Title :
An analytical small-signal model for submicrometer n+-i-n+ traveling-wave photodetectors
Author :
Torrese, Guido ; Huynen, Isabelle ; Vorst, Andr Vander
Author_Institution :
Service d´´Electromagnetisme et de Telecommun., Faculte Polytechnique de Mons, Belgium
Abstract :
A fully analytical small-signal model for investigating the frequency response of submicrometer n+-i-n+ traveling-wave photodetectors is derived. In order to properly account for nonstationary nonlocal phenomena characterizing submicrometer devices, the simple diffusive description of the carrier drift flux in a local driving field discussed by Torrese et al. in 2002 has been replaced by the hydrodynamic approach. The influence of the bias voltage on the transit time, as well as the bandwidth limitation due to the electrical wave reflections at both input and output ends of the detector are discussed.
Keywords :
frequency response; photodetectors; analytical small-signal model; bandwidth limitation; bias voltage; carrier drift flux; electrical wave reflections; frequency response; hydrodynamic approach; local driving field; nonstationary nonlocal phenomena; submicrometer n+-i-n+ traveling-wave photodetectors; transit time; Analytical models; Bandwidth; Degradation; Gallium arsenide; Hydrodynamics; Optical reflection; P-i-n diodes; PIN photodiodes; Photodetectors; Voltage; Bandwidth; semiconductor device; traveling-wave photodetector (TWPD);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2005.855137
