Quantitative Ultrafast Spectroscopy and Microscopy of Traditional and Soft Condensed Matter

Authors

Adam Card, University of Rhode Island
Mohammad Mokim, University of Rhode Island
Feruz Ganikhanov, University of Rhode IslandFollow

Document Type

Article

Date of Original Version

8-7-2018

Department

Physics

Abstract

We demonstrate and analyze a series of experiments in traditional and soft condensed matter using coherent optical spectroscopy and microscopy with ultrafast time resolution. We show the capabilities of resolving both real and imaginary parts of the third-order nonlinearity in the vicinity of Raman resonances from a medium probed within microscopic volumes with an equivalent spectral resolution of better than 0.1 cm⁻¹. We can differentiate between vibrations of various types within unit cells of crystals, as well as perform targeted probes of areas within biological tissue. Vibrations within the TiO₆ octahedron and the ones for the Ti-O-P intergroup were studied in potassium titanyl phosphate crystal to reveal a multiline structure within targeted phonon modes with closely spaced vibrations having distinctly different damping rates (~0.5 ps⁻¹ versus ~1.1 ps⁻¹). We also detected a 1.7–2.6 ps⁻¹ decay of C-C stretching vibrations in fat tissue and compared that with the corresponding vibration in oil.

Citation/Publisher Attribution

Card, A.; Mokim, M.; Ganikhanov, F. Quantitative Ultrafast Spectroscopy and Microscopy of Traditional and Soft Condensed Matter. Appl. Sci. 2018, 8, 1317.

Available at: https://doi.org/10.3390/app8081317

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 License.