All-Optical Cryogenic Thermometry Based on Nitrogen-Vacancy Centers in Nanodiamonds
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2019-07-23 |
| Journal | Physical Review Applied |
| Authors | Masaya Fukami, Christopher G. Yale, Paolo Andrich, Xiaoying Liu, F. Joseph Heremans |
| Institutions | University of Chicago, Argonne National Laboratory |
| Citations | 47 |
Abstract
Section titled āAbstractāThe nitrogen-vacancy (N-V) center in diamond has been viewed as a high-sensitivity nanometer-scale metrology platform. Thermometry has been a current focus, with attention largely confined to room-temperature applications. Temperature sensing at low temperatures, yet, remains challenging as the sensitivity decreases for many commonly used techniques, which rely on a temperature-dependent frequency shift of the N-V centerās spin resonance and its control with microwaves. Here we use an alternative method that does not require microwaves, ratiometric all-optical thermometry, and demonstrate that it may be utilized to liquid-nitrogen temperatures without deterioration of the sensitivity. The use of an array of nanodiamonds embedded within a portable polydimethylsiloxane sheet provides a versatile temperature-sensing platform that can probe a wide variety of systems without the configurational restrictions needed for applying microwaves. With this device, we observe a temperature gradient over tens of microns in a ferromagnetic-insulator substrate (yttrium iron garnet) under local heating by a resistive heater. This thermometry technique provides a cryogenically compatible, microwave-free, minimally invasive approach capable of probing local temperatures with few restrictions on the substrate materials.