Wide-field Magnetic Field and Temperature Imaging using Nanoscale Quantum Sensors
Name
1903.05717.pdf
Description
Submitted version
Size
4 MB
Format
Unknown
Checksum (MD5)
eaaf184bb9a39f786d84b74767e1d719
Author(s)
Foy, Christopher C.
Zhang, Lenan
Trusheim, Matthew E
Bagnall, Kevin Robert
Walsh, Michael E
Wang, Evelyn
Englund, Dirk R.
Date Issued
2019
Journal
ACS Applied Materials & Interfaces
Publisher
American Chemical Society (ACS)
Version
Original manuscript
Abstract
© 2020 American Chemical Society. The simultaneous imaging of magnetic fields and temperature (MT) is important in a range of applications, including studies of carrier transport and semiconductor device characterization. Techniques exist for separately measuring temperature (e.g., infrared (IR) microscopy, micro-Raman spectroscopy, and thermo-reflectance microscopy) and magnetic fields (e.g., scanning probe magnetic force microscopy and superconducting quantum interference devices). However, these techniques cannot measure magnetic fields and temperature simultaneously. Here, we use the exceptional temperature and magnetic field sensitivity of nitrogen vacancy (NV) spins in conformally coated nanodiamonds to realize simultaneous wide-field MT imaging at the device level. Our "quantum conformally attached thermo-magnetic"(Q-CAT) imaging enables (i) wide-field, high-frame rate imaging (100-1000 Hz); (ii) high sensitivity; and (iii) compatibility with standard microscopes. We apply this technique to study the industrially important problem of characterizing multifinger gallium nitride high-electron mobility transistors (GaN HEMTs). We spatially and temporally resolve the electric current distribution and resulting temperature rise, elucidating functional device behavior at the microscopic level. The general applicability of Q-CAT imaging serves as an important tool for understanding complex MT phenomena in material science, device physics, and related fields.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
Massachusetts Institute of Technology. Department of Mechanical Engineering
Lincoln Laboratory
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
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DOI of Published Version
https://doi.org/10.1021/ACSAMI.0C01545
