Development of Ultrafast Electronic-Raman 2D Spectroscopy
Abstract
We have demonstrated a new nonlinear optical spectroscopic technique: Ultrafast Two Dimensional Electronic-Raman spectroscopy (2DER), which is capable of measuring the correlation between excited electronic states and their vibrational Raman spectral signature. In this technique, each of the multiple excited electronic transitions in a complex system can be correlated with its low vibrational frequency (Raman) spectrum. The 2DER spectrum presents the initial actinic excitation wavelength with nanometer spectral resolution in the first axis, and the detected stimulated Raman spectra in the second axis. This work has been published in a leading journal in optics: Optics Letters 43, 939 (2018). With this technique, we will be able to obtain an unprecedented picture of how the transient structure mediates the functions and properties of important biological and chemical systems. We present preliminary results on the application of 2DER on characterization of the dark state of photosynthetic accessory pigment beta-carotene.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 14, 2018
- Accession Number
- AD1058291
Entities
People
- Howe-Siang Tan
Organizations
- Nanyang Technological University