Diffractive-optics based fifth-order Raman spectroscopy of ultrafast liquid dynamics

Author

Kubarych, K.J. ; Milne, C.J. ; Lin, S. ; Astinov, V. ; Miller, R.J.D.

Author_Institution

Departments of Chem. & Phys., Toronto Univ., Ont., Canada

fYear

2001

fDate

11-11 May 2001

Firstpage

108

Lastpage

110

Abstract

Summary form only given. With a single diffractive optic it is possible to create a beam geometry which significantly phase mismatches the cascaded intermediates while maintaining near-perfect phase matching of the direct, fifth-order signal. Additionally, the diffractive optic provides passive phase-locking (/spl sim//spl lambda//50) necessary to implement heterodyne detection by interfering a reference local oscillator with the generated signal field. We present studies of liquid CS/sub 2/ where, in addition to the phase-contrast inherent in a heterodyne measurement, the effects of other variables, such as polarization and pathlength, distinguish the direct fifth-order response from the lower-order cascades.

Keywords

Raman spectra; Raman spectroscopy; carbon compounds; diffractive optical elements; heterodyne detection; high-speed optical techniques; optical phase matching; CS/sub 2/; CS/sub 2/ liquid; beam geometry; cascaded intermediates; diffractive optic; direct fifth-order signal; fifth-order Raman spectroscopy; fifth-order response; generated signal field; heterodyne detection; heterodyne measurement; lower-order cascades; near perfect phase matching; passive phase-locking; path length; phase mismatches; phase-contrast; polarization; reference local oscillator; ultrafast liquid dynamics; Geometrical optics; Local oscillators; Optical diffraction; Optical frequency conversion; Optical mixing; Phase detection; Raman scattering; Signal generators; Spectroscopy; Ultrafast optics;

fLanguage

English

Publisher

ieee

Conference_Titel

Quantum Electronics and Laser Science Conference, 2001. QELS '01. Technical Digest. Summaries of Papers Presented at the

Conference_Location

Baltimore, MD, USA

Print_ISBN

1-55752-663-X

Type

conf

DOI

10.1109/QELS.2001.961921

Filename

961921