Phase sensitive detection of vibrational Optical activity free-induction-decay: vibrational CD and ORD

Hanju Rhee, Young Gun June, Zee Hwan Kim, Seung Joon Jeon, Minhaeng Cho

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21 Citations (Scopus)


Optical activity is manifested by chiral molecules including natural products and drugs, so that circular dichroism (CD) and optical rotatory dispersion (ORD) measurements can provide invaluable information on their chiro-optical properties and structures. It is experimentally demonstrated that heterodyne-detected Fouriertransform spectral interferometry with a femtosecond infrared pulse can be used to fully characterize the phase and amplitude of vibrational optical activity free-induction-decay field. The measured spectral interferograms are then converted to the linear optical activity susceptibility whose imaginary and real parts correspond to vibrational CD and ORD spectra. Unlike the conventional differential measurement technique, the present method based on a heterodyned interferometry is shown to be quite robust and stable. We anticipate that the present vibrational optical activity measurement technique will be of critical use in elucidating chirooptical properties and structural changes in biomolecules.

Original languageEnglish
Pages (from-to)1008-1017
Number of pages10
JournalJournal of the Optical Society of America B: Optical Physics
Issue number5
Publication statusPublished - 2009 May 1


ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

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