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Influence of near-field electromagnetic interactions on optical properties of perfect lens consisting of left-handed material
No full textIn this paper, we investigate the surface plasma resonance of a slab of left-handed material (LHM).We use the transfer matrix method to calculate the attenuated total reflection spectra of the LHM slab. The intrinsic parameters of the LHM slab are suitable chose so that the slab has both negative permittivity & permeability in a frequency range of visible light. We have calculated the cases with different slab thickness & various dielectrics surrounding the LHM slab
Plasmonic effects of metal and negative refraction slab
No full text在這篇論文中，我們將概略介紹光與物質交互作用之基本電磁理論、平板結構的表面電漿共振理論以及負折射物質之基本性質，並以傳輸矩陣的方法，計算鋁金屬與負折射物質平板系統的ATR光譜以及電場強度的空間分佈。從計算的結果中可以看出，不論是鋁金屬或負折射物質平板系統，當入射光之頻率與波向量符合激發平板系統之表面電漿共振條件時，在金屬或負折射物質中以及其與周圍介電物質介面處之電場強度將有明顯增強的現象，此外，我們也可以看出，配合適當的入射光條件與金屬或負折射物質平板之厚度，將可以使平板系統達到一個最大的表面電漿共振強度。In this thesis we investigate the surface plasmon resonance properties of a metal (Al) or negative refraction material slab. We use transfer matrix method to calculate the attenuated total reflection (ATR) spectrum and field distribution of the slab material. Calculated results show the field intensity has been enhanced within and at the boundary of the slab material when the frequency and wave vector of incident light correspond to the surface plasmon resonance condition. In conclusion, we found that with proper thickness of slab and light frequency the strength of surface plasmon resonance can be a maximum.致謝......................................................I
中文摘要.................................................II
英文摘要................................................III
目錄 ....................................................IV
圖目錄 ..................................................VI
表目錄 ..................................................XI
第一章 序論 ………………………………………………………… 1
1-1 前言 …………………………………………………………… 1
1-2 研究動機………………………………………………………… 3
參考資料……………………………………………………………… 6
1-3表面電漿之應用 ………………………………………………… 8
參考資料……………………………………………………………… 10
第二章 基本電磁理論 ……………………………………………… 12
2-1 光與物質交互作用 …………………………………………… 12
(a) 介電物質………………………………………………………… 14
(b) 金屬 …………………………………………………………… 21
(c) 尺寸效應的影響 ……………………………………………… 30
(d) Fresnel 關係式 ……………………………………………… 31
2-2 金屬表面電漿 ………………………………………………… 37
(a) 金屬塊材的電漿模態 ………………………………………… 37
(b) 金屬的表面電漿模態 ………………………………………… 40
(c) 有限厚度平板的表面電漿模態 ……………………………… 47
2-3 負折射物質(左手物質)介紹 ………………………………… 52
參考資料…………………………………………………………… 65
第三章 平板系統的表面電漿探討 ……………………………… 66
3-1 計算與模擬方法 ……………………………………………… 66
3-2 金屬平板系統 ………………………………………………… 71
(a) 對稱結構之金屬平板系統 (玻璃/鋁金屬/玻璃) ……… 71
(b) 非對稱結構之金屬平板系統 (玻璃/鋁金屬/空氣) …… 83
3-3 負折射物質(左手物質)平板系統 …………………………… 87
(a) 對稱結構之負折射物質平板系統 (玻璃/負折射物質/玻璃) …………………………………………………………………… 88
(b) 非對稱結構之負折射物質平板系統 (玻璃/負折射物質/空氣) …………………………………………………………………… 93
參考資料……………………………………………………………… 97
第四章 結論與展望 ………………………………………………… 9
Surface plasmon polariton coupling between nano recording marks and their effect on optical read-out signal
No full textMultiple metallic-shell nanocylinders for surface-enhanced spectroscopes
Full text linkAbstractThe optical properties of multiple dielectric-core-gold-shell nanocylinder pairs are investigated by two-dimensional finite difference time domain method. The core-shell cylinders are assumed to be of the same dimension and composition. For normal incidence, the diffraction spectra of multiple cylinder pairs contain the lightning-rod plasmon mode, and the electric field intensity is concentrated in the gap between the nanocylinder pairs in the infrared region. The resonance wavelength and local field enhancement of this plasmon mode can be tuned by varying the pair-distance between the pairs, the gap-distance between the pairs, and the optical constants of the dielectric-core and the surrounding medium. The results show that the multiple core-shell nanocylinder pair contains the plasmon mode same as that of the solid metallic cylinder pairs at the long wavelength part of the spectrum. The large electric field intensity in the infrared region at long wavelength makes multiple core-shell cylinders as ideal candidates for surface-enhanced spectroscopes.</jats:p
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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