Spectral response modelling of heterojunction phototransistors for short wavelength transmission

Hassan A. Khan, Ali A. Rezazadeh, Suba C. Subramaniam

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    An accurate spectral response model for phototransistors has been proposed. Themodel is based on the calculation of photogenerated carriers through absorption in base, collector and sub-collector regions of phototransistor. Absorption pattern in AlGaAs/GaAs heterojunction phototransistors has been analysed and discussed using theproposed model. Collection efficiency, being strictly a geometry and wavelength dependent parameter, is not considered unity unlike all the precedents and its importance is highlighted. With the aid of the absorption model, absolute responsivity of a phototransistor is predicted for the first time. Power absorption profile and quantumefficiency have also been modelled. The analysis is performed for short wavelength transmission and the measurements corroborate the simulated results.
    Original languageEnglish
    Title of host publication2008 European Microwave Integrated Circuit Conference, EuMIC 2008|Eur. Microw. Integr. Circuit Conf., EuMIC
    Place of PublicationIEEE Explore
    PublisherEuropean Microwave Association
    Pages346-349
    Number of pages3
    ISBN (Print)9782874870071
    DOIs
    Publication statusPublished - 2008
    Event2008 European Microwave Integrated Circuit Conference, EuMIC 2008 - Amsterdam
    Duration: 1 Jul 2008 → …

    Conference

    Conference2008 European Microwave Integrated Circuit Conference, EuMIC 2008
    CityAmsterdam
    Period1/07/08 → …

    Keywords

    • Optical Spectral response, Phototransistors, AlGaAs/GaAs heterojunction, short wavelength transmission

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