Please use this identifier to cite or link to this item: http://rportal.lib.ntnu.edu.tw:80/handle/20.500.12235/112038
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dc.contributor蕭惠心zh_TW
dc.contributor.author葛浩zh_TW
dc.contributor.authorKe, Haoen_US
dc.date.accessioned2020-10-19T07:12:22Z-
dc.date.available不公開
dc.date.available2020-10-19T07:12:22Z-
dc.date.issued2020
dc.identifierG060777005H
dc.identifier.urihttp://etds.lib.ntnu.edu.tw/cgi-bin/gs32/gsweb.cgi?o=dstdcdr&s=id=%22G060777005H%22.&%22.id.&
dc.identifier.urihttp://rportal.lib.ntnu.edu.tw:80/handle/20.500.12235/112038-
dc.description.abstract結合陽極氧化鋁模板與金屬顆粒球設計之表面增強拉曼散射(SERS)基板,過去經常利用金屬奈米顆粒球的電偶極共振偶合來增強近場,來產生所謂的熱點來增益拉曼訊號。然後,在增強表面電場的同時,穿透進金屬顆粒球的電場也隨之增高,造成在測量時,往往會得到較高的連續背景值,而使得整體訊號的訊雜比降低。因此,在本論文中,我們研究了一系列不同直徑及間隙大小的銀奈米顆粒球陣列之近場特徵,以及探討其對SERS訊號之近場增益、背景值與訊雜比之局部效應與整體平均值影響。接著,為進一步達到訊號增益與訊雜比的提升,我們探討了金屬顆粒球陣列結合週期性光柵的雙共振SERS基版,系統性的分析週期性光柵的高度、週期以及氧化鋁的厚度以優化金屬顆粒球之侷域性表面電漿共振與週期性光柵產生之表面電漿共振的耦合,相較於平面型SERS基版,此雙共振基版成功提升SERS訊雜比達2.7倍。zh_TW
dc.description.abstractIn the past, the anodic aluminum oxide template combined with metallic nano-particles have been one of popular designs for the enhancement of Raman scattering signal. Generally, the coupling of the electric dipole resonances among nanoparticles was applied to create strong near-field intensity, the so-called “hot spot” for surface-enhanced Raman scattering (SERS) substrate. Despite of SERS signal enhancement, a broadband background continuum, arisen from the penetration field inside the nanoparticles, was commonly observed and deteriorates the signal-to-background (S/B) ratio. In this thesis, we thoroughly investigate the near-field features of the plasmonic resonances by changing the diameters of silver nanoparticles and gap size. Their effects on the SERS enhancement, background value and S/B ratio were studied by considering both the local field amplification and ensemble-average effect. In addition, a double resonance substrate comprising of silver nanoparticles on periodic gratings was developed to further enhance both the near-field enhancement and the S/B ratio. A systemic study of the effect of the grating modulation depth, period, and the thickness of anodic aluminum oxide were performed to optimize the coupling of localized surface plasmon and surface plasmon polaritons for achieving higher S/B ratio. The double resonance substrate reaches 2.7 times enhancement of S/B ratio than the planar SERS substrate.en_US
dc.description.sponsorship光電工程研究所zh_TW
dc.language中文
dc.subject表面增強拉曼散射zh_TW
dc.subject多極共振zh_TW
dc.subject熱點zh_TW
dc.subject陽極氧化鋁zh_TW
dc.subjectSERS訊雜比zh_TW
dc.subject多模態共振zh_TW
dc.subject光柵zh_TW
dc.subjectsurface-enhanced raman scatteringen_US
dc.subjectmultipolar resonancesen_US
dc.subjecthot spotsen_US
dc.subjectanodic aluminum oxideen_US
dc.subjectsignal-to-background ratioen_US
dc.subjectdouble resonanceen_US
dc.subjectgratingen_US
dc.title陽極氧化鋁表面增益拉曼基板之訊雜比優化zh_TW
dc.titleOptimization of the signal-to-background ratio for anodic aluminum oxide based surface-enhanced Raman scattering substrateen_US
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