Fiber-integrated silicon carbide silicon-vacancy-based magnetometer.

Area of Science:

• Quantum Sensing
• Materials Science
• Optoelectronics

Background:

• Silicon vacancies in silicon carbide (SiC) are promising for quantum sensing.
• Previous SiC quantum sensing experiments often use bulky confocal scanning systems, limiting practical use.
• There is a need for compact, fiber-integrated quantum sensing devices.

Purpose of the Study:

• To demonstrate a compact, fiber-integrated silicon carbide magnetometer.
• To achieve room-temperature magnetic field sensing using silicon vacancies.
• To explore practical applications in geophysics and biomedical sensing.

Main Methods:

• Coupling silicon vacancies in a SiC slice to an optical fiber tip.
• Realizing spin signal readout through the optical fiber.
• Studying optically detected magnetic resonance spectra at varying laser and microwave powers.

Main Results:

• Achieved optimized magnetic field sensitivity of 12.3 μT/√Hz.
• Successfully measured external magnetic field strength and polar angle.
• Demonstrated a compact, fiber-integrated system for magnetic field sensing.

Conclusions:

• The fiber-integrated SiC magnetometer offers a practical solution for quantum sensing.
• This technology paves the way for real-world applications in geophysics and biomedicine.
• The compact design overcomes limitations of previous confocal scanning systems.