Effect of carrier screening on InGaAs MSM detector

Hongen Shen; Keith Aliberti; Gerard Dang; Michael Wraback

doi:10.1117/12.480857

25 July 2003 Effect of carrier screening on InGaAs MSM detector

Hongen Shen, Keith Aliberti, Gerard Dang, Michael Wraback

Proceedings Volume 4986, Physics and Simulation of Optoelectronic Devices XI; (2003) https://doi.org/10.1117/12.480857
Event: Integrated Optoelectronics Devices, 2003, San Jose, CA, United States

Abstract

We report on temporal response measurements of InGaAs metal-semiconductor-metal photodetectors (MSM-PDs) under high-illumination conditions. The peak current efficiency of the MSM-PDs decreases as the optical pulse energy increases due to space-charge-screening effects. The screening effects begin to occur at an optical pulse energy as low as 1.0 pJ/pulse, as predicted by a recent two-dimensional model. The fall time and full width at half maximum of the impulse response increase as the optical pulse energy increases and decrease as the bias voltage increases. For optical pulse energies between 1.0 pJ and 100 pJ, the rise time displays a U-shaped behavior as the bias voltage increases. This may be associated with the shape of the electron velocity-field characteristic in conjunction with screening of the dark field by optically generated carriers.

Citation Download Citation

Hongen Shen, Keith Aliberti, Gerard Dang, and Michael Wraback "Effect of carrier screening on InGaAs MSM detector", Proc. SPIE 4986, Physics and Simulation of Optoelectronic Devices XI, (25 July 2003); https://doi.org/10.1117/12.480857

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