Abstract
We are developing a novel THz hot-electron bolometer (HEB) mixer based on a high-mobility 2-dimensional electron gas (2DEG) confined in a single GaAs/AlGaAs quantum well. Named as Tunable Antenna-Coupled Intersubband Terahertz (TACIT) mixer, the device takes advantages of intersubband transitions of the confined 2DEG for efficient, tunable absorption of THz radiation. Here we demonstrate a TACIT mixer integrated with a self-complementary antenna suitable for the broadband operation of the device. We study the tunability in both direct detection and heterodyne detection responses and show that the observed tunability behavior is consistent with our device model based on intersubband transitions. In addition, we study the DC-bias dependence of the noise at 1.4 GHz and show that the noise behavior follows that of a HEB device.
| Original language | English (US) |
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| State | Published - 2022 |
| Externally published | Yes |
| Event | 32nd International Symposium of Space Terahertz Technology, ISSTT 2022 - Baeza, Spain Duration: Oct 16 2022 → Oct 20 2022 |
Conference
| Conference | 32nd International Symposium of Space Terahertz Technology, ISSTT 2022 |
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| Country/Territory | Spain |
| City | Baeza |
| Period | 10/16/22 → 10/20/22 |
All Science Journal Classification (ASJC) codes
- Computer Networks and Communications
- Space and Planetary Science
- Electrical and Electronic Engineering
- Atomic and Molecular Physics, and Optics
- Radiation
Keywords
- high-mobility 2-dimensional electron gas
- intersubband transitions
- THz heterodyne detector