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  • 1985-1989  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Monitoring humidity by polyimide lightguides (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 778-779 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Planar waveguides of the commercially available polyimide "PI 2566'' and polyamide-imide "AI lite'' are spin coated on glass substrates. TE and TM polarized modes are launched simultaneously into the phase-matched planar lightguide. This polymer guide is sensitive to changes in its birefringence. Polyimide films in the "as-dried'' and fast cured state turn out to be very sensitive to moisture. Changes in the vicinity of the waveguide can be monitored instantly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99281
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    Paper (German National Licenses)
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  • 2
    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)
    Fulltext
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