Related Experiment Video
Updated: Aug 6, 2026
14:58
Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
Published on: June 3, 2015
Semiconductor room-temperature maser
Andreas Gottscholl1,2, Maximilian Wagenhöfer3, Valentin Baianov3
1Experimental Physics 6 and Würzburg-Dresden Cluster of Excellence ctd.qmat, Julius-Maximilians-Universität Würzburg, Würzburg, Germany. gottscholl.andreas@gmail.com.
Nature Communications
|July 24, 2026
Summary
Researchers developed the first semiconductor maser using silicon carbide (SiC) with silicon vacancies (VSi). This breakthrough enables continuous-wave operation above room temperature, paving the way for advanced maser technologies.
Area of Science:
- Quantum electronics
- Materials science
- Solid-state physics
Background:
- Semiconductor masers are crucial for advanced electronic devices.
- Silicon carbide (SiC) offers unique properties for quantum applications.
- Silicon vacancies (VSi) in SiC are promising for maser development.
Purpose of the Study:
- To demonstrate the first semiconductor maser utilizing silicon vacancies in 4H-silicon carbide.
- To explore the potential of this maser as a preamplifier, microwave photon absorber, and magnetometer.
- To investigate room-temperature continuous-wave maser operation.
Main Methods:
- Fabrication of a maser device based on VSi in 4H-SiC.
- Implementation of an active feedback loop to enhance resonator quality factor.
- Analysis of maser performance as a preamplifier, photon absorber, and magnetometer.
Main Results:
- Achieved continuous-wave maser operation above room temperature.
- Demonstrated preamplifier gain exceeding 10 dB at 110 K, with potential for >30 dB.
- Showcased optically pumped microwave photon absorption, reducing resonator temperature by 40 K.
- Attained magnetic field sensitivity of 20 pT/√Hz at room temperature, a nine-order-of-magnitude improvement in contrast-to-linewidth ratio.
Conclusions:
- SiC-based masers hold significant potential for reshaping room-temperature maser technology.
- The developed device shows promise for compact, electrically driven maser diodes.
- This work lays the foundation for future advancements in maser applications and quantum sensing.
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