provides a new paradigm in the design of lead‐free, stable, and high‐performance perovskite derivatives for optoelectronics applications.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Utyushev A. D., Isaev I. L., Gerasimov V. S., Ershov A. E., Zakomirnyi V. I., Rasskazov I. L., Polyutov S. P., Ågren H., Karpov S. V.
Заглавие : Ultra-narrowband selective tunable filters for visible and infrared wavelength ranges [Electronic resource]
Место публикации : ArXiv. - 2019. - Ст.1907.04076
Вид и объем ресурса: Electronic text data
Примечания : Cited References: 57. - The reported study was funded by the Russian Science Foundation (Project No.18-13-00363) (the reflection spectra of plasmonic NPs arrays); the RF Ministry of Science and Higher Education, the State contract with Siberian Federal University for scientific research in 2017–2019 (Grant No.3.8896.2017)(the reflection spectra of all-dielectric NPs arrays); A.E. thanks the grant of the President of Russian Federation (agreement 075-15-2019-676).
Предметные рубрики: Optics
Аннотация: The interaction of non-monochromatic radiation with two types of arrays comprising both plasmonic and dielectric nanoparticles has been studied in detail. We have shown that dielectric nanoparticle arrays provide a complete selective reflection of an incident plane wave within a narrow spectral line of collective lattice resonance with a Q-factor of 103 or larger, whereas plasmonic refractory TiN and chemically stable Au nanoparticle arrays demonstrated high-Q resonances with moderate reflectivity. The spectral position of these resonance lines is determined by the lattice period, as well as the size, shape and material composition of the particles. Moreover, the arrays, with fixed dimensional parameters make it possible to fine-tune the position of a selected resonant spectral line by tilting the array relative to the direction of the incident radiation. These effects provide possibilities for engineering of novel selective tunable optical high-Q filters in a wide range of wavelengths: from visible to middle IR. Several highly refractive dielectric nanoparticle materials with low absorption are proposed for various spectral ranges, such as LiNbO3, TiO2, GaAs, Si, and Ge.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tyurnev V. V., Serzhantov A. M.
Заглавие : Dual-mode split microstrip resonator for compact narrowband bandpass filters
Место публикации : Prog. Electromagn. Res. C. - 2011. - Vol. 23. - С. 151-160. - ISSN 19378718 (ISSN), DOI 10.2528/PIERC11062104
Ключевые слова (''Своб.индексиров.''): 1-d models--average frequency--dual modes--dual-mode filter--microstrip resonator--narrow bands--oscillation mode--pass bands--structure parameter--transmission zeros--bandpass filters--frequency response--natural frequencies--resonators--microstrip filters
Аннотация: A straight split dual-mode microstrip resonator is proposed. The frequencies of the two first oscillation modes in the resonator may be brought closer together by adjusting a split parameter whereas the frequency of the third mode remains approximately equal to the doubled average frequency of the first and the second modes. It is shown that formulas derived within 1D model give qualitatively true relations between the resonant frequencies and the structure parameters of the resonator. Examples of narrowband bandpass filters of the fourth and the sixth order are described. Transmission zeros below and above the passband substantially improve the filter's performance. The simulated frequency response of the three-resonator dual-mode filter is compared with the measured response of the fabricated filter.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Belyaev B. A., Leksikov A.A., Govorun I. V., Izotov A.V., Serzhantov A.M.
Заглавие : Narrowband stripline filter on suspended substrate
Коллективы : International Crimean Conference Microwave and Telecommunication Technology, CriMiCo 2014
Место публикации : KpbiMuKo 2009 CriMiCo - 2009 19th International Crimean Conference Microwave and Telecommunication Technology, Conference Proceedings. - 2009. - P.503-504. - ISBN 9789663352497 (ISBN)
Ключевые слова (''Своб.индексиров.''): narrow band filter--narrow bands--stripline filters--stripline resonators--suspended substrates--microwaves--strip telecommunication lines--computer crime
Аннотация: A method of decreasing of interaction between stripline resonators on a suspended substrate that allows reducing sizes of narrowband filters on their base is proposed. © 2009: CriMiCo'2009 Organizing Committee.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chen J., Zou X., Li W., Zhang H., Zhang X., Molokeev M. S., Liu Y., Lei B.
Заглавие : Strategy to construct high thermal-stability narrow-band green-emitting Si-CDs@MAs phosphor for wide-color-gamut backlight displays
Место публикации : Adv. Opt. Mater. - 2022. - Vol. 10, Is. 21. - Ст.2200851. - ISSN 21951071 (ISSN), DOI 10.1002/adom.202200851
Примечания : Cited References: 47. - The work was supported by the Ministry of Science and Technology of China (No. G2021030022L), the Guangdong Provincial Special Fund for Modern Agriculture Industry Technology Innovation Teams (No. 2021KJ122), the National Natural Science Foundations of China (No. 52102042), the Independent Research and Development Projects of Maoming Laboratory (No. 2021ZZ004), the Key Realm R&D Program of Guangdong Province (No. 2021B0707010003), the Guangzhou Science & Technology Project (Nos. 202007020005 and 202103000059), the Guangdong Provincial Science and Technology Project (Nos. 2021A0505050006 and 2022A1515010229), and the Project of GDUPS (2018) for B.L.
Аннотация: Developing innovative narrow-band green-emitting phosphors featuring low thermal quenching and eco-friendliness for white light-emitting diode (WLED) backlights is a pivotal challenge. Benefitting from narrowband and low toxicity of green-emitting silanized carbon dots (Si-CDs), an efficient confinement and protection strategy through embedding Si-CDs in mesoporous aluminas (MAs) is proposed to construct MAs and Si-CDs composites (Si-CDs@MAs) with superior luminescence properties. Si-CDs@MAs phosphor exhibits green emission at 526 nm with narrow full width at half maximum of 51 nm, zero-thermal quenching even up to 423 K (104.1%@423 K of the emission peak intensity at 298 K), and the internal quantum efficiency of 64.46%. Compared with broad-band yellow-emitting solid-state Si-CDs (S-Si-CDs), the thermal stability, photostability, and water stability of Si-CDs@MAs phosphor are remarkably improved due to surface protection. The WLED backlight is fabricated with optimized Si-CDs@MAs phosphor, which shows high luminous efficacy of 117.43 lm W?1 and wide color gamut (107% NTSC). Furthermore, this work provides the design principles of realizing stable narrow-band solid-state fluorescence carbon dots, suggesting its great potential for wide-color-gamut display application.
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