optical properties of thin films

... study of the electrical and optical properties of this compound in thin film formation Since the optimization of device performance requires a well-established knowledge of the electrical and optical ... knowledge of the electrical and optical properties of GaSe thin films, in this paper, we report the results on electrical and optical measurements of amorphous thin films of GaSe nanorods prepared by vacuum ... diameter of the nanorods varies from 140 to 180 nm, and the length is of several hundreds of nanometers Figure presents the temperature dependence of the dc conductivity of thin films of a- GaxSe100-x...

Ngày tải lên: 21/06/2014, 17:20

... temperatures on the structural properties of the films has been investigated, and the optical properties of the films have also been analyzed Methods Synthesis ZnS films were deposited onto a Corning ... and optical properties of CdS thin films grown by chemical bath deposition Thin Solid Films 2009, 518:1259-1262 Liu F, Lai Y, Liu J, Wang B, Kuang S, Zhang Z, Li J, Liu Y: Characterization of ... However, the FWHM value of the film prepared at 400°C increased to 0.154°, indicating the deterioration of the crystallinity of the films The mean crystallite sizes of the films were about 22.3,...

Ngày tải lên: 20/06/2014, 21:20

... characterization technique of thin films of Ti1-xTaxO2 PLD technique has been used for the film fabrication X-ray diffraction (XRD) studies have been carried out on the epitaxially grown thin films on STO ... reproduction of the stoichiometry of the charged material and in situ deposition of oxides without the requirement of any post-deposition process adds to the advantage of the technique On top of all ... application of RBS is the thickness measurement of thin film, because the width of the peak in the spectrum is proportional to the thickness (t) of the sample (Fig 2.3) once the density of the film...

Ngày tải lên: 08/09/2015, 15:20

... effect of the films for optical properties The thickness of the ZnO thin films was checked by FE-SEM and was fixed at 100 nm Three growth angles (0°, 15°, and 30°) of the columnar ZnO films were ... of electrodeposited ZnO thin films Thin Solid Films 2008, 516:3893-3898 Bragg WL, Bragg WH: The Crystalline State New York: McMillan; 1933 15 30 o Growth angle ( ) Figure Reflectance of ZnO films ... increase compared with that of the 15° angle reflectance Conclusions We investigated the optical properties of antireflection coating on columnar structured ZnO films The ZnO films were deposited on...

Ngày tải lên: 21/06/2014, 17:20

... Chapter 10 Electrical and Magnetic Properties of Thin Films 451 10.1 Introduction to Electrical Properties of Thin Films 451 Conduction in Metal Films ... 10.4 10.5 10.6 10.7 Chapter 1 Optical Properties of Thin Films 507 11.1 Introduction 507 11.2 Properties of Optical Film Materials ... years Thin Films - A Historical Perspective Thin- film technology is simultaneously one of the oldest arts and one of the newest sciences Involvement with thin films dates to the metal ages of antiquity...

Ngày tải lên: 05/03/2014, 17:20

... position of Fig 11), approaching 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 ... 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 influences the electronic and optical properties Here, ... the electronic properties of the Si-nc are influenced by the insertion of more and more impurities We call this insertion of several impurities multidoping Fig shows how the FE of a large Si147H100-nc...

Ngày tải lên: 16/03/2014, 15:15

... 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 Si atoms and effective size of ... PL spectra of Si-doped SiO2 thin films under different preparation conditions (a) 36 pieces of Si targets annealed in Ar, (b) 36 pieces of Si targets annealed in O2, (c) 16 pieces of Si target ... 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...

Ngày tải lên: 16/03/2014, 15:31

... simple EMA 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 ... onset of optical absorption is found only in the case of GeNWs and not in the case of SiNWs With the inclusion of the excitonic effects (bottom panels) we see that an important transfer of the ... different geometrical structure of wires grown with different orientation Finally the comparison of the optical spectra of SiNWs and GeNWs with diameters of the order of 0.8 nm, demonstrates that...

Ngày tải lên: 16/03/2014, 15:33

... Magneto -optical properties of magnetic multilayers 2.2.1 Magneto -optical properties of Co/Pd systems 2.2.2 Magneto -optical properties of Co/Pt multilayers 2.2.3 Magneto -optical properties of Co/Cu ... physical properties of layered structures including the MO properties Chapter of the book presents the MO properties of f band ferromagnetic materials Sections 3.1 devoted to the MO properties of 4f ... AND MAGNETO -OPTICAL PROPERTIES OF SOLIDS TLFeBOOK This page intentionally left blank TLFeBOOK Electronic Structure and Magneto -Optical Properties of Solids by Victor Antonov Institute of Metal Physics,...

Ngày tải lên: 17/03/2014, 14:51

... COMMUNICATIONS Comparing the intensities of the (010) and (014) peaks of the sample with those of the bulk W18O49, it was found that the relative intensity of (010) has been dramatically increased ... reaction temperature of 250 °C (Figure 3a).19 Longer nanorods of 130 ( 30 nm in length (aspect ratio ≈ 20) were prepared at 270 °C by using 12 equiv of oleylamine instead of 16 equiv (Figure 3b).19 ... the intensity of this peak increases relative to that of UV emission as the length of nanorods increases A similar PL pattern with two emission maxima, yet at much lower energies of 2.8 and 2.3...

Ngày tải lên: 20/03/2014, 13:08

Ngày tải lên: 22/03/2014, 11:20

... 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 ... at very low frequencies the optical properties of semiconductors exhibit a metal-like behavior, while at very high frequencies their optical properties are like those of insulators A characteristic ... Fundamentals of Semiconductors, Chapter • Wolfe, Holonyak and Stillman, Physical Properties of Semiconductors, Chapter 5.1 The Absorption Coefficient Measurement of the absorption of light is one of the...

Ngày tải lên: 24/04/2014, 17:13

... 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 ... spectra, respectively And the optical constants of the BFO thin film are obtained The bandgap of 2.68 eV for the BFO thin film is also received and is compared to that for BFO thin film deposited on ... structure, we should firstly obtain the optical response of the STO substrate and SRO buffer layer and then research the optical properties of the BFO thin film The ellipsometric spectra (Ψ and...

Ngày tải lên: 06/05/2014, 09:01

... large scale, and all of the nanorods have diameters of about 50 nm and lengths of 300 nm Fig (i–k) exhibits the FESEM images of nanoparticle-decorated ZnO pigment The surface of ZnO pigment was ... studies of multiple-scattering effects were carried out for randomly rough surfaces characterized by rms heights of the order of 5–10 nm, and transverse correlation lengths of the order of 100 ... the scattering properties of ice particles [33] The higher surface roughness of nanoparticle-decorated ZnO led to multiple scattering and increasing of the reflectance Presence of nanoparticles...

Ngày tải lên: 06/05/2014, 13:23

... the well-crystallized particles of prepared ZnO Fig 1b shows the UV–visible optical absorption characteristics of the sea urchin-like ZnO Excitonic absorption peak of the ZnO sample is at about ... analysis results of Fig 2d For analyzing the photoelectric properties of the sea urchin-like ZnO nanostructures, simple battery devices were fabricated Fig shows the I–V curve of the sea urchin-like ... (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 (d) and SAED pattern (e) of the sea urchin-like...

Ngày tải lên: 06/05/2014, 13:23

Ngày tải lên: 13/05/2014, 09:07

... metal thickness and the study of optical properties of metal coated microspheres), the optical properties of metamaterials made with stacked hole arrays and the guiding of metallic waveguides (and ... the seed and the feed of this thesis It is a long list of collaborators working in the groups of Prof T.W Ebbesen, Prof S.I Bozhevolnyi, Prof D Bäuerle, Prof J.R Kreen, Prof A Dereux and A.V Kats ... ‘‘meta-materials’’ because their optical response may be different than the optical response of its bulk components In this chapter we investigate the optical response of one of these metamaterials presenting...

Ngày tải lên: 29/05/2014, 18:40

... the reduction potential of Ag (0.8 V) is smaller that the reduction potential of Au (1.5 V), the velocity of reduction of Au ions is faster than the velocity of reduction of Ag ions So, an increasing ... reduction of HAuCl4 does not permit a complete dissolution of silver salts and therefore reduction of Ag+ ions due to spontaneous formation of AgCl(s) Considering the solubility product (Kps) of AgCl(s) ... Structure of Bimetallic Nanoparticles”, Physical Review Letters, Vol 92, P 196102, 2004 [5] R Kubo, “Electronic Properties of Metallic Fine Particles I”, Journal of Physical Society of Japan,...

Ngày tải lên: 04/06/2014, 15:20

... physical properties of ZnO nanostructures [19] The irradiation changes the amount of defects in ZnO nanorods resulting in changes in the optical properties of ZnO The effect of the ion irradiation of ... 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 optical properties of ZnO nanorods ... Influence of helium-ion bombardment on the optical properties of ZnO nanorods/p-GaN light-emitting diodes N H Alvi*1, S Hussain1, J Jensen2, O Nur1, and M Willander1 Department of Science and...

Ngày tải lên: 18/06/2014, 22:20