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arXiv · 1910.01664

Demonstration of a Tunable Antenna-Coupled Intersubband Terahertz (TACIT) Mixer

Changyun Yoo·Mengchen Huang·Jonathan Kawamura·Kenneth West·Loren Pfeiffer·Boris Karasik·Mark Sherwin
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Abstract

A fast, voltage-tunable terahertz mixer based on the intersubband transition of a high-mobility 2-dimensional electron gas (2DEG) has been fabricated from a single 40 nm GaAs-AlGaAs square quantum well heterostructure. The device is called a Tunable Antenna-Coupled Intersubband Terahertz (TACIT) mixer, and shows tunability of the detection frequency from 2.52 THz to 3.11 THz with small (< 1 V) top gate and back gate voltage biases. Mixing at 2.52 THz has been observed at 60 K with a -3dB intermediate frequency (IF) bandwidth exceeding 6 GHz.

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Changyun Yoo, Mengchen Huang, Jonathan Kawamura, Kenneth West, Loren Pfeiffer, Boris Karasik, Mark Sherwin. 2019-10-03. Demonstration of a Tunable Antenna-Coupled Intersubband Terahertz (TACIT) Mixer. https://doi.org/10.1063/1.5129801

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