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Title: Ultrafast Imaging of Surface Plasmons Propagating on a Gold Surface

Abstract

We record time-resolved nonlinear photoemission electron microscopy (tr-PEEM) images of propagating surface plasmons (PSPs) launched from a lithographically patterned rectangular trench on a flat gold surface. Our tr-PEEM scheme involves a pair of identical, spatially separated, and interferometrically-locked femtosecond laser pulses. Power dependent PEEM images provide experimental evidence for a sequential coherent nonlinear photoemission process, in which one laser source creates a PSP polarization state through a linear interaction, and the second subsequently probes the prepared state via two photon photoemission. The recorded time-resolved movies of a PSP allow us to directly measure various properties of the surface-bound wave packet, including its carrier wavelength (785 nm) and group velocity (0.95c). In addition, tr-PEEM in concert with finite-difference time domain simulations together allow us to set a lower limit of 75 μm for the decay length of the PSP on a 100 nm thick gold film.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1208727
Report Number(s):
PNNL-SA-108438
48129; KC0301020
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Nano Letters, 15(5):3472-3478
Additional Journal Information:
Journal Name: Nano Letters, 15(5):3472-3478
Country of Publication:
United States
Language:
English
Subject:
Environmental Molecular Sciences Laboratory

Citation Formats

Gong, Yu, Joly, Alan G., Hu, Dehong, El-Khoury, Patrick Z., and Hess, Wayne P. Ultrafast Imaging of Surface Plasmons Propagating on a Gold Surface. United States: N. p., 2015. Web. doi:10.1021/acs.nanolett.5b00803.
Gong, Yu, Joly, Alan G., Hu, Dehong, El-Khoury, Patrick Z., & Hess, Wayne P. Ultrafast Imaging of Surface Plasmons Propagating on a Gold Surface. United States. doi:10.1021/acs.nanolett.5b00803.
Gong, Yu, Joly, Alan G., Hu, Dehong, El-Khoury, Patrick Z., and Hess, Wayne P. Wed . "Ultrafast Imaging of Surface Plasmons Propagating on a Gold Surface". United States. doi:10.1021/acs.nanolett.5b00803.
@article{osti_1208727,
title = {Ultrafast Imaging of Surface Plasmons Propagating on a Gold Surface},
author = {Gong, Yu and Joly, Alan G. and Hu, Dehong and El-Khoury, Patrick Z. and Hess, Wayne P.},
abstractNote = {We record time-resolved nonlinear photoemission electron microscopy (tr-PEEM) images of propagating surface plasmons (PSPs) launched from a lithographically patterned rectangular trench on a flat gold surface. Our tr-PEEM scheme involves a pair of identical, spatially separated, and interferometrically-locked femtosecond laser pulses. Power dependent PEEM images provide experimental evidence for a sequential coherent nonlinear photoemission process, in which one laser source creates a PSP polarization state through a linear interaction, and the second subsequently probes the prepared state via two photon photoemission. The recorded time-resolved movies of a PSP allow us to directly measure various properties of the surface-bound wave packet, including its carrier wavelength (785 nm) and group velocity (0.95c). In addition, tr-PEEM in concert with finite-difference time domain simulations together allow us to set a lower limit of 75 μm for the decay length of the PSP on a 100 nm thick gold film.},
doi = {10.1021/acs.nanolett.5b00803},
journal = {Nano Letters, 15(5):3472-3478},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {5}
}