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Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Published on: March 22, 2019

Infrared hot carrier diode mixer.

L W Aukerman, J W Erler

|August 15, 2009

Summary

A novel hot carrier diode mixer utilizing a cat whisker antenna detected a 54.3-GHz beatnote at 10.6 micrometers. This room-temperature detector operates via the thermoelectric effect of hot carriers in n-InAs.

Area of Science:

Solid-state physics
Terahertz technology
Materials science

Background:

Heterodyne detection is crucial for various applications, including spectroscopy and communications.
Traditional detectors often require cryogenic cooling, limiting their practicality and increasing costs.
Developing sensitive room-temperature detectors is a key challenge in advanced sensing technologies.

Purpose of the Study:

To demonstrate the detection of a high-frequency beatnote using a novel diode mixer.
To investigate the performance of a hot carrier diode with a cat whisker antenna at room temperature.
To elucidate the underlying physical mechanism responsible for the detection.

Main Methods:

Fabrication of a diode mixer comprising a "cat whisker" antenna forming an ohmic point contact with n-type Indium Arsenide (n-InAs).

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Published on: April 18, 2019

Experimental setup to generate and detect a 54.3-GHz beatnote at a wavelength of 10.6 micrometers.

Analysis of the diode's response to determine the detection mechanism.

Main Results:

Successful detection of a 54.3-GHz beatnote at 10.6 micrometers was achieved.
The diode mixer operated effectively at room temperature without external cooling.
The observed phenomenon was attributed to the thermoelectric effect of hot carriers.

Conclusions:

The developed hot carrier diode mixer is a viable room-temperature detector for high-frequency signals.
The "cat whisker" antenna design facilitates efficient signal coupling and detection.
The thermoelectric effect of hot carriers provides a robust mechanism for heterodyne detection at room temperature.