Title :
Numerical analysis and design of a new traveling-wave photodetector with an asymmetric i-layer cross section
Author :
Kong, Soon-Cheol ; Ok, Seong-Hae ; Choi, Young-Wan ; Choe, Joong-Seon ; Kwon, Yong-Hwan ; Kim, Je-Ha
Author_Institution :
Central R&D Inst., Suwon, South Korea
Abstract :
We propose a new type of the traveling-wave photodetector (TWPD) that has an asymmetric intrinsic layer cross section to enhance bandwidth. In this paper, analysis and design of TWPDs are presented using the finite-difference time-domain method. A full-wave analysis is performed by a numerical technique and impulse responses are obtained in a linear regime. The simulation and experiment results show that 3-dB bandwidth is increased by the difference between electron and hole saturation velocities.
Keywords :
Maxwell equations; coplanar waveguides; finite difference time-domain analysis; microwave photonics; photodetectors; transient response; Maxwell´s curl equations; asymmetric intrinsic layer cross section; carrier transit time; electron saturation velocities; enhanced bandwidth; finite-difference time-domain method; full-wave analysis; hole saturation velocities; impulse responses; linear regime; microwave loss; multilayered structure; optical field distribution; ridge-type coplanar waveguide; traveling-wave photodetector; velocity mismatch; Bandwidth; Charge carrier processes; Coplanar waveguides; Finite difference methods; Microwave devices; Numerical analysis; Performance analysis; Photodetectors; Time domain analysis; Wireless communication;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2003.818850
