Phase-retrieval problems in infrared-visible sum-frequency generation spectroscopy by the maximum-entropy method

Pao Keng Yang*, Jung Y. Huang

*Corresponding author for this work

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

A phase-retrieval procedure based on the maximum-entropy method is applied to infrared-visible sum-frequency generation spectroscopy. Several typical effects on the error phase are also examined with the aid of a known theoretical model. The interference between the resonant and the nonresonant parts changes the behavior of the error phase. Even in some cases when the nonresonant part is complex, the error phase becomes like a step function. This result contradicts the smoothness assumption for the error phase, and the whole phase-retrieval procedure breaks down in these cases. A comparison of the results of phase-retrieval procedures between infrared-visible sum-frequency generation and coherent anti-Stokes Raman scattering spectra is made. Some ideas that worked well in previous analyses of coherent anti-Stokes Raman scattering spectra become inapplicable in the infrared-visible sum-frequency generation spectra in spite of the resemblance of their line shape functions.

Original languageEnglish
Pages (from-to)2443-2448
Number of pages6
JournalJournal of the Optical Society of America B: Optical Physics
Volume14
Issue number10
DOIs
StatePublished - 1 Jan 1997

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