Capturing ultrafast spectral evolution with transient grating photoluminescence spectroscopy

Kai Chen; Joseph K. Gallaher; Shyamal K. K. Prasad; James E. A. Webb; Pall Thordarson; Justin M. Hodgkiss

doi:10.1117/12.2236586

5 October 2016 Capturing ultrafast spectral evolution with transient grating photoluminescence spectroscopy

Kai Chen, Joseph K. Gallaher, Shyamal K. K. Prasad, James E. A. Webb, Pall Thordarson, Justin M. Hodgkiss

Proceedings Volume 9956, Ultrafast Nonlinear Imaging and Spectroscopy IV; 99560V (2016) https://doi.org/10.1117/12.2236586
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States

Abstract

We have developed a new method, transient grating photoluminescence spectroscopy (TGPLS), allowing the collection of broadband ultrafast photoluminescence spectroscopy with low photoluminescence background. In TGPLS, two ultrafast laser pulses generate a multiplexed transient grating (TG) by the optical Kerr effect. The gated signal is diffracted by the TG and spatially separated from background fluorescence. This high performance nonlinear optical gate delivers time resolution less than 200 fs, spectral bandwidth covering the entire visible region with extremely low fluorescence background. Here we present two applications of TGPLS that provide deeper insight into ultrafast energy transfer in multi-chromophore perylene arrays and ultrafast structural relaxation in oligothiophenes.

Conference Presentation

Citation Download Citation

Kai Chen, Joseph K. Gallaher, Shyamal K. K. Prasad, James E. A. Webb, Pall Thordarson, and Justin M. Hodgkiss "Capturing ultrafast spectral evolution with transient grating photoluminescence spectroscopy", Proc. SPIE 9956, Ultrafast Nonlinear Imaging and Spectroscopy IV, 99560V (5 October 2016); https://doi.org/10.1117/12.2236586

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