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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/597

Title: Gallium arsenide photo-MESFET's
Authors: LAKSHMI, B
CHALAPATI, K
SRIVASTAVA, AK
ARORA, BM
SUBRAMANIAN, S
SHARMA, DK
Keywords: iii-v semiconductors
schottky gate field effect transistors
gallium arsenide
phototransistors
Issue Date: 1990
Publisher: IEEE
Citation: IEEE Transactions on Electron Devices 37 (6 part 1), 1533-1535
Abstract: Photodetection response measurements performed on normally off GaAs photo-MESFETs are discussed. Two modes were investigated: (i) the normal mode in which the photon energy is greater than the bandgap and the light intensity is sufficient to bias the device above turn-on-threshold, and (ii) the subthreshold mode with subband-gap photon energy illumination. In the second mode, the transistor operates by internal photoemission from the metal gate to the semiconductor. In the normal mode, the square root of the drain photocurrent varies as the logarithm of the incident light intensity. The device characteristics for subband-gap illumination have been analyzed, and it is shown that the photocurrent varies linearly with light intensity in this mode.
URI: http://dx.doi.org/10.1109/16.106251
http://hdl.handle.net/10054/597
http://dspace.library.iitb.ac.in/xmlui/handle/10054/597
ISSN: 0018-9383
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