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Published on: January 28, 2019
Exploring the role of phase modulation on photoluminescence yield
D G Kuroda1, C P Singh, Z Peng
1Department of Chemistry, Chemical Physics Center, University of Florida, Gainesville, Florida, USA.
Faraday Discussions
|March 29, 2012
Summary
Phase modulation in two-photon transitions enhances emission efficiency. This technique spectrally matches cross-sections or manipulates excited-state wavepacket dynamics in different molecular systems.
Area of Science:
- Quantum Chemistry
- Molecular Spectroscopy
- Physical Chemistry
Background:
- Phase-sensitive experiments offer precise control over molecular processes.
- Two-photon transitions are crucial for various spectroscopic techniques.
- Understanding light-matter interactions at the quantum level is essential.
Purpose of the Study:
- To elucidate the control mechanisms in phase-sensitive experiments.
- To investigate the role of phase modulation in two-photon transitions.
- To differentiate the effects of phase modulation in distinct molecular systems.
Main Methods:
- Phase-sensitive experiments utilizing phase-modulated pulses.
- Optimization procedures for experimental control.
- Power dependence, spectral response, and pump-probe/pump-pump experiments.
- Analysis of two-photon cross-section and second-order power spectrum.
Main Results:
- Phase modulation consistently increased emission efficiency in two-photon transitions.
- For one molecular system, phase modulation achieved spectral matching.
- For the other system, phase modulation enabled manipulation of excited-state wavepacket dynamics.
Conclusions:
- Phase modulation is a versatile tool for controlling light-matter interactions.
- The specific mechanism of control depends on the molecular system's properties.
- This research advances the understanding and application of phase-sensitive spectroscopy.
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