Magnetic sensor, detection unit, detection system, substrate for magnetic sensor, waveguide body for magnetic sensor, opto-electric hybrid substrate for magnetic sensor, and detection substrate for detection unit

A magnetic sensor comprising:

• a plurality of substrates;
• and
• an opto-electric hybrid substrate in contact with each of the plurality of substrates, each of the plurality of substrates comprising
• on a surface not in contact with the opto-electric hybrid substrate, a first layer comprising a diamond crystal in which a nitrogen vacancy (NV) center is disposed, and
• on a surface in contact with the opto-electric hybrid substrate, a second layer on which an electrode pattern is disposed;
• the opto-electric hybrid substrate comprising
• a line configured to transmit a microwave that generates electron spin resonance to the electrode pattern on each of the plurality of substrates, and
• an optical waveguide configured to transmit, exciting light to each of each of the plurality of substrates and receive fluorescence from each of the plurality of substrates, the exciting light irradiating the first layer of the substrate and emitting the fluorescence, the fluorescence having light intensity changed by electron spin resonance in the first layer of the substrate.

A substrate for a magnetic sensor, the substrate comprising:

• on a surface not in contact with a waveguide body, a first layer comprising a diamond crystal in which a nitrogen vacancy (NV) center is disposed;
• and
• on a surface in contact with the waveguide body, a second layer on which a conductive pattern is disposed,
• wherein the first layer is configured to emit a fluorescence that is transmitted through an optical waveguide in response to the second layer being irradiated by an exciting light that is transmitted through the optical waveguide, the fluorescence having light intensity changed by electron spin resonance in the first layer of the substrate.