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Substrate diode effect on the performance of Silicon Germanium phototransistors

Tegegne, Zerihun Gedeb and Viana, Carlos and Rosales, Marc D. and Polleux, Jean-Luc and Algani, Catherine and Grzeskowiak, Marjorie and Richalot, Elodie Substrate diode effect on the performance of Silicon Germanium phototransistors. (2015) In: 2015 International Topical Meeting on Microwave Photonics (MWP), 26 October 2015 - 29 October 2015 (Paphos, Cyprus).

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Official URL: https://doi.org/10.1109/MWP.2015.7356678


This paper provides a study on the substrate effect on the opto-microwave behavior of Silicon-Germanium Heterojunction bipolar Photo-Transistors (HPT). An Opto-Microwave Scanning Near Field Optical Microscopy (OM-SNOM) is performed to observe the distribution of photocurrent and dynamic behavior over the structure of the phototransistor. The photocurrent generated in the photodiode created by a n++ sub-collector and p+ substrate is extracted and analyzed. A maximum substrate diode current of 700μA is observed at 850nm with a related cutoff frequency of 0.42GHz. We have extracted low frequency responsivity (at 50MHz) bandwidth product of 109.2 MHzA/W. Finally, this study will provide a design guide line for Si base phototransistors.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Thanks to the IEEE (Institute of Electrical and Electronics Engineers). This paper is available at : https://ieeexplore.ieee.org/document/7356678 “© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
HAL Id:hal-01708918
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Other partners > Conservatoire National des Arts et Métiers - CNAM (FRANCE)
Other partners > Ecole de l'Innovation Technologique - ESIEE PARIS (FRANCE)
Other partners > Université Paris-Est Marne-La-Vallée - UPEM (FRANCE)
Other partners > University of the Philippines (PHILIPPINES)
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Deposited On:29 Jul 2019 12:00

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