Dynamics of electric field screening in a bulk GaAs modulator | Zendy

H. Heesel | Zendy; S. Hunsche | Zendy; H. Mikkelsen | Zendy; T. Dekorsy | Zendy; Karl Leo | Zendy; H. Kurz | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Dynamics of electric field screening in a bulk GaAs modulator

Author(s) -

H. Heesel,

S. Hunsche,

H. Mikkelsen,

T. Dekorsy,

Karl Leo,

H. Kurz

Publication year - 1993

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.47.16000

Subject(s) - electric field , physics , excitation , field (mathematics) , dielectric , transient (computer programming) , diffusion , coupling (piping) , condensed matter physics , materials science , modulation (music) , atomic physics , optoelectronics , quantum mechanics , mathematics , computer science , acoustics , pure mathematics , metallurgy , operating system

The transient development of electric-field distributions in a biased GaAs film after low-density optical excitation is determined by measurements of Franz-Keldysh modulations with a time resolution of 100 fs. The experimental results are compared with theoretical calculations. The transient field is calculated with a drift-diffusion model. Our calculation of the dielectric function of GaAs includes the Coulomb coupling and the electric field. The resulting optical transmission changes are calculated with a transfer-matrix method. The theory predicts a modification of the Franz-Keldysh modulation due to the nonuniform field, in quantitative agreement with the experimental observations.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research