Sub-THz Imaging Using Non-Resonant HEMT Detectors

Sub-THz Imaging Using Non-Resonant HEMT Detectors

Plasma waves in gated 2-D systems can be used to efficiently detect THz electromagnetic radiation. Solid-state plasma wave-based sensors can be used as detectors in THz imaging systems. An experimental study of the sub-THz response of II-gate strained-Si Schottky-gated MODFETs (Modulation-doped Field-Effect Transistor) was performed. The response of the strained-Si MODFET has been characterized...

Resonant metamaterial detectors based on THz quantum-cascade structures

We present the design, fabrication and characterisation of an intersubband detector employing a resonant metamaterial coupling structure. The semiconductor heterostructure relies on a conventional THz quantum-cascade laser design and is operated at zero bias for the detector operation. The same active region can be used to generate or detect light depending on the bias conditions and the vertic...

Fabrication of Sub-THz Oscillators Using Resonant Tunneling Diodes Integrated with Slot Antennas

We fabricated sub-THz oscillators using resonant tunneling diodes integrated with slot antennas. Oscillations at 90GHz and 136GHz were obtained for the slot antennas with the lengths of 1mm and 800μm. Theoretical calculation shows that the maximum oscillation frequency up to ~1.2THz is expected in this structure with short antenna.

Generation of THz Pulse by PANDA Ring for THz Imaging

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THz resonant-tunneling diodes