Optical properties of solids chuong 10 phonon

... studies of electronic properties of solids If we think of the optical properties for various classes of materials, it is clear from Fig 3.3 that major differences will be found from one class of materials ... Chapter Absorption of Light in Solids References: • Ziman, Principles of the Theory of Solids: Chapter • Bassani and Pastori–Parravicini, Electronic States and...

Ngày tải lên: 24/04/2014, 17:13

Ngày tải lên: 13/05/2014, 09:07

... asymptotically the value of the band-gap of the undoped Si-nw This is another indication of how doping can modify the electronic and optical properties of the Si nanostructures Conclusions 3.2 3.4 ... systematic analysis of the effect of the B and P codoping in Si-nw, concentrating not only on the structural properties but also on how doping i...

Ngày tải lên: 16/03/2014, 15:15

... Raman spectra of (a) nanocrystalline Si prepared by pulsed plasma processing and (b) porous silicon prepared by anodic etching using 488 nm line of Ar+ laser Optical properties of nano- silicon 287 ... 1⋅82 Optical properties of nano- silicon 289 clear distinction between hydrogen free and hydrogenated clusters Figure Plots of gap energy as a function of number of...

Ngày tải lên: 16/03/2014, 15:31

... models Optical properties of SiNWs and GeNWs In Section of the present paper, we aim to point out the importance of the many-body effects on the optical response of some of the studied nanowires ... [41] Optical gaps in SiNWs and GeNWs: quantum confinement and anisotropy effects In this section, we will describe the electronic properties of hydrogen passivated, free...

Ngày tải lên: 16/03/2014, 15:33

... arc-lamp, excitation at 275 nm) of the three tungsten oxide nanorod samples of various lengths dissolved in dichloromethane Figure Photoluminescence spectra of tungsten oxide nanorods; 25 ( nm (short), ... micrographs of (a) ( 0.5 nm × 25 ( nm and (b) ( 1.5 nm × 130 ( 30 nm tungsten oxide nanorods Little is known about the photoluminescence of nanostructured tungst...

Ngày tải lên: 20/03/2014, 13:08

Ngày tải lên: 22/03/2014, 11:20

... growth quality of the BFO thin film for further optical measurement and analysis Page of SE measurements were taken to investigate the optical properties of the BFO film Considering the optical investigation ... substrate/buffer layer /film structure, we should firstly obtain the optical response of the STO substrate and SRO buffer layer and then research the optical...

Ngày tải lên: 06/05/2014, 09:01

... morphology effects of ZnO pigments on their optical properties The synthesis conditions were according to our previous works [18,19] Typical synthesis conditions of ZnO powders synthesized in this ... concentration of zinc nitrate and potassium hydroxide solutions (Molar) Experimental 2.1 Preparation of pigments ZnO samples were prepared by hydrothermal method and us...

Ngày tải lên: 06/05/2014, 13:23

... and SAED pattern of the sea urchin-like ZnO nanostructures are presented in Fig Fig 2a and b displays the low magnification and high magnification SEM images of the sea urchin-like ZnO nanostructures, ... pattern (a) and UV–visible optical absorption characteristics (b) of the sea urchin-like ZnO nanostructures Fig SEM images (a,b), TEM image (c), HRTEM image (...

Ngày tải lên: 06/05/2014, 13:23

... field Sergio G Rodrigo Optical Properties of Nanostructured Metallic Systems Studied with the Finite-Difference Time-Domain Method Doctoral Thesis accepted by The University of Zaragoza, Spain 123 ... of the metal, dependence on the metal thickness and the study of optical properties of metal coated microspheres), the optical properties of m...

Ngày tải lên: 29/05/2014, 18:40

... Biosynthesis of Bimetallic Au-Ag Alloy Nanoparticles”, Small, Vol 1, pp 517-520, 2005 [25 P Raveendran, J Fu, and S L Wallen, “A simple and green method for the synthesis of Au, Ag, and Au–Ag alloy ... Figure Calculated optical absorption spectra for Au-Ag bimetallic colloidal solutions with different molar ratios of Au and Ag Conclusions Au-Ag nanoclusters of...

Ngày tải lên: 04/06/2014, 15:20

... applications The 2-MeV ions only have a minor effect on optical properties of the LED devise after irradiation with moderate fluences Conclusion In summary, the influence of He+ ion irradiation on the ... eV) The observation of the band-edge emissions at 380 nm (3.26 eV) are attributed to the first and second longitudinal optical (LO) phonon replica This is con...

Ngày tải lên: 18/06/2014, 22:20

... applications The 2-MeV ions only have a minor effect on optical properties of the LED devise after irradiation with moderate fluences Conclusion In summary, the influence of He+ ion irradiation on the ... eV) The observation of the band-edge emissions at 380 nm (3.26 eV) are attributed to the first and second longitudinal optical (LO) phonon replica This is con...

Ngày tải lên: 20/06/2014, 04:20