First principles optical properties of silicon and germanium nanowires

... First- principles optical properties of silicon and germanium nanowires M. Bruno a,b , M. Palummo a,b, * , S. Ossicini c , R. Del ... models. 4. Optical properties of SiNWs and GeNWs In Section 5 of the present paper, we aim to point out the importance of the many-body effects on the optica l re- sponse of some of the studied nanowires. ... [41]. 3. Optical...

Ngày tải lên: 16/03/2014, 15:33

... 341–345 Nature of the band gap of silicon and germanium nanowires Clive Harris, E.P. O’Reilly à Tyndall National Institute, Lee Maltings, Cork, Ireland Available online 8 February 2006 Abstract Nanowires of ... the band structures for both Ge and Si nanowires oriented along the (1 0 0), (1 1 0) and (1 1 1) directions. We show that the nature of the band gap and the v...

Ngày tải lên: 16/03/2014, 15:18

... insertion of more impurities (multidoping). Finally, we have studied the effect of B and P codoping on the electronic and optical properties of Si nanowires, thus investigating the role of dimensionality. ... effects of size and shape of Si-nc on the incorporation of group-III (B and Al), group-IV (C and Ge) and group-V (N and P) impurities. Single-doping has...

Ngày tải lên: 16/03/2014, 15:15

... 285–289. © Indian Academy of Sciences. 285 Optical properties of nano -silicon S TRIPATHY, R K SONI*, S K GHOSHAL and K P JAIN Department of Physics, Indian Institute of Technology, New Delhi ... spectra of (a) nano- crystalline Si prepared by pulsed plasma process ing and (b) porous silicon prepared by anodic etching using 488 nm line of Ar + laser. Optical p...

Ngày tải lên: 16/03/2014, 15:31

... of recent achievements in the theoretical investigations of the electronic structure, optical, MO, and XMCD properties of compounds and multilayered structures. Chapter 1 of this book is of ... including the MO properties. Chapter 3 of the book presents the MO properties of f band ferromag- netic materials. Sections 3.1 devoted to the MO properties of 4f compoun...

Ngày tải lên: 17/03/2014, 14:51

... Synthesis and Optical Properties of Colloidal Tungsten Oxide Nanorods Kwangyeol Lee, Won Seok Seo, and Joon T. Park* National Research Laboratory, Department of Chemistry and School of Molecular ... preparation of soluble and highly crystalline tungsten oxide nanorods of varying sizes by a mild, solution-based colloidal approach. A stirred slurry of 0.70 g of W(CO) 6...

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Ngày tải lên: 22/03/2014, 11:20

... the dependence of electronic and optical properties on the size confine- ment and dimensionality [2–5]. Various ZnO structures including nanobrushs [6], nanowires ... and thicknesses of 50 nm. In Fig. 2(c) and (d), FE-SEM images of the submicrorods ZnO is shown. The diameters of ZnO rods are about 100 nm...

Ngày tải lên: 06/05/2014, 13:23

... Li a , Difa Xu b a Department of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, China b Department of Science and Technology, Changsha University, ... pattern (a) and UV–visible optical absorption characteristics (b) of the sea urchin-like ZnO nanostructures. Fig. 2. SEM images (a,b), TEM image (c), HRTEM image (d) and...

Ngày tải lên: 06/05/2014, 13:23

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