Communication: atomic force detection of single-molecule nonlinear optical vibrational spectroscopy.
Atomic Force Microscopy (AFM) allows for a highly sensitive detection of spectroscopic signals. This has been first demonstrated for NMR of a single molecule and recently extended to stimulated Raman in the optical regime. We theoretically investigate the use of optical forces to detect time and frequency domain nonlinear optical signals. We show that, with proper phase matching, the AFM-detected signals closely resemble coherent heterodyne-detected signals. Applications are made to AFM-detected and heterodyne-detected vibrational resonances in Coherent Anti-Stokes Raman Spectroscopy (χ((3))) and sum or difference frequency generation (χ((2))).
Department of Chemistry, University of California, Irvine, California 92697, USA.
Prasoon
P
Saurabh
Department of Chemistry, University of California, Irvine, California 92697, USA.
Shaul
S
Mukamel
D004247:DNA / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D018625:Microscopy, Atomic Force; D008962:Models, Theoretical; D055620:Optical Phenomena; D013059:Spectrum Analysis, Raman; D014732:Vibration
D004247:DNA