Locus of reflectivity in complex coordinates during surface plasma resonance 光激發(fā)表面等離子體波反射系數(shù)在復(fù)平面的軌跡
Determination of carrier concentration in gallium arsenide by the plasma resonance minimum 砷化鎵中載流子濃度等離子共振測量方法
On the other hand , the microscopic principle of surface plasma resonance is explicated . the device , parameters , factors and the concrete applications of the prism spws are studied 其次討論了棱鏡表面等離子體波傳感器的設(shè)計(jì)、參數(shù)、影響其特性的因素以及棱鏡表面等離子體波傳感器的具體應(yīng)用。
We infered that this new absorption band was associated with the effect of charge - transfer transition between adsorbates and colloidal silver particles , not the effect of the surface plasma resonance due to the silver particles aggregation which was usually attributed to in previous research work 我們將其歸因于與納米銀顆粒表面間的電荷轉(zhuǎn)移效應(yīng)( ct ) ,而非通常所認(rèn)為的因銀膠凝聚而產(chǎn)生的表面等離子體共振吸收效應(yīng)。
The infrared results showed that the ir characteristic value l080cm - lof cubic crystal sio , and the absorption peak 460cm - l of mgf , caused by the interaction between f - - mg ' + - p elastic vibration and photon radiation , appeared in the ir spectra . ellipsometric analysis showed that the typical absorption peaks 58lnm , 589nm and 606nm , resulting from the surface plasma resonance of cu panicles and reflecting the absorption on composite film system , appeared in the extinction coefficient k curves of cu ( voll5 % ) mgf , , cu ( vol20 % ) mgf , and cu ( vol30 % ) mgf , cermet films , respectively . with the component of cu increasing , the peak site presented red shift , which was in accordance to the results of ultraviolet - visible spectra 橢偏測試分析表明: cu ( vol15 ) mgf _ 2 、 cu ( vol20 ) mgf _ 2和cu ( vol30 ) mgf _ 2樣品的消光系數(shù)k曲線中出現(xiàn)了反映復(fù)合金屬陶瓷體系吸收的由cu金屬顆粒表面等離子體共振引起的吸收峰,峰位分別為581nm 、 589nm和606nm ,呈現(xiàn)紅移,這些與紫外-可見光譜測試結(jié)果相一致;此外, cu - mgf _ 2復(fù)合納米金屬陶瓷薄膜光學(xué)常數(shù)的實(shí)驗(yàn)值與考慮尺寸效應(yīng)修正過的mg理論值總體上符合得很好。
The absorption characteristics was that the surface plasma absorption peak appeared around 570 nm shifted to a short wavelength and strengthened as the cu composition increased . but the maximal shift range of the absorption - edge preponderated over 500 nm , and leaded that the dipolar plasma resonance absorption peak were covered up and gradually disappeared in the absorption spectrum . we theoretically explained the mechanism of the modulating action 實(shí)驗(yàn)觀察到cu表面等離子體共振吸收峰位在570lun附近的吸收邊頻移量超過了500nln .理論分析表明,吸收峰位的移動(dòng)主要源于偶極共振,而峰形的寬化主要由納米粒子的表面效應(yīng)和量子尺寸效應(yīng)引起
Excited with 228nm , the emission bands centered at about 365nm and 460nm originate from the electron transitions of 1d2 - 1s0 and 3d - 1s0 in ag + respectively , and the emission band at 400nm results from the surface plasma resonance of the silver nanoparticles , which aggregated near the surface of the films 在228nm光激發(fā)下,復(fù)合膜中ag ~ +的電子的~ 1d _ 2 ~ 1s _ 0躍遷和~ 3d ~ 1s _ 0躍遷分別在365和460nm附近發(fā)光,聚集在復(fù)合膜表面的納米銀粒子的表面等離激元共振導(dǎo)致了400nm附近的發(fā)光。
The study indicates that self - assembly monolayer membrane of au nanoparticle distributes as sub - monolayer . after au nanoparticles are assembled in multilayer , surface plasma resonance absorption peak got a red shift because of the polarizing effect of the surrounding media and the coupling effect of surface plasma waves between the next au nanoparticles 研究表明au納米粒子的自組裝單層薄膜呈亞單層分布, au納米粒子組裝到多層復(fù)合薄膜中后,由于周圍介質(zhì)的極化作用以及相鄰au納米粒子間的表面等離子體波的耦合作用,表面等離子共振吸收峰出現(xiàn)紅移和展寬。
As the position , intensity and width of the plasma resonance absorption peak are concerned , we find that maxwell - garnett and ping sheng theories are applicable for the cermet films with low metal volume fraction , while bruggeman theory fits better than maxwell - garnett theory for au - mgf2 films with high metal volume fraction 就金屬顆粒表面等離子共振引起的吸收峰的峰位、強(qiáng)度和峰形而言,對(duì)低金屬組分的納米金屬陶瓷薄膜光學(xué)常數(shù)的計(jì)算, maxwell - garnett和pingsheng要比bruggeman理論結(jié)果好。