Title :
Background-free heterodyne photoexpansion infrared nanospectroscopy
Author :
Feng Lu ; Mingzhou Jin ; Belkin, Mikhail A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX, USA
Abstract :
The unwanted photoacoustic pressure force in photoexpansion spectroscopy, which comes from light absorption of the sample not below the AFM tip, was suppressed at the heterodyne frequency of laser pulses and piezo-driven cantilever oscillation.
Keywords :
cantilevers; heterodyne detection; infrared spectroscopy; nanophotonics; photoacoustic effect; background-free heterodyne photoexpansion infrared nanospectroscopy; heterodyne frequency; laser pulses; light absorption; piezo-driven cantilever oscillation; unwanted photoacoustic pressure force; Absorption; Films; Force; Oscillators; Silicon; Spectroscopy; Substrates;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2015 Conference on
