10.1021/acs.jpclett.8b02643.s001
Alan G. Joly
Alan G.
Joly
Yu Gong
Yu
Gong
Patrick Z. El-Khoury
Patrick Z.
El-Khoury
Wayne P. Hess
Wayne P.
Hess
Surface Plasmon-Based Pulse Splitter and Polarization
Multiplexer
American Chemical Society
2018
wave packets
antisymmetric mirror plane
phase-locked wave packets
orthogonal polarizations
Finite difference time domain calculations
Polarization Multiplexer Surface plasmon polaritons
pulse splitter
SPP displays
laser field
femtosecond laser excitation
polarization multiplexing
photoelectron emission
probe pulse
nanophotonic circuits
one-half period
cap structure
Surface Plasmon-Based Pulse Splitter
photoemission electron microscopy
femtosecond pulse
2018-10-11 13:19:06
Media
https://acs.figshare.com/articles/media/Surface_Plasmon-Based_Pulse_Splitter_and_Polarization_Multiplexer/7195442
Surface plasmon polaritons (SPPs)
launched from a protruded silver
spherical cap structure using <i>s</i>-polarized femtosecond
laser excitation are investigated using photoemission electron microscopy.
The resulting SPP is comparable in intensity to SPPs launched with <i>p</i>-polarized excitation but propagates with a distinct spatial
profile. The spatial and temporal properties of the nascent SPP are
determined by splitting the femtosecond pulse into a spatially separated
pump–probe pair of orthogonal polarizations. The <i>s</i>-polarized pump pulse initiates the SPP, which is then visualized
by the photoelectron emission induced by a spatially and temporally
separated <i>p</i>-polarized probe pulse. The <i>s</i>-polarization launched SPP displays a bifurcated spatial structure
with an antisymmetric mirror plane and may be regarded as two spatially
distinct, temporally phase-locked wave packets. Significantly, the
wave packets are one-half period out of phase with each other governed
by the phase of the driving laser field. Finite difference time domain
calculations corroborate the experimental results. The resulting SPP
can be utilized for either polarization multiplexing or as a pulse
splitter in nanophotonic circuits.