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Please use this identifier to cite or link to this item: http://hdl.handle.net/1860/1139

Title: Optically modulated high-sensitivity heterostructure varactor
Authors: Zhao, Xia
Cola, Adriano
Tersigni, Andrea
Quaranta, Fabio
Gallo, Eric
Spanier, Jonathan E.
Nabet, Bahram
Keywords: Frequency Multiplier;Heterostructure-Barrier-Varactor (HBV);Metal–Semiconductor–Metal (MSM);Optical Modulation;Two-Dimensional-Hole-Gas (2-DHG)
Issue Date: Sep-2006
Publisher: Institute of Electrical and Electronics Engineers
Citation: IEEE Electron Device Letters, 27(9): pp. 710-712.
Abstract: A novel optically modulated high-sensitivity heterostructure varactor, demonstrated as a strong candidate for high-order frequency-multiplier applications, is reported. The device is a δ modulation-doped heterostructure of AlGaAs/GaAs with two Schottky contacts on the top. The capacitance–voltage (C–V ) measurements show a Cmax/Cmin ratio up to 113 and an extremely high nonlinearity during the transition from high to low capacitance with sensitivity of up to 35. These results are one of the best obtained so far among similar structure devices. In addition, optoelectronic experimental results demonstrate that the slope of the C–V relationship can be modulated by the intensity of the incident optical power. A model describing the source of the reported C–V results is proposed along with the simulation results verifying the observed C–V behavior.
URI: http://hdl.handle.net/1860/1139
Appears in Collections:Faculty Research and Publications (ECE)

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