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  • 1995-1999  (191.292)
  • Physik  (191.292)
Medientyp
Sprache
Erscheinungszeitraum
  • 1995-1999  (191.292)
Jahr
Fachgebiete(RVK)
RVK
  • 1
    Online-Ressource
    Online-Ressource
    IOP Publishing ; 1995
    In:  Japanese Journal of Applied Physics Vol. 34, No. 5B ( 1995-05-01), p. L621-
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 34, No. 5B ( 1995-05-01), p. L621-
    Kurzfassung: An electroluminescent diode with periodic multilayer structure consisting of alternating layers of 8-hydroxyquinoline aluminum and aromatic diamine has been fabricated by organic molecular beam deposition. Polarization anisotropy of emission spectrum and intensity of light propagating in the diode organic layer have been observed. The mechanism of the emission anisotropy has been discussed in the periodic multilayer structure.
    Materialart: Online-Ressource
    ISSN: 0021-4922 , 1347-4065
    RVK:
    RVK:
    RVK:
    Sprache: Unbekannt
    Verlag: IOP Publishing
    Publikationsdatum: 1995
    ZDB Id: 218223-3
    ZDB Id: 797294-5
    ZDB Id: 2006801-3
    ZDB Id: 797295-7
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  • 2
    Online-Ressource
    Online-Ressource
    IOP Publishing ; 1995
    In:  Japanese Journal of Applied Physics Vol. 34, No. 7R ( 1995-07-01), p. 3666-
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 34, No. 7R ( 1995-07-01), p. 3666-
    Kurzfassung: Auger electron spectroscopy (AES) depth profiles of the interfacial SiO 2 and SiO 2 /Si 3 N 4 layers formed between Ta 2 O 5 film and Si substrate were quantitatively analyzed and the accuracy of the AES analysis was confirmed using a high-resolution cross-sectional transmission electron microscopy (TEM). It has been shown that the AES depth profiling technique is a convenient method for quantitative analysis of the ultrathin interfacial layers, enabling discrimination of the amorphous layers, SiO 2 /Si 3 N 4 .
    Materialart: Online-Ressource
    ISSN: 0021-4922 , 1347-4065
    RVK:
    RVK:
    RVK:
    Sprache: Unbekannt
    Verlag: IOP Publishing
    Publikationsdatum: 1995
    ZDB Id: 218223-3
    ZDB Id: 797294-5
    ZDB Id: 2006801-3
    ZDB Id: 797295-7
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  • 3
    Online-Ressource
    Online-Ressource
    IOP Publishing ; 1995
    In:  Japanese Journal of Applied Physics Vol. 34, No. 9R ( 1995-09-01), p. 4666-
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 34, No. 9R ( 1995-09-01), p. 4666-
    Kurzfassung: Usually, semi-insulating polycrystalline silicon films SiO x are obtained from the chemical decomposition of silane and nitrous oxide. In this paper we describe the study of semi-insulating polycrystalline silicon (SIPOS) films from disilane and nitrous oxide by low pressure chemical vapour deposition. The kinetics of growth and the variation of oxygen content have been investigated relatively to deposition parameters such as temperature, total pressure and gas flow ratio. The oxygen content is assessed by X-ray photoelectron spectroscopy (XPS) and by differential thickness method. We show that the growth rate is higher for “disilane SIPOS films” than “silane SIPOS films” and we explain this behaviour by the strong difference in growth rate of silylene species. We also show that the inhibition effect of nitrous oxide on the growth rate is very low in the case of SIPOS films obtained with disilane. The electrical resistivity depends on the oxygen content and is ranged between 10 9 and 10 13 Ω· cm.
    Materialart: Online-Ressource
    ISSN: 0021-4922 , 1347-4065
    RVK:
    RVK:
    RVK:
    Sprache: Unbekannt
    Verlag: IOP Publishing
    Publikationsdatum: 1995
    ZDB Id: 218223-3
    ZDB Id: 797294-5
    ZDB Id: 2006801-3
    ZDB Id: 797295-7
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  • 4
    Online-Ressource
    Online-Ressource
    IOP Publishing ; 1995
    In:  Japanese Journal of Applied Physics Vol. 34, No. 10R ( 1995-10-01), p. 5758-
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 34, No. 10R ( 1995-10-01), p. 5758-
    Kurzfassung: Cubic boron nitride (c-BN) films have been produced by ion-beam-assisted deposition in which a mixed argon and nitrogen ion beam was irradiated on Si (100) substrates during boron evaporation. Ion species and ion concentrations were measured by mass spectroscopy and optical emission spectroscopy methods. Cubic-BN phase formation was significantly enhanced in a restricted range of Ar + ion concentration of around 30% in the mixed ion beam. At an ion energy range from 0.75 to 1.0 keV, a considerable enhancement was observed with a gas flow ratio of Ar/N 2 =1/5, which corresponded to a relative Ar + ion concentration of 30%. However, at a gas flow ratio of Ar/N 2 =1/3, which corresponded to the relative Ar + ion concentration of 50%, no film deposition was observed at 0.75-1.0 keV due to the sputtering effect. It was suggested that the ion bombardment effect on the film crystalline structure is controlled by ion current density, ion mixing ratio and ion energy.
    Materialart: Online-Ressource
    ISSN: 0021-4922 , 1347-4065
    RVK:
    RVK:
    RVK:
    Sprache: Unbekannt
    Verlag: IOP Publishing
    Publikationsdatum: 1995
    ZDB Id: 218223-3
    ZDB Id: 797294-5
    ZDB Id: 2006801-3
    ZDB Id: 797295-7
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Online-Ressource
    Online-Ressource
    IOP Publishing ; 1998
    In:  Japanese Journal of Applied Physics Vol. 37, No. 9R ( 1998-09-01), p. 5016-
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 37, No. 9R ( 1998-09-01), p. 5016-
    Kurzfassung: A model of dark discharge in the atmosphere before a large earthquake was proposed to elucidate the mechanism of generation of earthquake lightning and related electroatmospheric phenomena. Change in seismic stress releases piezo-compensating, bound charges due to changes in the piezoelectric polarization of quartz grains in granitic rocks, which produces an intense electric field at the fault zone. The excited or ionized molecules by free electrons accelerated under the electric field produce luminous phenomena in the atmosphere. Both Maxwell and Druyvesteyn distributions of the electron energy under the induced electric field were considered to estimate the rate of ionization and excitation of N 2 and O 2 molecules. An electric field and spatial distribution of earthquake lightning (EQL) were calculated based on the induced charges in the piezoelectric process which accompanies an earthquake. The intensity of emission from the excitation state, B 3 Π g of N 2 molecule was estimated at 3×10 20 photons/m 3 close to the fault zone. A nucleus of precipitation might also be formed in a supercooled atmosphere leading to the appearance of earthquake fog and clouds.
    Materialart: Online-Ressource
    ISSN: 0021-4922 , 1347-4065
    RVK:
    RVK:
    RVK:
    Sprache: Unbekannt
    Verlag: IOP Publishing
    Publikationsdatum: 1998
    ZDB Id: 218223-3
    ZDB Id: 797294-5
    ZDB Id: 2006801-3
    ZDB Id: 797295-7
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  • 6
    Online-Ressource
    Online-Ressource
    IOP Publishing ; 1998
    In:  Japanese Journal of Applied Physics Vol. 37, No. 10R ( 1998-10-01), p. 5588-
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 37, No. 10R ( 1998-10-01), p. 5588-
    Kurzfassung: An electro-optic intensity modulator consisting of a waveguide structure was fabricated using a novel urethane-urea copolymer that exhibited high second-order optical nonlinearity and superior temporal stability. Single-mode waveguides were defined by a photobleaching process, and then the electro-optic effect of the polymer was induced by corona poling. The intensity modulation for a propagation light at 830 nm was observed when AC voltage was applied. A half-wave voltage of V π =18 V was measured at 1 kHz using a modulator that had a 13-mm-long electrode, and the electro-optic coefficient ( r 33 ) was estimated to be 12 pm/V. The birefringence of the poled polymer and the r 33 of the modulator depended on the poling voltage.
    Materialart: Online-Ressource
    ISSN: 0021-4922 , 1347-4065
    RVK:
    RVK:
    RVK:
    Sprache: Unbekannt
    Verlag: IOP Publishing
    Publikationsdatum: 1998
    ZDB Id: 218223-3
    ZDB Id: 797294-5
    ZDB Id: 2006801-3
    ZDB Id: 797295-7
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  • 7
    Online-Ressource
    Online-Ressource
    IOP Publishing ; 1997
    In:  Japanese Journal of Applied Physics Vol. 36, No. 12R ( 1997-12-01), p. 7379-
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 36, No. 12R ( 1997-12-01), p. 7379-
    Kurzfassung: The Faraday rotation spectra were observed at 810.4 nm of the 5 s 12 –5 p 22 transition in atomic krypton using a single mode diode laser. The lineshapes at the resonance were changed largely with laser intensity. At a low laser intensity the lineshape is a normal form of the differential of a dispersion curve. As the laser intensity increases, a Gaussian curve appears, overlapping the normal curve. At a sufficiently high laser intensity, the Gaussian component dominates the latter. The spectral change is ascribed to the development of optical and Zeeman coherence.
    Materialart: Online-Ressource
    ISSN: 0021-4922 , 1347-4065
    RVK:
    RVK:
    RVK:
    Sprache: Unbekannt
    Verlag: IOP Publishing
    Publikationsdatum: 1997
    ZDB Id: 218223-3
    ZDB Id: 797294-5
    ZDB Id: 2006801-3
    ZDB Id: 797295-7
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  • 8
    Online-Ressource
    Online-Ressource
    IOP Publishing ; 1995
    In:  Japanese Journal of Applied Physics Vol. 34, No. 1R ( 1995-01-01), p. 20-
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 34, No. 1R ( 1995-01-01), p. 20-
    Kurzfassung: Lateral solid-phase epitaxy (LSPE) characteristics of Ge-incorporated amorphous Si films which are deposited on SiO 2 /Si (100) structures with [010] seed openings are investigated. It has been found in P-doped amorphous Si films that the LSPE growth rate at 600° C is enhanced about sixfold by incorporation of 0.5 at.% Ge atoms, and that the maximum growth length is about 21 µ m. It has also been found that the growth in the film with 1 at.% Ge atoms stops for a few hours upon annealing at temperatures lower than 600° C at a length of about 2 µ m from the seed edge and it proceeds again as annealing time is extended. To clarify the origin of the anomalous growth rate, the residual stress in the films has been measured using microprobe Raman spectrometry, and it is concluded that the origin of the enhanced growth is the residual stress in the films. Finally, it is suggested that the Ge-incorporated stress effect may be explained by the critical thickness theory in pseudomorphic growth of Si 1- x Ge x films on Si substrates.
    Materialart: Online-Ressource
    ISSN: 0021-4922 , 1347-4065
    RVK:
    RVK:
    RVK:
    Sprache: Unbekannt
    Verlag: IOP Publishing
    Publikationsdatum: 1995
    ZDB Id: 218223-3
    ZDB Id: 797294-5
    ZDB Id: 2006801-3
    ZDB Id: 797295-7
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 9
    Online-Ressource
    Online-Ressource
    IOP Publishing ; 1995
    In:  Japanese Journal of Applied Physics Vol. 34, No. 1R ( 1995-01-01), p. 151-
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 34, No. 1R ( 1995-01-01), p. 151-
    Kurzfassung: A GaAs/GaAlAs-system TE/TM mode splitter using the mode interference principle is described. Single- and double-mode waveguides are patterned by reactive ion etching after the first molecular beam epitaxy. They are then completely buried by liquid-phase epitaxy, which enables low loss propagation due to side-wall smoothness, because of the thermal deformation effect. For achieving low loss characteristics in this mode splitter, the surface treatment process before crystal growth and S-bend waveguide mask formation procedure are also optimized. Propagation loss of the single-mode waveguide is less than 1.0 dB/cm. In order to secure birefringence of the waveguide for mode splitting, upper and lower GaAlAs-cladding mol fractions are different. Finally, the fabricated device achieves the TE/TM mode splitting ratio of 8.2 dB for both polarizations.
    Materialart: Online-Ressource
    ISSN: 0021-4922 , 1347-4065
    RVK:
    RVK:
    RVK:
    Sprache: Unbekannt
    Verlag: IOP Publishing
    Publikationsdatum: 1995
    ZDB Id: 218223-3
    ZDB Id: 797294-5
    ZDB Id: 2006801-3
    ZDB Id: 797295-7
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 10
    Online-Ressource
    Online-Ressource
    IOP Publishing ; 1995
    In:  Japanese Journal of Applied Physics Vol. 34, No. 11A ( 1995-11-01), p. L1445-
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 34, No. 11A ( 1995-11-01), p. L1445-
    Kurzfassung: We propose a new optical memory structure using self-assembled InAs quantum dots (QDs) for possible applications to wavelength-domain-multiplication memory, which should lead to increase memory density. Data stored in this memory structure can be read using photocurrent and then erased electrically. In a preliminary study, we confirmed the memory effect of photocurrent caused by the InAs QDs for the first time. A retention time of 0.48 ms for the memory was obtained at 300 K.
    Materialart: Online-Ressource
    ISSN: 0021-4922 , 1347-4065
    RVK:
    RVK:
    RVK:
    Sprache: Unbekannt
    Verlag: IOP Publishing
    Publikationsdatum: 1995
    ZDB Id: 218223-3
    ZDB Id: 797294-5
    ZDB Id: 2006801-3
    ZDB Id: 797295-7
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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