ED2012-106 High Frequency Performance of GaAsSb/InGaAs Tunnel Diodes

概要

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Increasing interest to high-resolution active and passive MMW-THz imaging and high-speed wireless data communications motivates development of novel devices and systems operating beyond 100 GHz. Among various detector technologies, zero-bias heterostructure tunnel diodes based on III-V compound semiconductors have promising characteristics, such as reduced 1/f noise, higher operational frequencies due to small device capacitances, and feasibility of monolithic integration of the detectors with low noise amplifier (LNA) circuits. We evaluated performance of InP-based, zero-bias, square-law GaAsSb/InAlAs/InGaAs tunnel diodes for direct detection at frequencies up to 330 GHz. The detectors with submicron cross-sectional area demonstrated sensitivities above 500 V/W. Optimization of the device structure can improve the sensitivity and the cut-off frequency.
2012-12-10