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Sensitive and Selective Detection of Low-Frequency Vibrational Modes Through a Phase-Shifting Fourier Transform Spectroscopy

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3 Author(s)
Schlup, P. ; Dept. of Electr. & Comput. Eng., Colorado State Univ., Fort Collins, CO ; Wilson, J.W. ; Bartels, R.A.

We introduce a sensitive technique for the measurement of impulsively excited vibrational Raman modes. A linear sweep in the instantaneous frequency of the probe pulse isolates Raman sidebands from noise, enhancing sensitivity. The temporal interference between two stretched, time-delayed pump pulses allows us to selectively excite specific modes. The method is shown to be applicable to different phases of the samples.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:45 ,  Issue: 7 )