Przeglądaj {{ collection }} wg Autor "Gębski, Marcin"

Wpisz kilka pierwszych liter i kliknij przycisk przeglądania
Teraz wyświetlane 1 - 2 z 2
  • Pozycja
    Current dependence of resistances and capacitances in a vertical-cavity surface-emitting laser
    (Wydawnictwo Politechniki Łódzkiej, 2017) Komar, Paulina; Śpiewak, Patrycja; Gębski, Marcin; Lott, James A.; Wasiak, Michał
    Based on the model of impedance and modulation time constants for vertical-cavity surface-emitting lasers (VCSELs) we study the resistances and capacitances of an equivalent circuit as a function of the current flowing through the VCSEL. We observe reduction of some components of the resistance and the capacitance, as well as the modulation time constants for increasing current.
  • Pozycja
    Subwavelength high contrast gratings as optical sensing elements
    (Wydawnictwo Politechniki Łódzkiej, 2017) Marciniak, Magdalena; Gębski, Marcin; Dems, Maciej; Czyszanowski, Tomasz
    Subwavelength high contrast gratings (HCG) can be used as high reflective mirrors and can be used as mirrors of vertical-cavity surface-emitting lasers. HCG mirrors can be designed in such a way that they are extremely sensitive to environmental changes - changes in the refractive index of ambient substance or changes in the absorption coefficient may cause changes in mirror reflectivity. This phenomenon can be used to detect liquids and gases. In this paper we present analysis of HCG properties. We consider the various HCG mirror designs and the possibilities of detecting gases and liquids.