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  • 1
    Electronic Resource
    Electronic Resource
    An integrated organic photoconductive detector for optoelectronics (1989)
    Springer
    Applied physics 48 (1989), S. 219-224 
    Details
    ISSN: 1432-0649
    Keywords: 42.80 ; 42.82 ; 72.40
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In the system (poly-(N-vinyl carbazole) (PVK): trinitrofluorenone (TNF) a photoconductive complex is formed. Thin metal films are sputtered on BK7 glass substrates, forming two electrodes with 1 mm separation. The photoconductive complex is deposited from a solution in chlorobenzene/tetrahydrofurane on the glass substrate between the electrodes, forming a photoconductive detector. Photoconductivity of these planar detectors is studied using He-Ne laser light (λ=633 nm) as a function of electric field and for different TNF concentrations. An increase of photosensitivity is found for high TNF concentrations. Time resolution of the photoconductive PVK:TNF detector is investigated using a ruby pulse laser (λ=694 nm). The possible use of such detectors in combination with other polymer lightguides is demonstrated. Compared to most polymer waveguide materials PVK exhibits a rather high refractive index ofn=1.7. Thus the coupling of light into the photoconductive film is achieved directly. The planar structure allows further integration of polymeric components for optoelectronics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694348
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Elastooptic investigations in functional allyl polymer lightguides (1996)
    Springer
    Applied physics 63 (1996), S. 609-615 
    Details
    ISSN: 1432-0649
    Keywords: 42.79.h ; 42.79.P,Q ; 42.82 ; 71.29.Hk
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Planar waveguides of the allyl polymer poly-(terephthal acid diallyl ester) (PDATP) exhibiting a particular high stress optical coefficient are investigated. Internal mechanical stress may be introduced in the wave-guides by the in-diffusion of small vapour molecules or by the activation of a piezoelectric transducer in the substrate. Based on the induced stress the feasibility of gas sensors or electro acousto optic phase shifters (V π=180 V) with these waveguides is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01831001
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Compensation of temperature drift in leaky-mode spectra for sensor applications (1994)
    Springer
    Applied physics 58 (1994), S. 215-218 
    Details
    ISSN: 1432-0630
    Keywords: 42.82 ; 42.79
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Leaky-mode spectroscopy enhanced with semitransparent metal films may be effectively used for optical gas detection. Most of the optical sensors show a large temperature drift which is detrimental for application purposes. In this paper a model for the compensation of a particular line shift in the leaky-mode spectrum is given and it is confirmed experimentally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324378
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Thermo-optical investigation of clamped ferroelectric polymer films (1994)
    Springer
    Applied physics 58 (1994), S. 589-593 
    Details
    ISSN: 1432-0630
    Keywords: 78.66.Qn ; 42.82 ; 77.80 ; 65.70.+y
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Attenuated total reflection leaky-mode spectroscopy is used for a thermo-optical investigation of a clamped film of the ferroelectric vinylidene fluoridetrifluoroethylene copolymer. A hysteresis loop for the optical parameters refractive index and film thickness is found for a full temperature cycle between 25° C and 60° C. In the vicinity of the ferroelectric/paraelectric phase transition increased optical losses are found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00348170
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    Paper (German National Licenses)
    Fulltext
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