Enhanced quantum sensing with room-temperature solid-state masers.

Area of Science:

• Quantum Sensing
• Solid-State Physics
• Materials Science

Background:

• Solid-state electron spin systems are crucial for quantum sensing applications.
• Current limitations include broadened linewidth and inefficient readout in spin ensembles.
• Exploiting collective spin behavior promises enhanced detection limits.

Purpose of the Study:

• To overcome limitations in solid-state spin ensemble sensing.
• To demonstrate a novel approach using maser technology at room temperature.
• To improve linewidth and readout efficiency for enhanced sensitivity.

Main Methods:

• Experimental demonstration of maser technology in a solid-state molecular spin ensemble.
• Utilizing maser action to reduce electron paramagnetic resonance linewidth.
• Applying maser-based readout for near zero-field magnetometry.

Main Results:

• Achieved a fourfold reduction in the electron paramagnetic resonance linewidth.
• Observed linewidth narrower than single spins at cryogenic temperatures.
• Demonstrated a signal-to-noise ratio of 133 for single-shot measurements in magnetometry.

Conclusions:

• Maser technology effectively overcomes linewidth broadening and readout inefficiency in solid-state spin ensembles.
• This technique offers a significant improvement in sensitivity for quantum sensing.
• The reborn maser technology is a valuable addition to the field of solid-state ensemble spin sensors.