Patent ID: 11860087
Assignee: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for nanoscale tomographic infrared absorption imaging, the method comprising:
generating a first plurality of sets of probe measurements for a plurality of sample locations located across a surface of a sample, wherein generating, for a particular sample location, a particular set of probe measurements of the first plurality of sets of probe measurements comprises:
generating a first probe measurement of the particular set of probe measurements by illuminating the sample with infrared light at a first wavelength that varies at a first frequency and measuring a magnitude and phase of a variation in displacement of the surface of the sample over time at the particular sample location at the first frequency; and
generating a second probe measurement of the particular set of probe measurements by illuminating the sample with infrared light at the first wavelength that varies at a second frequency and measuring a magnitude and phase of a variation in displacement of the surface of the sample over time at the particular sample location at the second frequency, wherein the first frequency and the second frequency differ; and

generating, based on the first plurality of sets of probe measurements, a three-dimensional tomographic map of absorption of infrared light at the first wavelength by the sample.