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.

© 1997 Optical Society of America

Model-independent maximum-entropy method for the analysis of sum-frequency vibrational spectroscopy

Pao-Keng Yang and Jung Y. Huang
J. Opt. Soc. Am. B 17(7) 1216-1222 (2000)

Phase retrieval in nonlinear optical spectroscopy by the maximum-entropy method: an application to the |χ⁽³⁾| spectra of polysilane

E. M. Vartiainen, K.-E. Peiponen, H. Kishida, and T. Koda
J. Opt. Soc. Am. B 13(10) 2106-2114 (1996)

Phase retrieval approach for coherent anti-Stokes Raman scattering spectrum analysis

Erik M. Vartiainen
J. Opt. Soc. Am. B 9(8) 1209-1214 (1992)

Linewidth-deduction method for nonlinear optical spectroscopy with transform-limited light pulses

Pao-Keng Yang and Jung Y. Huang
J. Opt. Soc. Am. B 15(3) 1130-1134 (1998)

Deep learning as phase retrieval tool for CARS spectra

Rola Houhou, Parijat Barman, Micheal Schmitt, Tobias Meyer, Juergen Popp, and Thomas Bocklitz
Opt. Express 28(14) 21002-21024 (2020)