Crosstalk analysis for mesa-based in-device passivated InGaAs photodetectors

Kubra Circir; Serdar Kocaman

doi:10.1117/12.2609730

4 March 2022 Crosstalk analysis for mesa-based in-device passivated InGaAs photodetectors

Kubra Circir, Serdar Kocaman

Proceedings Volume 11997, Optical Components and Materials XIX; 119970A (2022) https://doi.org/10.1117/12.2609730
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Electrical crosstalk of in-device passivated mesa-based InGaAs photodetectors has been analyzed by a three-pixel mini array illuminated from the backside. In-device passivation of mesa-based lattice-matched InGaAs photodetectors significantly suppresses the surface-related component of dark current—however, inter-pixel crosstalk increases due to the depletion condition of the in-device passivation layer between the pixels. The inter-pixel crosstalk originates mainly from the high electric field in the in-device passivation layer. Here, in mesa-based in-device passivated InGaAs photodetectors, inter-pixel crosstalk has been significantly improved by adjusting the electric field distribution between the pixels with the inclusion of a thin n-InP crosstalk-block layer without affecting the primary purpose of the detector structure, which is strong resistivity to surface-related dark current increase.

Conference Presentation

Citation Download Citation

Kubra Circir and Serdar Kocaman "Crosstalk analysis for mesa-based in-device passivated InGaAs photodetectors", Proc. SPIE 11997, Optical Components and Materials XIX, 119970A (4 March 2022); https://doi.org/10.1117/12.2609730

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