TY - JOUR
T1 - Surface-Enhanced Femtosecond Stimulated Raman Spectroscopy at 1 MHz Repetition Rates
AU - Buchanan, Lauren E.
AU - Gruenke, Natalie L.
AU - McAnally, Michael O.
AU - Negru, Bogdan
AU - Mayhew, Hannah E.
AU - Apkarian, Vartkess A.
AU - Schatz, George C.
AU - Van Duyne, Richard P.
N1 - Funding Information:
L.E.B., N.L.G., M.O.M., H.E.M., V.A.A., G.C.S., and R.P.V.D. were supported by the National Science Foundation Center for Chemical Innovation dedicated to Chemistry at the Space-Time Limit (CaSTL) Grant CHE-1414466. B.N. was supported by the National Science Foundation Grant CHE-1506683. N.L.G., M.O.M., and H.E.M. acknowledge support from the National Science Foundation Graduate Research Fellowship Program (DGE-0824162).
Publisher Copyright:
© 2016 American Chemical Society.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2016/11/17
Y1 - 2016/11/17
N2 - Surface-enhanced femtosecond stimulated Raman spectroscopy (SE-FSRS) is an ultrafast Raman technique that combines the sensitivity of surface-enhanced Raman scattering with the temporal resolution of femtosecond stimulated Raman spectroscopy (FSRS). Here, we present the first successful implementation of SE-FSRS using a 1 MHz amplified femtosecond laser system. We compare SE-FSRS and FSRS spectra measured at 1 MHz and 100 kHz using both equal pump average powers and equal pump energies to demonstrate that higher repetition rates allow spectra with higher signal-to-noise ratios to be obtained at lower pulse energies, a significant advance in the implementation of SE-FSRS. The ability to use lower pulse energies significantly mitigates sample damage that results from plasmonic enhancement of high-energy ultrafast pulses. As a result of the improvements to SE-FSRS developed in this Letter, we believe that SE-FSRS is now poised to become a powerful tool for studying the dynamics of plasmonic materials and adsorbates thereon.
AB - Surface-enhanced femtosecond stimulated Raman spectroscopy (SE-FSRS) is an ultrafast Raman technique that combines the sensitivity of surface-enhanced Raman scattering with the temporal resolution of femtosecond stimulated Raman spectroscopy (FSRS). Here, we present the first successful implementation of SE-FSRS using a 1 MHz amplified femtosecond laser system. We compare SE-FSRS and FSRS spectra measured at 1 MHz and 100 kHz using both equal pump average powers and equal pump energies to demonstrate that higher repetition rates allow spectra with higher signal-to-noise ratios to be obtained at lower pulse energies, a significant advance in the implementation of SE-FSRS. The ability to use lower pulse energies significantly mitigates sample damage that results from plasmonic enhancement of high-energy ultrafast pulses. As a result of the improvements to SE-FSRS developed in this Letter, we believe that SE-FSRS is now poised to become a powerful tool for studying the dynamics of plasmonic materials and adsorbates thereon.
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U2 - 10.1021/acs.jpclett.6b02175
DO - 10.1021/acs.jpclett.6b02175
M3 - Article
C2 - 27802054
AN - SCOPUS:84996938095
SN - 1948-7185
VL - 7
SP - 4629
EP - 4634
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 22
ER -