Accelerated Nano-Optical Imaging through Sparse Sampling
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- Columbia Univ., New York, NY (United States)
- Stony Brook Univ., NY (United States)
- Columbia Univ., New York, NY (United States); Stony Brook Univ., NY (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
- National Institute for Materials Science (NIMS), Tsukuba (Japan)
- Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
- Stony Brook Univ., NY (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
The integration time and signal-to-noise ratio are inextricably linked when performing scanning probe microscopy based on raster scanning. This often yields a large lower bound on the measurement time, for example, in nano-optical imaging experiments performed using a scanning near-field optical microscope (SNOM). Here, in this study, we utilize sparse scanning augmented with Gaussian process regression to bypass the time constraint. We apply this approach to image charge-transfer polaritons in graphene residing on ruthenium trichloride (α-RuCl3) and obtain key features such as polariton damping and dispersion. Critically, nano-optical SNOM imaging data obtained via sparse sampling are in good agreement with those extracted from traditional raster scans but require 11 times fewer sampled points. As a result, Gaussian process-aided sparse spiral scans offer a major decrease in scanning time.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- Gordon and Betty Moore Foundation (GBMF); Japan Society for the Promotion of Science (JSPS); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704; SC0019443
- OSTI ID:
- 2472848
- Report Number(s):
- BNL--226261-2024-JAAM
- Journal Information:
- Nano Letters, Journal Name: Nano Letters Journal Issue: 7 Vol. 24; ISSN 1530-6984
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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