Thin-film semiconductor device allowing for ultrastrong magnetic resonant excitation electron spins.
Allows magnetic field measurements as well as spin quantum bit manipulation.

Magnetometers are used for a variety of sensor applications and various magnetometer concepts, each with different advantages and disadvantages. Currently available, low-cost room temperature magnetometers, however, must be calibrated for any environmental conditions under which they are operated. Most magnetometers are calibrated to account for a small range of normal operating conditions (e.g. a temperature range) only.

This monolithic organic thin-film semiconductor magnetometer eliminates the need for calibration. A dielectric thin-film provides electrical and thermal insulation between a thin-film wire, capable of inducing an AC magnetic field, and a layer stack in which spin-dependent electronic transition rates govern a measurable current. Magnetic resonance of the frequency of the AC field and the Larmor frequency of charge carriers in the thin-film device change the spin-dependent transition rates and thus, the electric current. Small electric current changes, indicative of magnetic resonance, reveal the magnetic field applied to the device.

Benchtop Prototype

• Eliminates the need for magnetometer calibration.
• Facilitates robust absolute magnetometry.
• Allows for monolithic integration of semiconductor thin-film devices with high-amplitude AC magnetic drive.
• Simplifies spectroscopy techniques including electron paramagnetic resonance spectroscopy.

Jamali, S., Joshi, G., Malissa, H., Lupton, J.M., Boehme, C. (2017). Monolithic OLED-microwave devices for ultrastrong magnetic resonant excitation. Nano Letters. 17(8): 4648-4653. doi: 10.1021/acs.nanolett.7b01135

Jonathan Tyler
801-587-0515
jonathan.tyler@utah.edu