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Terahertz Resonant Detection by Plasma Waves in Nanometric Transistors

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Teppe F., El Fatimy A., Boubanga S., Knap W., Seliuta D., Valusis G., Chenaud B.

Acta Physica Polonica A

2008

vol. 113

issue 3

815-820

The plasma waves in gated two-dimensional electron gas have a linear dispersion law, similar to the sound waves. The transistor channel is acting as a resonator cavity for the plasma waves, which can reach frequencies in the THz range for a sufficiently short gate length field effect transistors. A variety of possible applications of field effect transistor operating as a THz device were suggested. In particular, it was shown that the nonlinear properties of plasma oscillations can be utilized for THz tunable detectors. During the last few years THz detection related to plasma wave instabilities in nanometer size field effect transistors was demonstrated experimentally. In this work we review our recent experimental results on the resonant plasma wave detection at cryogenic and room temperatures.

Mechanism of Radiation Coupling to Plasma Wave Field Effect Transistor Sub-THz Detectors

100%

Sakowicz M., Łusakowski J., Karpierz K., Grynberg M., Gwarek W., Knap W., Boubanga S.

Acta Physica Polonica A

2008

vol. 114

issue 5

1337-1342

Detection of 100 GHz and 285 GHz electromagnetic radiation by GaAs/AlGaAs field effect transistors with the gate length of 150 nm was investigated at 300 K as a function of the angleαbetween the direction of linear polarization of the radiation and the symmetry axis of the field effect transistors. The angular dependence of the detected signal was found to be Acos²(α-α₀)+C. A response of the transistor chip (including bonding wires and the substrate) to the radiation was numerically simulated. Calculations confirmed experimentally observed dependences and allowed to investigate the role of bonding wires and contact pads in coupling of the radiation to the transistor channel.

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2 Acta Physica Polonica A

2 2008

2 Boubanga S.

2 Knap W.

1 Chenaud B.

1 El Fatimy A.

1 Grynberg M.

1 Gwarek W.

1 Karpierz K.

1 Sakowicz M.

1 Seliuta D.

1 Teppe F.

1 Valusis G.

1 Łusakowski J.

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Terahertz Resonant Detection by Plasma Waves in Nanometric Transistors

Mechanism of Radiation Coupling to Plasma Wave Field Effect Transistor Sub-THz Detectors