A Detailed Investigation of UTC Traveling Wave Photodetectors

Author

Pasalic, Damir ; Vahldieck, Rudiger

Author_Institution

Lab. for Electromagn. Fields & Microwave Electron., Swiss Fed. Inst. of Technol., Zurich

fYear

2006

fDate

11-16 June 2006

Firstpage

2

Lastpage

5

Abstract

Effects of the absorber´s thickness on the UTC TWPD´s performance are investigated. This is an important parameter because it affects both external efficiency and the bandwidth of the device. The analysis of the photodetectors is done using a hybrid drift-diffusion-TLM method, which takes into consideration both, carrier dynamics and RF propagation characteristics. To improve the external efficiency of the UTC TWPD, a thicker absorber is needed. However, a thicker absorber also reduces the transit bandwidth of the photodetector. It is found that the bandwidth of a high frequency UTC TWPD with a thick absorber can be improved by optimizing the length of the device

Keywords

photodetectors; photodiodes; transmission line matrix methods; RF propagation characteristics; TLM method; UTC photodiodes; carrier dynamics; drift-diffusion method; traveling wave photodetectors; Bandwidth; Electrons; Millimeter wave measurements; Optical mixing; Optical saturation; Optical waveguide theory; Optical waveguides; Photodetectors; Photodiodes; Radio frequency; Drift diffusion method; TLM method; Traveling wave photodetectors; UTC photodiodes;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2006. IEEE MTT-S International

Conference_Location

San Francisco, CA

ISSN

0149-645X

Print_ISBN

0-7803-9541-7

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2006.249893

Filename

4014802