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Updated: Jun 14, 2026
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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
Highly sensitive, photon number resolving detectors mediated by phonons using delta-doped GaAs transistors
Xiulai Xu1, Hugh Baker, David A Williams
1Hitachi Cambridge Laboratory, Hitachi Europe Ltd., Cambridge, United Kingdom. xx757@cam.ac.uk
Nano Letters
|March 30, 2010
Summary
We developed a new photon detector using two-dimensional electron gas (2DEG) transistors. This device achieves high internal quantum efficiency, enabling precise photon counting for advanced optical applications.
Area of Science:
- Solid State Physics
- Quantum Optics
- Nanotechnology
Background:
- Photon detection is crucial for quantum information science and optical measurements.
- Existing detectors face limitations in efficiency and photon number resolution.
- Two-dimensional electron gas (2DEG) systems offer unique electronic properties for novel device applications.
Purpose of the Study:
- To report a novel photon number-resolving detector.
- To demonstrate the functionality of 2DEG-based transistors for photon detection.
- To achieve high internal quantum efficiency in the developed detector.
Main Methods:
- Utilizing 2DEG-based transistors as the core detection element.
- Exploiting ballistic phonon transport in the 2DEG generated by photon absorption.
- Measuring current increase in nanowire transistors due to phonon-electron interaction.
Main Results:
- Achieved photon number resolution using 2DEG transistors.
- Demonstrated high internal quantum efficiency up to 85%.
- Confirmed the principle of phonon-electron interaction for detection.
Conclusions:
- The developed 2DEG-based detector offers a promising approach for high-efficiency photon number resolution.
- Ballistic phonon transport in 2DEG is an effective mechanism for single-photon detection.
- This technology has potential applications in quantum sensing and communication.
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