Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 15, 2015
Patent Application Number
13343599
Date Filed
March 16, 2012
Patent Citations Received
Patent Primary Examiner
Patent abstract
A heterodyne detection technique for highly localized IR spectroscopy based on an AFM. A pulsed IR source illuminates a sample and causes contact resonance of an AFM probe, which is a function of localized absorption. The probe is operated in intermittent contact mode and is therefore oscillated at a resonance frequency. A secondary oscillation is mixed in to the probe oscillation such that the sum of the secondary oscillation and the IR source pulse frequency is near another harmonic of the probe. A mixing effect causes measurable probe response at the other harmonic allowing data to be taken away from the pulse frequency.
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