Investigating nonlinear transport effects in GaAs using electro-optic probing

Khalid A. Murad Ali; Anthony J. Vickers

doi:10.1117/12.391456

14 July 2000 Investigating nonlinear transport effects in GaAs using electro-optic probing

Khalid A. Murad Ali, Anthony J. Vickers

Proceedings Volume 3944, Physics and Simulation of Optoelectronic Devices VIII; (2000) https://doi.org/10.1117/12.391456
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

We have studied the potential profile of gateless MESFET devices using electro-optic probing. We have used smooth samples as previous work has shown how rough devices produce excessive noise generated from the Fabry-Perot effect. The profiles measured show non-linear behavior at low fields but high duty cycles. These non-linearities were more noticeable at the edges of the devices and we believe they are associated with device heating which would be prominent at the edges due to 'edge effect.' To remove this effect we have used very low duty cycles and the resulting potential profiles are as expected. Using low duty cycles and applying high electric fields allows us to study non-linear transport behavior in these devices. The samples were designed to exhibit non-linear behavior due to the Gunn Effect. At high applied electric fields the current saturates and becomes noisy, indicative of non-linear behavior. We show the first reported device field profiles under these conditions measured using electro-optic probing. The observed non-linear behavior can be explained in terms of the Gunn Effect.

Citation Download Citation

Khalid A. Murad Ali and Anthony J. Vickers "Investigating nonlinear transport effects in GaAs using electro-optic probing", Proc. SPIE 3944, Physics and Simulation of Optoelectronic Devices VIII, (14 July 2000); https://doi.org/10.1117/12.391456

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KEYWORDS

Gallium arsenide

Electro optics

Astatine

Field effect transistors

Beam splitters

Crystals

Fabry–Perot interferometers

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